tedds manual - january 2006

Training Manual

January 2006

© 2006 CSC (UK) Limited All rights reserved

CSC (UK) Ltd Yeadon House

New Street Pudsey LEEDS

West Yorkshire LS28 8AQ

Tel: 0113 2393000 Fax: 0113 2553917

E-mail:

Technical Support Team: [email protected] TEDDS comments/ suggestions: [email protected] FASTRAK comments/ suggestions: [email protected]

Internet Sites:

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Computer Services Consultants (UK) Limited, hereinafter referred to as the OWNER, retains all proprietary rights with respect to this program package, consisting of all handbooks, drills, programs recorded on CD and all related materials. This program package has been provided pursuant to an agreement containing restrictions on its use.

This publication is also protected by copyright law. No part of this publication may be copied or distributed, transmitted, transcribed, stored in a retrieval system, or translated into any human or computer language, in any form or by any means, electronic, mechanical, magnetic, manual or otherwise, or disclosed to third parties without the express written permission of the OWNER.

This confidentiality of the proprietary information and trade secrets of the OWNER shall be construed in accordance with and enforced under the laws of the United Kingdom.

CSC Training documentation: CSC Training software: © 2006 CSC (UK) Limited © 2006 CSC (UK) Limited All rights reserved. All rights reserved.

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CONTENTS

1 GETTING STARTED................................................................................................ 1

1.1 INTRODUCTION ......................................................................................................................1 1.1.1 What is TEDDS?...............................................................................................................................1

2 USING THE CALCULATIONS................................................................................. 3

2.1 EXERCISE 1: TEDDS CALCULATION INTERFACES .....................................................................3 2.1.1 Selecting a calculation from the Library Access System......................................................................3 2.1.2 Design Brief ......................................................................................................................................3 2.1.3 Starting TEDDS for Word ..................................................................................................................3 2.1.4 Selecting a Calculation......................................................................................................................3 2.1.5 Calculating........................................................................................................................................5 2.1.6 TEDDS Data Lists.............................................................................................................................7 2.1.7 Messages .........................................................................................................................................8 2.1.8 Progress Log ....................................................................................................................................9 2.1.9 Output ..............................................................................................................................................9 2.1.10 Re-Calculating ................................................................................................................................ 10 2.1.11 Document Header and Printing........................................................................................................ 11 2.1.12 Saving ............................................................................................................................................ 11 2.2 EXERCISE 2: LINKING CALCULATIONS. ...................................................................................13 2.2.1 Linking Calculations ........................................................................................................................ 13 2.2.2 Design Brief: ................................................................................................................................... 13 2.2.3 Adding Your Own ‘Links’.................................................................................................................. 17 2.3 EXERCISE 3: CALCULATION SECTIONS. ..................................................................................19 2.3.1 Using Calculation Sections .............................................................................................................. 19 2.3.2 Design Brief: ................................................................................................................................... 19 2.3.3 Add a New Calc Section.................................................................................................................. 24 2.3.4 TEDDS Data Tables........................................................................................................................ 26 2.3.5 Calc Section Variables .................................................................................................................... 28 2.3.6 Re-Calculating Calc Sections .......................................................................................................... 29 2.3.7 Promoting and transferring variables between sections .................................................................... 29

3 WRITING YOUR OWN CALCULATIONS.............................................................. 31

3.1 EXERCISE 4: CALC WRITING BASICS .....................................................................................31 3.1.1 Design Brief .................................................................................................................................... 31 3.1.2 4A - Defining Variables.................................................................................................................... 32 3.1.3 4B - Output Expressions.................................................................................................................. 33 3.1.4 TEDDS Variables............................................................................................................................ 34 3.1.5 4C - Further Calculations................................................................................................................. 35 3.2 EXERCISE 5: ENHANCING CALCULATIONS ..............................................................................37 3.2.1 5A – Insert TEDDS Field ................................................................................................................. 37 3.2.2 5B – Including TEDDS Data Lists .................................................................................................... 40 3.2.3 5C – Output Fields .......................................................................................................................... 43 3.2.4 5D – Formatting Your Calculations................................................................................................... 47 3.2.5 Tidying and Saving Your Calculation................................................................................................ 47 3.2.6 5E – Including Data Tables.............................................................................................................. 48 3.2.7 Tidying and Saving Your Calculation................................................................................................ 50 3.3 EXERCISE 6: USING THE LIBRARY ACCESS SYSTEM ................................................................51 3.3.1 Understanding the TEDDS Library Access System........................................................................... 51 3.3.2 6A – Saving Calculations in the Library Access System.................................................................... 52 3.3.3 6B – Using the Calc Item function in the Insert TEDDS Field ............................................................ 57


4 TEDDS UTILITIES.................................................................................................. 59

4.1 EXERCISE 7: BEAM ANALYSIS ...............................................................................................59 4.1.1 Generic Beams ............................................................................................................................... 59 4.1.2 Specific Sections and Materials. ...................................................................................................... 64 4.2 EXERCISE 8: SECTION PROPERTIES TOOL. .............................................................................65 4.2.1 Overview ........................................................................................................................................ 65 4.2.2 Notes from the Library Access System............................................................................................. 66 4.2.3 Pre-Defining SPT Shapes................................................................................................................ 66 4.2.4 Exercise Aims................................................................................................................................. 67 4.2.5 Launch the Section Property Tool .................................................................................................... 67 4.2.6 Adding Pre-Defined Shape .............................................................................................................. 69 4.2.7 Copying & Rotating ......................................................................................................................... 70 4.2.8 Moving and Snapping Shapes Together........................................................................................... 70 4.2.9 Grouping Shapes ............................................................................................................................ 71 4.2.10 Insert a User Defined Shape............................................................................................................ 71 4.2.11 Snapping Shapes Together ............................................................................................................. 72 4.2.12 Positioning the Shape ..................................................................................................................... 72 4.2.13 Viewing the Section Properties ........................................................................................................ 73 4.2.14 Storing the Section.......................................................................................................................... 74 4.2.15 Returning Section Details to the Document ...................................................................................... 74


1 GETTING STARTED 1.1 Introduction

1.1.1 What is TEDDS? TEDDS – The Calc Pad For The Professional Engineer - is a software program that allows you run pro-forma calculations or to create and edit your own calculations. When you first load TEDDS you will get the option to run ‘TEDDS’ or ‘TEDDS for Word’. Although the whole package is collectively known as TEDDS, there is a difference between the modes you can work in. The difference is as follows:

TEDDS Is a very easy to use, powerful tool that allows you to run the extensive library of pro-forma calculations quickly. TEDDS is a standalone application that does not require Word since you can save and print calculations within this version, although there are capabilities to export finished calculations into both Word and TEDDS for Word. We recommend that if you are a new or an infrequent user that you start with TEDDS – if you want to write your own calculations or need more capabilities then the step up to TEDDS for Word is straightforward and familiar. As TEDDS is so easy to use we will not cover it during this course.

TEDDS for Word Allows you to run pro-forma calculations from the extensive library of pro-forma calculations, and place the output in a Word document. Because it uses Word, you can have multiple calculations in a single document, you can also add anything else you require, text, sketches, pictures etc - you have the full capabilities of Word as well as TEDDS. Additionally you also have the capability to write your own calculations. This is the most powerful mode of working and gives you most capabilities; however there is more for you to learn.


2 USING THE CALCULATIONS

2.1 Exercise 1: TEDDS Calculation Interfaces

2.1.1 Selecting a calculation from the Library Access System To run a pro-forma calculation in TEDDS for Word:

• Select the required calculation from the Library Access System.

• Insert the calculation into an active document

• Use one of the Calculate commands to start calculating.

The TEDDS engineering library is accessed from the Library Access System, which opens in a separate window. The calculations can be selected from various Indexes and you can choose the most suitable by using the drop list at the top of the window:

All TEDDS Calcs & Components Complete pro-formas & components (the entire library) TEDDS Calcs by Element Complete pro-formas grouped by element TEDDS Calcs by Material Complete pro-formas grouped by material CSC Downloads ‘New’ CSC engineering downloaded from www.tedds.com My Calcs User calculations saved to the library

2.1.2 Design Brief Over the next few pages we will size a steel beam with the following design data:

• Span = 4000 mm

• Full dead UDL: = 40 kN/m

• Imposed point load mid span = 25 kN

• Trial Serial size = UB 203x133x25

• Absolute limit on deflection = 15 mm

2.1.3 Starting TEDDS for Word Ø Start TEDDS using the icon on your desktop. Ø From the TEDDS - Start Wizard click on TEDDS for Word.

2.1.4 Selecting a Calculation Ø On the Library Access System window, choose TEDDS Calcs by Material from the drop list, and

then double-click the Steel folder to open it. This will show all the various steel designs available. Ø Click on the Steel simple beam analysis & design (BS5950:Part1:2000).

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Ø Click the Preview button on the Library Access System toolbar and you will see the Notes

associated with the calculation.

Ø Click the button Ø Select Insert in active document to insert the calculation it in your document.


Ø Now close the Library Access System. Note that you can launch it again by clicking this button. 2.1.5 Calculating

Ø To start the calculation, click the Calculate All button. The various calculation options can also be accessed from the TEDDS – Calculate menu or by clicking the right mouse button on the document which will give the options below.

The Simple Beam Analysis Interface and the Progress Log will appear: Ø Input an Effective Span of 4000 mm

Ø Move your cursor over the symbols preceding the text to read the notes associated with this input.


Ø Accept the default values for the various design options and click Next.

Ø For Load 1 specify Type = Full UDL, Class = Dead, Wa = 40 kN/m. Add a description such as

slab if you wish. Ø Click the + Add Load button to create Load 2 and select Type = 1PL (centre point load), Class =

Imposed and P = 25 kN. Ø Check the box for Bending moment so that this sketch will be added to the final calculation, then

click Next.


Ø Click on the Sketches button to display the sketches associated with this calculation. Note the simple beam design is straight forward and so is its sketch but other calculations such as a retaining wall will have more Variables and dimensions that require defining so these sketches can be very useful.

Ø Close the sketch and then click Select button and the steel sections Data List will

appear.

2.1.6 TEDDS Data Lists The following Data List is for European Steel Sections:

Ø Select a UB 203x133x25 section and then click the Details button to examine the values defined by this selection.


Ø Click the Select button to continue the calculation. The selected section will now be shown on the

interface. Ø Click Next and you will get a Validation Error message.

2.1.7 Messages

Ø The information in the Message that appears is telling you that you need to specify the effective length.

Ø Click OK to continue. You will notice that the Details buttons are drawn in red text indicating that you have to specify information to continue. Other messages may include information of values calculated which also appear in the Progress Log.

Ø Click the red Details button and then OK to accept the effective length. Ø Click the Details button for the “Bending deflection check” and input a value of 15 mm for the

absolute limit on deflection and click OK. Ø Click Next and information will appear in the Progress Log.


2.1.8 Progress Log

Ø Examine the Progress Log Window as it gives you quick information about the status of a check. You can examine the completed calculations in more detail if you want to know how that status has been determined, or how closely a check has passed or failed.

Note the information is showing a number of Fails!

2.1.9 Output We requested a Summary level of output so a table of input details and a table of results will be displayed on the calculation sheet.


2.1.10 Re-Calculating Our initial 203x133x25kg beam has failed the deflection, moment and lateral torsional buckling (LTB) checks so we need to rerun the calculation and select a heavier section. To rerun a calculation you follow the procedure shown above for calculating. Ø Click Calculate All. The values you defined earlier will be stored so all you need to do is accept

the values and change the section to a UB 457x152x60.

Ø On the last page of the interface change the output options to Full to see the calculations in more detail.


2.1.11 Document Header and Printing

Ø Click the Header Properties button

Ø Enter some project details and click OK. The details will then be displayed in the document Header.

Ø If you have a printer connected to your PC and wish to print a design click the Print button.

2.1.12 Saving You save a TEDDS for Word document in exactly the same way that you would save a normal Word document i.e. by selecting File\Save or clicking the Save button.

• The saved file is a normal Word documents with a .DOC file extension.

• A second file with the same name but with a .VBL extension will be saved in the same location

as the document file.

• The .VBL file contains the list of Variables. If the .DOC and .VBL files become separated then

the next time the document is opened you will need to re-calculate and re-enter all the data, to

re-create the Variables and hence the .VBL file.

• You can have any number of documents open at any one time and switch between them via the

Window menu.

Ø Save the document as Steel Beam Design.doc (which will automatically create the Steel Beam

Design.vbl file).


2.2 Exercise 2: Linking Calculations.

2.2.1 Linking Calculations In TEDDS for Word, it is possible to link calculations together - for example from loading to analysis to design calculations. If the Variables of one calculation have the same name as the Variables of a subsequent calculation, then they will link together automatically.

2.2.2 Design Brief: Over the next few pages we will size a Column Base Plate and RC Pad Base with the following design data:

• Design axial load from column = 1500 kN

• Fill above base = 300 mm

• Trial base thickness = 450 mm

• Allowable bearing pressure = 125 kN/m2 Ø Close all open documents. Ø Open a New Default Calc Sheet Ø Launch the Library Access System and choose Calcs by Element. Ø Execute the Column base plate design (BS5950:Part 1:2000) and then RC pad footing design

(BS8110:Part 1:1997) and append them to the same document.


Ø Click Calculate All Ø Enter the following options and design values.

Ø Note that you must choose a section size to continue. Try a 305 x 305 UC 97. Ø Enter the base plate dimensions. Note that the minimum values are calculated and entered as

defaults. Use your engineering judgement to enter sensible dimensions (not necessarily those shown below).

Ø Click Next to continue.


Ø The interface for the RC Pad Base Design will now be displayed. Enter the options shown below.

Ø Click Next and enter the values below. The Length of loaded area dimensions determined by the previous calculation is entered automatically. Note the values can be shown with up to 12 decimal places so you may need to move the cursor to the start of the text box.

Ø Click Next to continue to the next page. A minimum dimension is calculated but it is up to you to enter a sensible value.

Ø Click Next to continue to the final page.


Ø Enter the values shown below.

Ø Note the minimum areas of steel are calculated and displayed before the calculation enters a Data

List for bar areas by spacing.

Ø Select a suitable arrangement of bars for X-axis reinforcement, (Hint: check the Progress Log). Ø Repeat the process for Y-axis reinforcement. Ø Continue until the calculation is finished - examine the Progress Log for a summary of the status

of all the checks carried out by the calculation.

Ø Close the Progress Log and look at the calculations on the page. If anything is failing, determine

by how much. (Hint: If there is a requirement for additional reinforcement to resist punching shear you may wish to re-run the design and increase the area of main steel provided).


2.2.3 Adding Your Own ‘Links’ The calculations will not always link together ‘automatically’. This will be because the Variables required by a subsequent calculation have not been defined during the running of the proceeding calculations. For example, in our Pad Base Design we had to specify the Factored column axial load (Fc_f) and the Unfactored column axial load (Fc_u) even though we had entered the Design axial compression (Fc) as part of the Column Base Plate calc. Ø To create a link for the approximate Factored and Unfactored column axial loads, place your cursor

after the Column Base Plate design but BEFORE the Pad Base design and type the following lines:

Note you must use exactly the right upper/lower case and subscript formats to match the Variables involved. Use copy and paste where possible Ø Calculate the document. A variable of Fc_f equal to Fc and Fc_u equal to Fc / 1.5 will be added to

the list of stored variables as soon as the base plate check is complete. These variables will then be picked up and used by the pad base design.

Ø As an example of how to refine your calculations slightly and to display the values assigned, we will

look at Fc_u so change that line to:

(Note the semi-colons are important). Ø Calculate the document again and try changing the initial value for the column base plate Design

axial compression (Fc). You should see the value of Fc as the value for Fc_f and the new approx. value for Fc_u displayed in the RC Pad Base interface.

Ø Save the document if you want to. Note: If we had previously run the column load chase design from the library, both a ULS and SLS axial load would have been calculated, and stored, already and therefore ‘linked’ into both the column base plate and RC pad base designs ‘automatically’.

Factored column load; Fc_f = Fc = ? kN

Approx. unfactored column load; Fc_u = Fc / 1.5 = ? kN

Fc_f = Fc

Fc_u = Fc / 1.5


2.3 Exercise 3: Calculation Sections.

2.3.1 Using Calculation Sections As we have shown in the previous exercise, a document will only have one Variable with a particular name. However, when you have several similar calculations you will need several Variables with the same name. To achieve this you can use Calculation Sections to confine each set of Variables into a discrete ‘section’ of the calculations in a document.

• Whenever you have calculations for more than one element in a document, we strongly

recommend that you use Calculation Sections.

• You create a Calc Section by inserting a Calculation Section field at the start of the calculations

for the particular element. Before starting calculations for another element, you must create a

new Calc Section.

• The Calc Section field shows forms the Title of the Calc Section.

In the following example we will design a timber beam in a calculation section and a masonry column in another calculation section. This will show that the cross-sectional area of the timber defined as ‘A’ can have a different value to the plan area of the column also defined as ‘A’. We will also show that document variables can be predefined and picked up by the sections and that variables can be promoted and then redefined in another calculation section.

2.3.2 Design Brief:

Several houses on an estate are to be altered and require their existing timber beams and masonry columns to be checked. All masonry columns were constructed of standard format bricks with a compressive strength of 10 N/mm2 with a mortar designation of iii. Column heights, beam moments and reactions vary throughout the site. Over the next few pages we will check a house with the following design data.

• Maximum moment for timber design = 15 kNm

• Maximum shear force for timber design = 18 kN

• Column height = 2700 mm

• Column width = 215 mm

• Column thickness = 215 mm

Ø Close all open documents. Ø Open a New Default Calc Sheet. Ø Select Calc 3 Column paragraph style. Ø Type the following lines of information into the document – Note Variables are case sensitive.

Ø Click Calculate All.

Masonry Data: Compressive strength of bricks; punit = 10 N/mm2 Mortar Designation; Mortar = “iii”


Ø Click the Variables button on the TEDDS Calcs toolbar or from the right click menu. Ø The Variables window will be shown, click on the Document tab and you will see that Mortar and

punit have been added to the document list as shown below. Click Cancel to return to the calculation document.

Ø Click the Add New Calc Section button.

Ø Enter a calculation section title and then click OK. The Calculation Section title should be written to

the page. Ø Now launch the Library Access System and Execute the Timber simple beam analysis &

design (BS5268:Part2:2002) calculation and Insert in active document:


Ø Close the Library Access System. Ø Position the insert cursor below the “Timber Beam” Calc Section title and click Calculate Section.

• Note the Calc Section Title is displayed in the Progress Log.

Ø Enter the following options and click the Next button:

Ø Enter the following options and uncheck the deflection box.


Ø Click the ‘Section…’ button and you will see a Data List, pick a 200x300 Sawn Softwood section.

Ø Click the ‘’Details’ button if you want to view the section properties.

Ø Close the Details box and then click the ‘Select’ button to confirm the selection.


Ø Click the ‘Grade stresses’ button and you will see another Data List. Select timber grade C16 by clicking the ‘Select’ button, followed by clicking the ‘Next’ button and then enter the following design values:

Ø Click Next and you will see a preview of the results.

Ø Click ‘Finish’ to output the calculations to the document.


Ø Examine the Progress Log

Ø Close the Progress Log and examine the calculations in your document.

2.3.3 Add a New Calc Section We now wish to carry out a calculation for a masonry column in the same building - a completely different element.

Ø Place the cursor below the new Calc Section title Execute the following item from the Library.

Ø Select Append to active document and Add new Calc Section and Insert page break. Ø Change the Calc Section Title is you want to then click OK.


Ø Click the right mouse button and select the Calculate Calc Section option and the Masonry column calculation interface should be displayed:

Ø Click the ‘Select f_k’ button and a Data Table for Characteristic compressive strength of masonry

will now be displayed:


2.3.4 TEDDS Data Tables Tables from design codes are included in TEDDS, and are integrated with the pro-forma calculations. If previous input data has been defined, these Data Tables will automatically interpolate and select a design value for you.

In our example

• The input parameters of the table have been defined so the Data Table will interpolate the Compressive strength of standard format bricks and mortar designation and hence pick the corresponding fk value.

• The output value of the table is highlighted in yellow - these values will be entered into the list of Variables in the calculation section and hence your calculation.

Ø Click the Variables tab at the bottom of the table to see the Variables associated with this Data

Table. You will see the variables values we defined at the top of the page. When these are already defined the table will interpolate the value for you.

Ø Some Data Tables have associated diagrams and notes, to view them click the Sketches tab or

the Notes tab. Ø When you have selected a value or are happy with the value that has been selected for you, click

the Copy to calcs button, or hit the Enter key on your keyboard.


Ø As the column is made of bricks rather than blocks make sure that you check the box for BS5628:Pt 1:1992…2a then click OK on the Copy to Calcs - Options dialog.

Ø Enter the values for column height, column width, column thickness and eccentricities as shown

below and click Next.

Ø Have a quick look at the preview and then click Finish.

Ø Examine the Progress Log to check everything passes then close it.


2.3.5 Calc Section Variables

Ø Click within the Timber Beam Calculation Section and then click the Variables button . Ø Then click the Calc. Section tab to view the Variables stored in this Calculation Section:

Ø To view the Variables for the masonry column – close the Variables dialog, place your cursor

somewhere in the column Calculation Section and click the Variables button.

Ø Notice that the values of A are are different in each section. Ø Now click the Variable Manager tab and you can see that the Variable Manager page of the

dialog is now split into a Document list and a Calc Section list. This shows you how TEDDS keeps the different Calculation Sections separate by saving the Variables in discrete lists.


2.3.6 Re-Calculating Calc Sections To re-calculate a Calculation Section simply place your cursor within the Calc Section and click the Calculate Calc Section button, TEDDS will use the Calc Section fields to determine where to start and finish calculating. Our timber beam has a max shear value Fmax = 18kN which is the unfactored vertical load on the masonry column and in the previous designs we simply entered this value as Variable V. We should have used a factored load (i.e. 18 × 1.6 = 28.8kN) so will we re-calculate the column design with this corrected value. Ø Scroll your document and move then insert your cursor within the Masonry Column Calculation

Section Ø Click the Calculate Calc Section button. Ø Input the value of 28.8 in the vertical load V text box and click Next and Finish to complete the

calculation.

2.3.7 Promoting and transferring variables between sections We would actually like the reaction on the timber beam to be ‘automatically’ linked to the vertical load on the masonry column. Ø Place the insert cursor at the end of the Timber Beam calculation and press the Enter key to add a

few empty paragraphs. Ø Type the following text to define a unique Calc Section Variable for the factored reaction and also

to ‘promote’ it to a Document Variable:

Ø Now place the insert cursor below the Masonry Column Calculation Section title but before the

start of the actual calculation and press the Enter key to add a few empty paragraphs. Ø Type the following text to link the vertical load on the column with the promoted value of the beam

factored reaction:

Your written calculation should look similar to this:

Factored reaction from timber beam; V = V1 = ?f1 kN

Factored Reaction; V1 = Fmax × 1.6 = ?f1 kN PromoteVariable(“V1”) = ?


Ø Click Calculate All to re-calculate both designs. Change the value of Fmax in the timber beam calculation and you will see that the value of V in the masonry calculation update accordingly.

Ø Place the insert cursor within the timber beam Calc Section, click on the Variables button and select the Variable Manager tab - you will see that there is an arrow indicating that V1 has been promoted to a Document Variable. You can also promote Variables using the ‘ß Add’ button in the Variables dialog.

Ø Close the Variables dialog and save the document if you want. Editing a Calc Section Title Although the Title for a Calc Section is visible within the document it is not recommended that you directly edit the calc section field because if you change the field codes or accidentally delete the field then the link between the document and the calc section variables may be broken. To edit a calc section title:

• Move the insertion point to the Calc Section you want to edit. • On the TEDDS menu, point to Calc Section, and then click Edit... • In the Title box, type the new title for the Calc Section. • Click OK.

Deleting a Calc Section To delete a calc section from your document including all the section variables:

• Move the insertion point to the Calc Section you want to delete. • On the TEDDS menu, point to Calc Section, and then click Delete Calc Section.

If you want to copy the Calc Section to the Windows clipboard before deleting the section use the Cut Calc Section command instead. Copying a Calc Section Using the commands provided it is possible to create a second copy of a Calc Section within the current document, or to copy a Calc Section to another document. Using the commands provided ensures that a new unique calc section is created including a copy of all the stored variables for the section. To copy a Calc Section:

• Move the insertion point to the Calc Section you want to copy. • On the TEDDS menu, point to Calc Section, and then click Copy Calc Section or use the

Copy Calc Section command from the TEDDS Calcs toolbar. • Move the insertion point to the location where you want to insert the copy of the Calc Section. • On the TEDDS menu, point to Calc Section, and then click Paste Calc Section or use the

Paste Calc Section command from the TEDDS Calcs toolbar.


3 WRITING YOUR OWN CALCULATIONS 3.1 Exercise 4: Calc Writing Basics

3.1.1 Design Brief In the following exercise we will show you how to write the following example calculation:

Ø Close all open documents and start a New Default Calc Sheet. Ø Most TEDDS paragraph styles are set so that spelling & grammar checking is not performed but at

this point it may be useful to turn off your Spell Checker and AutoCorrect options which can hinder you when writing formulae. Go to Tools\AutoCorrect and also Tools\ Option\Spelling & Grammar and un-check the options shown below:

Beam Design Beam Span & Loading Span; L = 3 m Dead load; DL = 0.5 kN/m Imposed load; IL = 0.4 kN/m Bending Moments: Simply Supported Factored load; wf = 1.6 × IL + 1.4 × DL = ?f2 kN/m Factored Moment; Mf = wf × L2 / 8 = ?f2 kNm Unfactored load; wu = IL + DL = ?f2 kN/m Unfactored Moment; Mu = wu × L2 / 8 = ?f2 kNm


3.1.2 4A - Defining Variables Ø Type the following Variable Definition lines in your calculation.

Take care to type the lines exactly as you see them above. Note the following:

• You must place the semi-colon after any text which precedes an expression (this is known as

a delimiter).

• Variable names are case-sensitive and cannot include spaces.

• Units are also case-sensitive (they are all listed in TEDDS Help) and should not include

spaces. TEDDS is dimensionally correct – if you use units you do not need to use conversion

factors. Units can be inserted by selecting View > Toolbars > TEDDS Imperial Units and

TEDDS Metric Units or you can type a superscript (for a power: as required in kN/m2) or a

subscript (for a name like py) by using the and buttons on the format toolbar. Click

the button, then type the character you want in Subscript or Superscript. Ensure you turn the

mode OFF immediately after this or you will enter all subsequent text in either Subscript or

Superscript.

• The equality symbol, = , is a special character: it tells TEDDS where there is a definition or

equation in the document.

• Other than this you can use as many spaces as or tab to layout the calculation.

Here is the general format of a variable definition line in TEDDS:

Imposed Load ; IL = 0.5 kN/m2

• No Variables will be defined until the expression has been calculated.

Beam Design Beam Span & Loading Span; L = 3 m Dead load; DL = 0.5 kN/m Imposed load; IL = 0.4 kN/m

Variable description (optional)

Delimiter

Variable Name

Equality symbol

Value

Unit


3.1.3 4B - Output Expressions We now wish to use the previous values in an expression to determine the factored line load on a beam. Ø Type the following text in your document below the text you have already written:

• Use the button for the name wf

• Note the case used – remember that variable names are case sensitive.

• Use the button to enter the multiply symbol or use a * but cannot use a lower-case x.

• You CANNOT omit mathematical operators and type 1.4DL for example.

• Enter a ? where you want the result of the equation to appear.

• The characters f2 will cause the result to be displayed fixed to 2 decimal places. If you emit

the format the default will be used, which is normally fixed to 3 decimal places.

• If your result has dimensions always use an output unit otherwise you may not get the answer

you expect! Remember units are case sensitive and are listed in TEDDS Help.

Here is the following general format for such an expression

Factored load ; wf = (1.6 × IL + 1.4 × DL) = ?f2 kN/m

Ø Now click the Calculate All button – this will cause TEDDS to store the Variables and calculate the

equation. You should find that the expression has been calculated and you now have a result:

Ø Amend all the input values by typing in different numbers for them. Note that typing by itself, does NOT update the result instantly. You must re-calculate to update the result values – do this and note the updated result.

Bending Moments: Simply Supported Factored load; wf = 1.6 × IL + 1.4 × DL = ?f2 kN/m

Bending Moments: Simply Supported Factored load; wf = 1.6 × IL + 1.4 × DL = 1.34 kN/m

Description (optional)

Delimiter

Variable Name (optional)

operators

parentheses (if required)

equality

result locator

result format

output unit

defined variable(s)


3.1.4 TEDDS Variables TEDDS calculations work by defining and using Variables:

Ø Click on the button on the TEDDS Toolbar to view the list of Variables defined so far:

Note that:

• The values displayed are in S.I. base units of Mass, Length, Time and Degrees. TEDDS can

convert these values into any known unit with comparable dimensions.

• TEDDS also uses the Dimension information to ensure that all calculations are dimensionally

correct.

• The variable list is stored in the variable file, which is unique to this document. Each TEDDS

for Word document has an associated variable file (.vbl).

Ø Select the System tab and examine these pre-defined Variables. To use any of these values in

your calculations simply use the variable name displayed (e.g. ES5950 for Young’s Modulus of Steel) Ø Click Cancel to close this dialog.


3.1.5 4C - Further Calculations

Ø Type the following text in the document below the existing text.

• DO NOT omit the semi-colons.

• Copy the text correctly noting the case and use of subscripts and superscripts. Use Copy and

Paste where possible to save typing and ensure your variable names are consistent.

• Use the button to type a power – remember to turn the mode off once you have finished.

• Remember – NO SPACES in variable names, units, or between the ? and the result format.

Other than this you can use as many spaces as or tabs to layout the calculation.

Ø When you are satisfied everything is correct, calculate the document to calculate these expressions and see the results. If you have made a mistake you will get an error message when TEDDS encounters it. The one below will be displayed if you omit a semi colon for example.

If you get such a message click the Interrupt button – TEDDS will stop where the problem is located and inform you on the page. Fix the problem and recalculate. Do not delete the error message – it will be removed automatically when the problem is resolved.

Bending Moments: Simply Supported Factored load; wf = 1.6 × IL + 1.4 × DL = ?f2 kN/m Factored Moment; Mf = wf × L2 / 8 = ?f2 kNm Unfactored load; wu = IL + DL = ?f2 kN/m Unfactored Moment; Mu = wu × L2 / 8 = ?f2 kNm


Undefined Variables Undefined Variables are errors and you should not get them if you write calculations correctly. They most commonly occur if you define variable incorrectly in an expression, by using the wrong case or Subscript for example.

Ø Once your calculation is working, recalculate a few times having changed some input Variables to

get the hang of this. When you have completed this exercise you should have the following:

Ø Save the calculation as “Beam Design.doc”.

Beam Design Beam Span & Loading Span; L = 3 m Dead load; DL = 0.5 kN/m Imposed load; IL = 0.4 kN/m Bending Moments: Simply Supported Factored load; wf = 1.6 × IL + 1.4 × DL = ?f2 kN/m Factored Moment; Mf = wf × L2 / 8 = ?f2 kNm Unfactored load; wu = IL + DL = ?f2 kN/m

2


3.2 Exercise 5: Enhancing Calculations

3.2.1 5A – Insert TEDDS Field Using the calculation created in the previous exercise we will replace the text below with Input Fields.

Ø Place the insert cursor at the end of the paragraph defining the Imposed Load and click Enter to

add a new paragraph.

Ø Click the Insert TEDDS Field button. Ø Using the Insert TEDDS Field window type in the information shown below:

Ø With the cursor on the newly inserted text, right-click & select Calculate Expression to calculate

just this paragraph. The Set Variable Value dialog box below should then be displayed:

Span; L = 3 m Dead load; DL = 0.5 kN/m Imposed load; IL = 0.4 kN/m


Ø Enter a value for the Span and click OK. Ø Use the Insert TEDDS Field window to add similar prompts for the dead load and the live load.

• There are buttons for specifying Greek text and subscripts for your Variable Names,

superscripts for your units and also to access the list of available units.

Ø You can now delete the original text defining the span and loading. Ø Select Calculate All and enter some new values and review the resulting values for combined

loading and moment.

Beam Design Beam Span & Loading ; Span; L = 5.00 m; ; Dead Load; DL = 0.60 kN/m;

; Imposed Load; IL = 0.50 kN/m; Bending Moments: Simply Supported Factored load; wf = 1.6 × IL + 1.4 × DL = 1.64 kN/m Factored Moment; Mf = wf × L2 / 8 = 5.13 kNm Unfactored load; wu = IL + DL = 1.10 kN/m Unfactored Moment; Mu = wu × L2 / 8 = 3.44 kNm


Viewing the Field that runs the input prompts Although you don't need to worry about it too much at this stage, it is instructive to look at the Field that actually defines the input box. The Field can be edited directly once you have revealed it although we will not cover such editing here. At the moment, you will mainly use this feature should you wish to delete a Field.

Ø Click the Show Field Codes button. Ø Look at your page and see that the following has been revealed:

The Field code that defines the input box appears at the beginning of the paragraph and is a Word Field denoted by bold braces. Note that you are just viewing the document in a different way - you have not changed anything Ø Click the Show Field Codes button again to show the field result. Ø Save your calculation document..

Beam Design Beam Span & Loading

{ =CSC|CALL Input("Span","L","m","",1) }; Span; L = {=CSC|?F2} m;


3.2.2 5B – Including TEDDS Data Lists To make your calculations easier to use TEDDS Data Lists can be used to add numerous Variables associated with an element such as a steel section size or rebar mesh. In this exercise we will use some Data Lists and further calculations to check a timber section under the loading defined in the previous examples. Ø Place the cursor on the page a paragraph below the last calculation Ø Select TEDDS > Launch > Engineering Data – Lists, Tables and Graphs.

Ø Execute the Timber Grade Stresses Data List followed by the Sawn Softwood Data List.

Ø Now Calculate the document, enter values for span and loading and you should find that the Data

Lists for timber sections and grade stresses are displayed.


Ø Choose a grade stress and a section that you think will suit the loading. The grade stress you chose and section should then be displayed in the document:

Ø Click the Variables button and you will see that all the properties of the section and grade stress

details have been have been added to the Variable list. Using Data List Variables Many Variables will have been added to the list and you may wish to display certain key values in the document. You could simply type the Variable name(s) followed by a question mark and the required unit but you must ensure that the Variable name is correct, including case and subscripts. An alternative is to Write Out the values from the Variables dialog: Ø Add a blank paragraph between the two Data List calls. Ø Place your cursor on this paragraph and click the Variables button again. Ø Select the Document tab. Scroll down the list and highlight σm:

Ø Click the Assignment option at the bottom of the dialog, and then click the Write Out button. The

Variable assignment will be placed in your document at the cursor position.

Use C16 timber (Table 8 BS5268:Pt 2:2002); σm = 5.30 N/mm2;

Try Sawn Softwood - Basic Size 200x200 ;

Use C16 timber (Table 8 BS5268:Pt 2:2002); Try Sawn Softwood - Basic Size 200x200 ;


Ø To ensure that the value displayed is updated when the calculation is re-calculated and an alternative section is chosen, replace the current value with a question mark and set the number format you require. Add some descriptive text if you want.

Ø Re-calculate the document to make sure that everything is working correctly. Repeat the procedure for the bending stress: Ø Place your cursor a paragraph below the call to the Sawn Softwood Data List. Ø Open the Variables dialog and select the Document tab. Ø Select Zxx Ø Select the Assignment option and click Write Out Ø Replace the current value with a question mark Ø Add some descriptive text is you want.

Ø Save the calculations as “Timber Beam Design.doc”.

Try Sawn Softwood - Basic Size 200x200 ; Allowable Bending Stress; σm = ?f2 N/mm2;

Use C16 timber (Table 8 BS5268:Pt 2:2002); Section Modulus; Zxx = ?f2 cm3;

Try Sawn Softwood - Basic Size 200x200 ; Allowable Bending Stress; σm = ?f2 N/mm2;

Use C16 timber (Table 8 BS5268:Pt 2:2002);


3.2.3 5C – Output Fields We can use Insert TEDDS Field to provide information on the calculation, such as key values, pass or fail status and simple text messages. This information can be displayed either as a message box (Message), text in the document (Show) or in the Progress Log (Log). In all cases the information will be included in the Progress Log. Message Fields Our calculation would be greatly improved if we knew the actual stress in the member before we select a grade stress. Ø Add a few more blank paragraphs above the call to the timber properties Data List. Ø Type the following calculation.

Tip: you can use Copy & Paste for the Mu and σm and there is a toolbar for Greek characters. Ø Place your cursor on the paragraph below this formula and then click the Insert TEDDS Field

button. Choose the Message tab, select the Value of Variable Statement type and fill in the details as shown below:

Use C16 timber (Table 8 BS5268:Pt 2:2002); Allowable Bending Stress; σm = ?f2 N/mm2; Required Section Modulus; Zreq = Mu / σm = ?f2 cm3;

Try Sawn Softwood - Basic Size 200x200 ;

Section Modulus; Zxx = ?f2 cm3;


Ø When you run the calculation you will now see a message similar to the one shown below.

Ø Click OK to close the message box and you will see that the message has also appeared in the

Progress Log.

Ø Choose a suitable section size from the timber properties Data List.


Progress Log Fields We can also display information and instructions in the Progress Log. Ø Place the cursor on the paragraph below the call for the message and then click the Insert TEDDS

Field button again. Choose the Log tab, select the Simple Statement type and fill in the details as shown below:

Ø Re-calculate the document and you should get the following information in the Progress Log.


Show Fields We will now add some text to the document to show whether the section we have selected would pass to bending check or not. Ø Place your cursor on a new paragraph at the very end of the calculations and then click the Insert

TEDDS Field button again. Choose the Show tab, select the Condition Statement type and fill in the details as shown below:

Ø Calculate the document a few times to check it works correctly.


3.2.4 5D – Formatting Your Calculations You can use the in-built paragraph styles to improve the look of your calculation. Ø Place your cursor on the paragraph that reports whether the bending check passes. Ø Pick the Output Style from the TEDDS Format toolbar. The text should now appear in italics and

justified to the right.

Ø Apply paragraph styles to the other lines if you wish. We recommend you use Calc Heading, Calc

3 Column Heading, Calc 3 Column and Output.

3.2.5 Tidying and Saving Your Calculation Before saving your calculation for re-use later or if you intend to save it in a User Library you may wish to remove the current values from both the Variables list and the document itself. Ø Open the Variables dialog and click Delete All to remove the Variables. Ø Select View > Toolbars > TEDDS Utilities. Click on the Remove Field Results button which will

remove the current results from the page. Ø Save the document as “Timber Beam Design.doc”.


3.2.6 5E – Including Data Tables Data Tables can be added to your calculation from the Library Access System, as you did with Data Lists, or via the Insert TEDDS Field. We will now write a calculation for checking a steel beam and use the second method to include the safe load table for Universal Beams in bending. Ø Open your original “Beam Design.doc” document so that you’re a left with the text shown below:

Ø Save the document as “Steel Beam Design.doc”. Ø Add the following paragraph below the existing calculations.

Ø Add a Log Field that will display the Factored Moment in the Progress Log.

Steel Checks Effective Length; Le = L = ?f2 m

Beam Design Beam Span & Loading ; Span; L = 5.00 m; ; Dead Load; DL = 0.60 kN/m; ; Imposed Load; IL = 0.50 kN/m; Bending Moments: Simply Supported Factored load; wf = 1.6 × IL + 1.4 × DL = 1.64 kN/m Factored Moment; Mf = wf × L2 / 8 = 5.13 kNm Unfactored load; wu = IL + DL = 1.10 kN/m Unfactored Moment; Mu = wu × L2 / 8 = 3.44 kNm


Ø Place your cursor at the paragraph below this call and click the Insert TEDDS Field button. Choose the Data Table tab, select the UbMb275.tbl, fill in the details as shown below then click OK.

Ø Click Calculate All and enter some new values for the beam span and loading. When the Data

Table is displayed you will see that it interpolates the value for the effective length and you just need to select a section size with sufficient moment capacity.

Ø Place the cursor on the paragraph after the call for the Data Table and then type the following to

display the value of buckling resistance that has been returned from the Data Table

Steel Checks Effective Length; Le = L = ?f2 m;; Try (Grade S275) UB 254 x 102 x 22; Buckling Resistance Moment; Mb = ?f2 kNm


Ø Now add a Show Field to display whether the section passes the bending check.

Ø Calculate the document to check that it works. Ø Use the Progress Log and the Interpolate button to help find a suitable section

3.2.7 Tidying and Saving Your Calculation Ø Use the paragraph styles to format the text. Ø Open the Variable Manager and click Delete All to remove the Variables. Ø Select View > Toolbars > TEDDS Utilities. Click on the Remove Field Results button which will

remove the current results from the document. Ø Save the document as “Steel Beam Design.doc”.

Steel Checks Effective Length; Le = L = 5.45 m;; Try (Grade S275) UB 457 x 191 x 82; Buckling Resistance Moment; Mb = 239.50 kNm

Bending Check - Pass;


3.3 Exercise 6: Using the Library Access System

3.3.1 Understanding the TEDDS Library Access System The best way to store your calculations is to save them in a TEDDS Library. In this exercise you will learn how the Library Access System stores information and to create and edit your own Indexes, Sets, Groups and Items. The Library Access System can be configured to be used in one of two modes:

• Simple Menus – You are only retrieving items from the library, this is the default mode.

• Advanced Menus – You are able to add Items to and remove them from your own Libraries.

The Library Access System utilises two separate components to allow you to locate and use an Entry in any library quickly and easily:

• Calculation Libraries (referred to as Calc Libraries).

• Calculation Sets (referred to as Calc Sets)

Understanding Libraries Libraries are the actual place where calculations, sketches, tables etc. are stored, as Entries. These files have an .LBR extension. Understanding Sets When you launch the Library Access System you see the various calculations divided into Sets. You can think of a Set as an index to the Library Entries. These files have a .LAS extension. Sets contain two types of components Items and Groups. Items are links to a particular Entry and are the component of the Set that you select in order to execute a calculation to the document. Groups organize the Items in the set into a logical order to make them easy for you to find. Different Sets can access the same library entries so that the data only need to be stored once. User Libraries and Sets To save calculations in the Library Access System you need to create your own Sets and Libraries.


3.3.2 6A – Saving Calculations in the Library Access System

Ø Open “Timber Beam Design.doc”. Ø Launch the Library Access System and select View > Advanced Menus. Ø Select File > New to launch the New Calc Set Wizard, click next and you will see the interface

shown below. Ø Enter a name for your Calc Set e.g. “Company Calcs”.

Ø Accept the Properties but notice that the Calc Library has been given the same name as the Calc

Set; you can change this if you want to.


Ø Click Next and you should now have an empty Calc Set.

Ø To create a Group, click on the New Group button. Ø Give the Group a name e.g. “Beam Designs” and add a more detailed long name is you want. You

can toggle between the short name and long name in the Library Access System.

Ø To create an Item, click on the New Item button. Click OK and you will be prompted to select your

calculation.

Ø In the Timber Beam Design document, highlight the entire calculation. Then click on OK. Ø Give your Item a name e.g. “Timber Beam”, note the Calc Library which the entry will be saved in.

Ø Click on OK to the message “Add new item inside currently selected group?”


You should now have an Item inside your Group and the calculation has been saved in the Calc Library.

Ø Click the Preview button on the LAS toolbar to see what you have saved.


Ø Repeat these steps for the Steel Beam calculation.

Ø Click the Save button or choose File>Save to save the Calc Set. Ø Give the Calc Set a file name e.g. “Company Calcs.las” and click OK.


Using Your Calculations – in TEDDS for Word Ø Open a New Default Calc Sheet and Execute and Calculate one or both of your designs. Ø Click the Index button to return to the Library Access System Index. Ø Choose My Calcs from the drop down list and your saved calculations should be displayed.

Using Your Calculations – in TEDDS By adding your calculation to the Library Access System you have also made it available from the Calc Wizard in TEDDS (without Word) Ø Close TEDDS for Word and open TEDDS. Ø Pick the My Calcs option from the Calc Wizard and select the Steel Beam and you will see your

calculation in the Information preview. Ø Click the Calculate button and run the calculation.


3.3.3 6B – Using the Calc Item function in the Insert TEDDS Field The Insert TEDDS Field can be used to build a CALL to calculate an Item from a Calc Library. Ø Open TEDDS for Word and a New Default Calc Sheet. Ø Create the Input Statement shown below.

Ø Press the Enter key to take the cursor to the next paragraph and then click the Insert TEDDS

Field button again and choose the Calc Item tab and fill in the details shown below.

Ø If you now run the calculation if you choose 1 it will run the steel beam design and if you choose 2

(or anything other than 1) it will run the timber beam design.


4 TEDDS UTILITIES 4.1 Exercise 7: Beam Analysis The Beam Analysis utility can be used to calculate bending moments, shear forces, reactions etc. The Beam Analysis can be used to model continuous beams, simply supported beams and cantilevers. The Beam Analysis will elastically analyse the beam defined under the specified loads. Analysis is by the stiffness matrix method for statically indeterminate beam; hence values are required for the properties of the beam. In the above example (any material) nominal values are used. The Analysis can also be configured to design a beam in a specific material using a specific section. Library items are included to automatically configure common engineering materials and sections. There is also a Rolling Load variant of the calculation. This allows you to set up multiple moving loads on a multi-span continuous beam. See the Notes for this calculation in the Library for more information.

4.1.1 Generic Beams Ø Open a New Default Calc Sheet. Ø Launch the Library Access System. Ø Execute the following calculation into your document.

Ø Click the ‘Calculate All’ button. Ø Note the options available for types of beam. Choose Generic analysis (I & A defend) and click

Next.


Beam Geometry You will see the interface for the Continuous Beam Geometry which you can use to define the type of beam i.e. – Fixed end, cantilever, the stiffness of each span, how many spans and the length of spans.

Ø Click the Length text box and input 3000 or 3m. Note the units are in mm. Ø Click on the ‘+ Add Span’ button twice to increase the number of spans, you can then alter the

span lengths to 5000mm and 3000mm as shown above. Ø Restrain the first support vertically and rotationally and the drawing will show a

fixed end, then free the last support vertically and rotationally and you will get a cantilever. Ø Click Next and you will see the loads interface.


Beam Loading

Ø Highlight Beam in the selection area on the left hand side. Add a Full UDL of 5kN/m to apply this

load to all the spans. Ø Within the Beam loading there is an option for self weight, which is calculated by multiplying the

density by the area by a factor. Add a load and select Self Weight and Factor = 1. Span Loading

Ø Now select Span 2 in the selection area. Ø Click the + Add Load and create a UDL live load of 2kN/m starting at 1000mm and ending at

3500mm as shown above. Ø Click Next to view the interface for combinations.


Load Combinations Ø Click into the text box Desc: and give the load combination a name e.g. Dead + Live. Leave the

default settings of 1.4 × Dead and 1.6 × Live. Ø Click the + Add Combination button and give it the name Unfactored Live. Set the Live factors to

1.0 and all the others to zero.

Ø Click on the Patterns button and you can create pattern loading.

Ø You can change the applied load factors and alter the pattern by clicking on the check boxes.

When you click OK it creates the combinations, all you need to do then is give them a name. However we will leave you to experiment with this another time so click Cancel.

Ø Click Next to view the output options interface.


Output Options • The Beam Results give the worst load effects anywhere along the beam.

• The Span Results give the worst effects on each span, in which case detailed results are also available which give the locations of the worst load effects, and the values of shear, moment and deflection at regular intervals along each span.

Ø Check the boxes for the results you require or click Finish to accept the defaults. The specified results will be included in your document.


4.1.2 Specific Sections and Materials. Ø Open a New Default Calc Sheet, launch the Library Access System and execute the Beam

Analysis calc again. Ø Calculate All and this time choose Steel Beam (BS5950) and specify a 457x191 UB 74 steel

beam.

Ø Enter the Length of Span 1 as 6500 mm or 6.5 m. Ø Look at the I, A, Young’s Modulus and Density values and note how these correspond to the serial

size we selected and Steel to BS5950 Ø Add the following Beam Load:

Self weight Dead Factor 1.0 Full UDL Dead 35 kN/m Full UDL Live 23 kN/m

Ø Give the default combination a title such as ULS Ø Select Output you would like displayed and click Finish. Ø Examine your results.


4.2 Exercise 8: Section Properties Tool.

4.2.1 Overview The Section Properties Tool (SPT) allows you to define a section shape from any number of simple geometric shapes (including holes if necessary).

• The SPT will calculate the properties of the overall section based on the shapes it contains. These properties will be returned to your TEDDS document as Variables ready for you to use in subsequent calculations.

• It will also return the details of the geometric shapes and holes which make up the overall section to your document as variables. The overall section can thus be recreated by the Section Properties Tool when you recalculate this part of your document.

• You can model any shape you like as long it is formed by a combination of Rectangles, Circles and/or Triangles.

• You can also recall any existing sections from the TEDDS Data Lists, automatically converting these into the geometric shapes required by the Section Properties tool.


4.2.2 Notes from the Library Access System

Scope • These calculations run the Section Properties Tool. • The output from the Section Properties Tool that is to be returned to the document may be

selected. • In addition to running the Section Properties Tool, the calculations allow the selection of one of

two samples of using variables to drive the shape created in the section properties tool. The first example allows the parameters of an I section to be entered, and the shape is drawn automatically. The second example allows the parameters of a standard rectangle, circle or triangle to be entered and the shape is drawn automatically.

Details of the Section Properties Tool • The Section Properties Tool allows the generation of section properties from rectangles,

triangles and circles, with or without holes. • The shape properties and all its variables are returned to the TEDDS document for use in

calculations. • Custom shapes can be created and saved away for re-use at a later date. • Existing Data Lists can be used to import shapes either as a starting point for new shapes or to

create combinations of shapes (such as a channel on an I section). Data Lists are available for the UK, USA, Canada, Japan, Singapore and Australian sections.

Limitations/Assumptions • The plastic section modulus is only calculated for rectangular shapes at angles of 90 degrees to

the principal axes. Results The properties calculated are:

• Area • 2nd moment of area • Radius of gyration • Plastic section modulus • Distance to combined centroid • Distance to equal axis area (only shapes with all rectangles at 90 degrees) • Elastic section modulus

A sketch of the shape for which the properties are calculated can be returned to the document.

4.2.3 Pre-Defining SPT Shapes It is possible to predefine a section before running the SPT. Each shape needs the following variables: Type 1 rectangle, 2 Triangle, 3 Circle. HoleType 0 No hole. density material density. d length. theta rotation angle. T thickness. mr modular ratio. D diameter of circle. Cxx distance to centroid from x-axis. Cyy distance to centroid from y-axis.


4.2.4 Exercise Aims To understand how the section properties tool works including how to:

• Incorporate a Section Properties call in your calculations

• How to create sections

• Use pre-defined shapes

• Storing sections for future use

We will create the following shape using the Section Property Tool:

NOTE: A simple approach has been adopted in mapping pre-defined sections into shapes known to the Section Property Tool. For example channel sections with tapered flanges are mapped to three rectangles, ignoring the taper of the flange and the root and toe radii completely. You should check the adequacy of this approach whenever you use pre-defined sections.

4.2.5 Launch the Section Property Tool Ø Open a New Default Calc Sheet in TEDDS for Word. Ø Open the Section Properties calculations folder Ø Execute the Section properties calculator to the page.

Ø Click Calculate All


This will now start the Section Property Tool.

Ø Choose Full Results, Output section shape and Size of drawing canvas = 2m x 1.5m. If your section is larger than 2m x 1.5m you should select a larger canvas. Ø Click Next to continue. The following SPT screen should appear:


4.2.6 Adding Pre-Defined Shape The first section we are going to add is from the pre-defined library Ø Select Insert > Predefined Shape…

Ø Select UK + European (hot) and click OK. Ø Select Rolled Steel Channels (Parallel) Ø Select a 230 x 90 x 32 section Ø Click Select. The section will be placed on the canvas and your screen should now be similar to the one shown below:


4.2.7 Copying & Rotating The next step is to enter the same shape again and then rotate it through 1800. This can be achieved in two ways; either insert the section from the predefined shapes Data List as before or by Copy & Paste. We will use the second method for the exercise. Ø Click on the shape to select it Ø Select Edit > Copy Ø Select Edit > Paste. This will now paste a copy of the shape onto the canvas. With this shape

selected we will rotate it.

Ø Select the Rotate Tool button Ø Position the cursor over a the shape Ø The rotate button will appear. Ø Hold the left mouse button down and move the mouse in a clockwise direction (or anticlockwise) Ø When you have rotated the object through 1800 release the mouse button. Your screen should now

be similar to the one below:

4.2.8 Moving and Snapping Shapes Together We will now move the second shape and join it to the first shape.

Ø Click on the Select button Ø Select the Second shape Ø Drag the shape to the approximate location – but this is not accurate enough. Ø Hold down the Shift button and click on the First shape The First shape will now have grey selection boxes surrounding it; the Second shape will have white boxes surrounding it. We will now snap the two shapes together. This will be achieved by moving the First shape to join up with the Second shape.


Ø Select the Snap Objects button . Ø The following dialogue box will appear:

Ø Select the following button . This will move the object with the grey selection boxes to the right of the object with the white selection boxes.

Ø Select Centre from the Alignment options. This will align the two objects using their centre selection boxes.

Ø Click on OK. This will now snap the two objects together.

4.2.9 Grouping Shapes To make the next stage easier we will now combine the two objects into one.

Ø Select the Group button . The combined shapes will be treated as a single composite shape. If you need to edit the individual shape components use the UnGroup button.

4.2.10 Insert a User Defined Shape We will now add a flat bar along the top of our existing shape. Ø Select Insert > Rectangular Shape… Ø The following screen will appear, enter the values as shown and click OK.


4.2.11 Snapping Shapes Together The next stage is to snap this shape to the existing one. Ø Select the new rectangle and the grouped shape

Ø Select the Snap Objects button Ø Select the appropriate button to snap the grey object to the white. Ø Select Centre from the Align option Ø Click on OK Ø Select the Group button to group the shapes together. This will now have grouped the shape into one item, as shown below:

4.2.12 Positioning the Shape The Section Properties Tool gives the co-ordinates of a shape's combined centroid and the intersection of the X and Y equal area axes relative to the origin of the coordinate system (0,0). Obviously, these values are only of any use if we know the position of at least one point on our section relative to this origin! It is therefore sensible to accurately position a convenient point on our section relative to the origin. Ø Select Edit>Align Section to Global Origin…


Ø Choose a suitable origin point.

Ø Select the Zoom to Fit button to maximise the sketch on in the window. This will also ensure that a reasonable sketch will be return to the TEDDS page.

4.2.13 Viewing the Section Properties

Ø Select the Show Properties button . You can view the Variable names by clicking .


4.2.14 Storing the Section The Section Properties Tool has its own generic file format that allows you to save the current section in its own file. This means that you can build up a library of custom shapes. Ø Select File > Save As… and give the file a name such as B2B Channels + plate1.SPT Ø Click on Save. To recall the shape in the future simply run the SPT and open this file.

4.2.15 Returning Section Details to the Document To return the calculated properties to TEDDS

Ø Select the Copy To Calcs button This will now return you back to your document and the results of the calculated section properties will be displayed on the page for you.

You can ‘re-generate the shape in the SPT by either re-calculating the document or by running the section properties calculator in an new document and opening the SPT file saved earlier.

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