Specialist Diploma in M&E Co-ordination Drawing

(ME 105)

Ng Wan Yuen

email : ngwanyuen@live.com.sg

Course Content

Principles of Co-ordination works

Methods of Co-ordination

Preparing services co-ordination plan

Preparing sectional view drawing

Preparing reflected ceiling plan

Case study exercises

Architectural

Electrical

HVAC

FPS

Structural

Mechanical

Principle of Co-ordination work

It is the inter-relation between design and installation of building

services in such a manner as to permit practical, economic and aesthetic

installation within the building structure

Factors for Consideration

Regulation

Constrains

Maintenance

& servicing

Access

requirement

Ceiling

space

Layout

Co-ordination is important and required

There are multiple services

There is a positional relationship between the services

Installation or ceiling space is usually limited

Consideration must be given to access and maintenance

To avoid clashes between services

Methods of Co-ordination

Sequential Design

Arch &

Structure

Layout

Sanitary

Layout Duct

Work

HVAC

Piping FPS

Piping

Elect &

Others

Is a multi-disciplinary effort with input from many

people and requires many revisions

Less Clashes

- Each designer is fully aware

of other services which may

otherwise clash

Time Consuming

- Need longer time to complete

the services design

Overlay method Is an iterative process of sequentially overlaying

multi drawings of various trades

2400

5400

ARCHITECTURAL LAYOUT PLAN

2400

5400

300 x 5

00

300 x 5

00

400 x 800

STRUCTURAL PLAN2400

5400

MVAC LAYOUT PLA N

VCD

200x3

00 SA

D

1100x3

00 R

AD

300x3

00 SA

D

1000x3

00 R

AD

1100x300 RAD

450x3

00 SA

D

2400

5400

FIRE SPRINKLER LAYOUT PLAN

100

100

80

25 25 25 25

25 25

25 25 25

25 25 25

25

25

25 25

25

2400

5400

500mm CABLE TRAY

800m

m C

ABLE

TRAY

ELECTRICAL & LI GHTING PLAN

500mm CABLE TRAY

500mm CABLE TRAY

24

00

54

00

24

00

54

00

30

0 x

5

00

30

0 x

5

00

400 x 800

24

00

54

00

10

01

00

80

25 25 25 25

25 25

25 25 25

25 25 25

25

25

25 25

25

24

00

54

00

VC

D

20

0x

30

0 S

AD

11

00

x3

00

R

AD

30

0x

30

0 S

AD

10

00

x3

00

R

AD

1100x300 RAD

45

0x

30

0 S

AD

24

00

54

00

500mm CABLE TRAY

80

0m

m C

AB

LE

T

RA

Y

500mm CABLE TRAY

500mm CABLE TRAY

Save Time

- It allows for design of each

service to proceed concurrently

Major Clashes

- May require major revamp of

the services routing

Scale Model

By constructing of a scale model to visual the

actual installation space requirement

Mock up

- In project which have standard

layout for every storey

Costly

- It could be costly and time

consuming

Consideration during

Preparation of drawing

Bottom Layer

Layer 4

Layer 3

Layer 2

Service Layer Arrangement

Top Layer

Smoke extraction

Fire rate duct and pipes

Concealed sprinklers

Sanitary pipes

Rain water pipes

MV/AC duct

Chilled water pipes

Condenser water pipe

Communication cable

Power cable

Domestic water and Gas

pipes

Exposed sprinklers

Light fittings

Smoke / Heat detector

Speakers

General guideline for services arrangement above ceiling

Design Criteria

Support

System Insulation Gradient Clearance

Space reserved

for standard

support systems

for components

Insulation for Fire

protection, thermal

energy conservation,

sound isolation,

personnel

protection, etc

Gravity driven

lines e.g. plumbing

and sanitary lines

Clearance to

prevent heat

exchange and

mitigate vibration

concerns, etc

High

Low

Apply design knowledge to assure that the systems satisfy

performance requirement and comply to standards

Construction

Installation

Space

Installation

Sequence Lead Time

Component B should not

be located within

installation space of

component A

Component A and B

should be installed before

component C

Component Cs lead time is greater than component

A and B, therefore it

should be located below

them

A B

A B

C

A

B

C

Apply construction knowledge to assure feasible designs

and increase the efficiency for building systems

Operation and Maintenance

Access Space Access Frequency

Component B should be located

within access space of component A

Component B has greater access

frequency requirements then component

A and therefore should be located below

component A

A BA

B

Apply maintenance knowledge to minimize the cost of

operation and maintenance

Understand the basic principle

for adjusting the services

during co-ordination

Ductwork and Chilled Water Pipe

o Consider converting a round duct to rectangular duct or

vice versa (refer to the conversion table). The aspect ratio of a

rectangular duct should not be more than 5

W/H

o FCUs and AHUs are to be installed in the false ceiling. In such

cases, adequate maintenance space shall be provided

o For ceiling suspended AHUs, it may require to construct catwalk

around the equipment

o If noise is a concern, FCU, AHU or ventilation fan may be

enclosed in acoustic enclosure

FCUs and AHUs

Sanitary and Rain Water Pipe

o Pipe to be installed with a gradient

o Pipe carries condensate water from air-conditioning equipment

to be insulated with external insulation as in the case of

chilled water pipe

o Pipe should not be installed above dining area, bedroom. When

allowed by authority, a tray or double slab shall be provided to

prevent leakage onto the space below

o Ceiling access opening shall be provided for the inspection of

floor trap

Sprinklers and Sprinkler Pipes

o Installed according to CP 52 (ordinary hazard group)

- max spacing is 4m

- max area of coverage is 12m sq

o Obstructions having a width > 800mm would require

additional sprinklers underneath the obstruction

o Sprinkler guard should be installed at low headroom area

Electrical and Data Services

o Avoid putting electrical tray / trunking under water pipes

o Preferable near to ceiling level for easy access and pulling of

cable

o Max height for conduit for horizontal DATA cabling shall not

exceed 3.3m from floor level

o Min clearance of 50mm between DATA tray and any services

above it

o Space between DATA tray and false ceiling shall be between

75mm and 150mm

Important Points To Note When

Preparing Co-ordination Plan

Services are clearly labeled

Indicate dimension of services

Indicate dimension of space requirement in sectional drawing

Indicate services level eg. BOTxxxx

Indicate distance / spacing between ceiling terminal units to ceiling grid

Services are drawn to scale and provide Legend

Services on plan to tally with sectional drawing

Do not use single line to indicate services

The purpose of preparing Sectional View Drawing

o Ensure all services are coordinated at congested area

o Ensure all parties are aware of the exact location of their services

o To achieve ceiling height requirement

The purpose of preparing Reflected Ceiling Plan

o Ensure aesthetically pleasant ceiling layout

o Ensure ceiling terminal units are properly coordinated and

installed correctly

We are ready for the drawings !!!

Getting start Step 1 (approx. 5 mins)

o transfer structure plan onto Arch plan

o Indicate the dimension and color them

Step 2 (approx. 30 ~ 40 mins)

o Identify clashes area and prepare sectional view drawing

o Indicate the level and relative position of services, label and

dimension of services

Step 3 (approx. 10 mins)

o Transfer sprinkler plan onto Arch plan

o Indicate the size (dia) and color them

Step 4 (approx. 20 mins)

o Transfer ACMV plan onto Arch plan

o Indicate duct, pipe size and color them

Step 5 (approx. 10 mins)

o Transfer electrical & lighting plan onto Arch plan

o Indicate the size of cable tray and color them

Step 6 (approx. 5 mins)

o Written question (consideration for the above changes)

Service Corridor

Basement Carpark

Retail Shop

Case Study Exercise

Circular equivalent diameter - de (mm)

Duct

side - a

mm

Duct side - b (mm)

100 150 200 250 300 400 500 600 800 1000 1200 1400 1600 1800 2000

100 109 133 152 168 183 207 227

150 133 164 189 210 229 261 287 310

200 152 189 219 244 266 305 337 365

250 168 210 246 273 299 343 381 414 470

300 183 229 266 299 328 378 420 457 520 574

400 207 260 305 343 378 437 488 531 609 674 731

500 227 287 337 381 420 488 547 598 687 762 827 886

600 310 365 414 457 531 598 656 755 840 914 980 1041

800 414 470 520 609 687 755 875 976 1066 1146 1219 1286

1000 517 574 674 762 840 976 1093 1196 1289 1373 1451 1523

1200 620 731 827 914 1066 1196 1312 1416 1511 1598 1680

1400 781 886 980 1146 1289 1416 1530 1635 1732 1822

1600 939 1041 1219 1373 1511 1635 1749 1854 1952

1800 1096 1286 1451 1598 1732 1854 1968 2073

2000 1523 1680 1822 1952 2073 2186

Equivalent diameters for some common mm rectangular dimensions are shown in

the table below: