slot block wind speed calculations
TRANSCRIPT
SLOT BLOCK WIND SPEED CALCULATIONSWind Guide
LW.LH/10.21
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Slot Block Stability Calculation
Introduction ..............................................................................................................................................................3
General Assumptions .............................................................................................................................................3
Design Wind Speed Factors & Constraints .......................................................................................................3
Calculate Stabilising Movement ....................................................................................................................... 4-5
Conclusion .................................................................................................................................................................5
Appendix ....................................................................................................................................................................6
Disclaimer & Copyright
Disclaimer ..................................................................................................................................................................7
Copyright ...................................................................................................................................................................7
Contents
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Slot Block Stability Calculation
Introduction
General assumptions
Design wind speed factors &constants (in accordance with CP3:Chapter V:Part2)
Slot Block is a water filled barrier designed to hold a standard fence panel. The barrier has been wind tested by MIRA to 'withstand 57 mph'.
This calculation has been commissioned to establish the maximum wind speed mathematically and to compare it to the experimental value.
The calculation will be carried out to : BSI Code of Practice CP3 - Code of Basic data for the design of buildings, Chapter V - Loadings, Part 2 - Wind.
Weights and dimensions of the Slot Block base are taken from the Site Supplies Direct Ltd website and have been confirmed from detailed drawings of the base.
Weights and dimensions of the fence panels are taken from information supplied by Heras. See Appendix.Note: the difference in fence weight and construction has a negligible effect on the design wind speed calculation. A round top panel has been considered in this calculation as this is shown in the images from MIRA wind tunnel tests. See Appendix.
Panels are installed vertically upright on firm ground.The calculation assumes a single panel but applies equally to multiple panels in a straight line configuration.
g Acceleration due to gravity 9.81 m/s2
The calculation is used to establish a design wind speed, Vs.
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Slot Block Stability Calculation
Conclusion
There is a good correlation between the theoretical calculation and the experimental result.
Our calculation has estimated that the barrier will fall over at a design wind speed of 58mph.
It is our understanding that the tests conducted at MIRA showed the panels to blow over at 57mph.
From these calculations and the wind tunnel tests it has been demonstrated that the supports, when installed as per the general assumptions on page 2, will remain standing in constant wind speeds up to 57mph.
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Disclaimer & Copyright
Disclaimer Whilst Generation (UK) Ltd has taken every reasonable effort to ensure the information contained within this publication is correct and complete at the time of printing, you should be aware that there will be periodical changes and Generation (UK) Ltd does not accept any liability for any inconvenience, loss or damage caused as a result of any inaccuracy or omission within this publication.
CopyrightNo unauthorised reproduction of any images, text or other matter contained herein is permitted. All rights are expressly reserved, including copyright, design right, moral and patent rights (where applicable). We reserve the right to take legal action in respect of any infringement of said rights.
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