Part 3 of BS EN By Brian Whorlow BA Hons, IEng, FCIPHE. Consultant, training course presenter and technical author. Canterbury, UK. Roof Drainage Calculations to BS EN Gravity drainage systems inside buildings – Part 3: Roof drainage layout and calculation. Rainfall Intensity. BS EN Gravity Drainage Systems Inside Buildings – Part 3: Roof Drainage, Layout and Calculation.
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Flat Roofs For flat roofs the design head of water has been taken as 35mm The catchment area is given for outlets with and without gravel guards. Find Similar Items This product falls into the following categories.
The roof area shown in the tables is based on outlets with no gratings or guards. You may experience issues viewing this site in Internet Explorer 9, 10 or This website is best viewed with browser version of eb to Microsoft Internet Explorer 8 or Firefox 3. As an aid bx have chosen a selection of towns throughout the UK, and determined the design rainfall intensity for each town as follows: The gutter shapes and sizes shown below have been used in the preparation of the tables.
Systeme d’evacuation des eaux pluviales, conception et calculs. Your basket is empty. The catchment area is given for outlets with and without gravel guards. Parapet or Eaves Gutter Pitch.
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Although the depth of the gutter rn most effect on bx catchment area, if the gutter size or shape varies significantly from that shown below then a separate calculation will be required. Search all products by.
If the allowable area is greater than the actual area then the gutter system is satisfactory. Dachentwaesserung, Planung und Bemessung. Use of Tables To use the tables: Calculate the actual area drained from the equations given below.
For flat roofs the design head of water has been taken as 35mm. Sign up for our monthly news letter.
For the UK, the maps in the standard show the intensity for various return periods from 1 year to years. Worldwide Standards We can source any standard from anywhere in the world.
Return period of 4. Pitched roofs The catchment area has to be multiplied by the pitch factor to obtain the allowable area drained.
Roof Drainage Calculations – Notes
Compare the actual area drained with the allowable area drained. Nominally Level Freely discharging maximum flow capacity. For eaves gutters only the results for straight outlets are shown.
Reseaux d’evacuation gravitaire a l’interieur des batiments.
If there is a town or towns that you would like to be included bss let us know Gutter Types The gutter shapes and sizes shown below have been used in the preparation of the tables. Systeme d’evacuation des eaux pluviales, conception et calculs Title in German Schwerkraftenwaesserungsanlagen innerhalb 12056–3 Gebaeuden.
To use the tables: Water supply and waste systems buildingsWaste-water drainage, Drainage, Buildings, Rainwater control systems, Layout, Mathematical calculations, Gutters, Rainwater pipes, Hydraulic tests, Performance testing. Where a wall or walls drain on to the roof, for example from a higher building, then more detailed analysis of the catchment area is required. For other design rainfall intensities separate calculations will be required.
Determine the ne of gutter required, based on the distance between outlets Calculate the allowable area drained by multiplying the catchment area by the pitch factor. Click to learn more.
BS EN 12056-3:2000
The catchment area given in the tables is based on the least of: Schwerkraftenwaesserungsanlagen innerhalb von Gebaeuden. For square outlets separate calculations will be required. The standard also gives four categories of design rainfall intensity. Customers who bought this product also bought BS EN The effect of introducing gratings or guards is to reduce the catchment area by up to half.
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