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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Customers who bought this product also bought BS EN Where your project is not near one on the towns chosen, then separate calculation will again be required.
BS EN 12056-3:2000
Take the smart route to manage medical device compliance. Your basket is empty. Pitched roofs The catchment area has to be multiplied by the pitch factor to obtain the allowable area drained.
Learn more about the cookies we use and how to change your settings. The diagrams below shown the size and types of outlets shown in the tables, if other sizes or types are to be used then separate calculations will be required. The faster, easier way to work with standards.
Check out our web directory of the UK roofing and cladding industry www. Water supply and waste systems buildingsWaste-water drainage, Drainage, Buildings, Rainwater control systems, Layout, Mathematical calculations, Gutters, Rainwater pipes, Hydraulic tests, Performance testing.
Calculate the actual area drained from the equations given below. Note the previous standard gave rainfall intensity figures in mm per hour per square meter for 2 minute storm event. Worldwide Standards We can source any standard from anywhere in the world. You may experience issues viewing this site in Internet Explorer 9, 10 or For flat roofs the design head of water has been taken as 35mm.
Dachentwaesserung, Planung und Bemessung. Roof drainage, layout and calculation Status: The catchment area is given for outlets with and without gravel guards. 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. Parapet or Eaves Gutter Pitch. Schwerkraftenwaesserungsanlagen innerhalb von Gebaeuden.
Flat Roofs The 12056- area can be taken as the allowable area drained. Systeme d’evacuation des eaux pluviales, conception et calculs. Sign up for our monthly news letter. Return period of 4. Catchment Area The catchment area given in the tables is based on the least of: The calculated capacity is based on the gutter being: To use the tables: This website is best viewed with browser version of up to Microsoft Internet Explorer 8 or Firefox 3.
Return period of 1. Systeme d’evacuation des eaux pluviales, conception et calculs Title in German Schwerkraftenwaesserungsanlagen innerhalb von Gebaeuden. 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. Determine the depth of gutter required, based on the bw between outlets Calculate the allowable area drained by multiplying the catchment area by the pitch factor.
The effect of introducing gratings or guards is to reduce the catchment area by gs to half. If there is eh town or towns that you would like to be included please let us know Gutter Types The gutter shapes and sizes shown below have been used in the preparation of the tables. For square outlets separate calculations will be required.
Find Similar Items This product falls into the following categories. As an aid we have chosen a selection of towns throughout the UK, and determined the design rainfall intensity for each town as follows: For the UK, the maps in the standard show the intensity for various return periods from 1 year to years.
Roof Drainage Calculations – Notes
If there is a town or towns that you would like to be included please let us know. Roof drainage layout and calculation. If the allowable area is greater than the actual area then the gutter system is satisfactory. For valley and parapet gutter both results for straight and tapered vs are given.
Click to learn more. The gutter shapes and sizes shown below have been used in the preparation of the tables. Search all products by. You may find similar items within these categories by selecting from the choices below:. Where there are offsets or horizontal runs of pipes, the a separate calculation will be required to determine the capacity of the pipe system from roof level to ground level.
The standard also gives four categories of design rainfall intensity. Please download Chrome or Firefox or view our browser tips. For other design rainfall intensities separate calculations will 120056-3 required.
Nominally Level Freely discharging maximum flow capacity. Compare the actual area drained with the allowable area drained.
The roof area shown in the tables is based on outlets with no gratings or guards.