Building Construction Handbook, Eighth Edition
Subsoil Drainage Systems ~ the lay out of subsoil drains will depend on whether it is necessary to drain the whole site or if it ...
General Principles ~ a roof must be designed with a suitable fall towards the surface water collection channel or gutter which i ...
Surface Water Removal---Roofs ...
Surface Water Removal---Paved Areas ...
Highway Drainage ~ the stability of a highway or road relies on two factors † 1. Strength and durability of upper surface Stren ...
Road Drainage ~ this consists of laying the paved area or road to a suitable crossfall or gradient to direct the run-off of surf ...
Materials ~ the traditional material for domestic eaves gutters and rainwater pipes is cast iron but uPVC systems are very often ...
external pipe clip, holderbat wall or spigot with projecting ears rainwater pipe rainwater shoe sealed access cover ground level ...
Soakaways ~ provide a means for collecting and controlling the seapage of rainwater into surrounding granular subsoils. They are ...
Drains ~ these can be defined as a means of conveying surface water or foul water below ground level. Sewers ~ these have the sa ...
Separate System ~ the most common drainage system in use where the surface water discharge is conveyed in separate drains and se ...
Combined System ~ this is the simplest and least expensive system to design and install but since all forms of discharge are con ...
Partially Separate System ~ a compromise system † there are two drains, one to convey only surface water and a combined drain to ...
Inspection Chambers ~ these provide a means of access to drainage systems where the depth to invert level does not exceed 1„000. ...
Plastic Inspection Chambers ~ the raising piece can be sawn horizontally with a carpenter's saw to suit depth requirements with ...
Means Of Access † provision is required for maintenance and inspection of drainage systems. This should occur at: the head (hi ...
Excavations ~ drains are laid in trenches which are set out, excavated and supported in a similar manner to foundation trenches ...
Watertightness ~ must be ensured to prevent water seapage and erosion of the subsoil. Also, in the interests of public health, f ...
Drainage Pipes ~ sizes for normal domestic foul water applications:- <20 dwellings = 100 mm diameter 20†150 dwellings = 150 m ...
Water supply ~ an adequate supply of cold water of drinking quality should be provided to every residential building and a drink ...
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