Manual for the design of roof drainage systems

This manual provides comprehensive guidance on how roof drainage systems for buildings should be designed using information given in European Standard 12056:3:2000 "Gravity drainage systems inside buildings - Part 3: Roof drainage, layout and calculations". The manual is intended to be used in conjunction with BS EN 12056-3 and contains separate chapters dealing with the following topics: rainfall data, effective catchment area, design flow loads, capacity of freely-discharging gutters, outlets from gutters, capacity of gutters with restricted discharge, drainage of flat roofs, overflow weirs, rainwater pipes and drains inside buildings, siphonic systems.