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Classification
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Classification
Building class 1a Building class 1b Building class 2 Building class 3 Building class 4 Building class 5 Building class 6 Building class 7a Building class 7b Building class 8 Building class 9a Building class 9b Building class 9c Building class 10a Building class 10b Building class 10c
Part D1 Roof Drainage Systems (Performance Requirements)Part D1 Roof Drainage Systems (Verification Methods)Part D1 Roof Drainage Systems (Deemed-to-Satisfy)Part D2 Surface and Subsurface Drainage Systems (Performance Requirements)Part D2 Surface And Subsurface Drainage Systems (Verification Methods)Part D2 Surface And Subsurface Drainage Systems (Deemed-to-Satisfy)