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BOX GUTTER AND RAIN WATER HEAD DESIGN TO AS/NZS 3500.3: 2015
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Design Storm Intensity
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I
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=
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mm/hr
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Horizontal catchment area
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Ah
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=
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sq.m
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Roof slope
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S
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=
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degrees
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from AS 3500 fig 3.3(a), Vertical Area
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Av
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=
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=
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sq.m
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from eqn 3.4.3(1), Catchment Area
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Ac
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=
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Ah+0.5*Av
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=
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sq.m
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Flow
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Q
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=
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I*Ac/3600
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Litres/sec
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=
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Litres/sec
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From fig I1 (Interpolating where necessary)
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using:- Gutter Slope
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1
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in
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and Gutter Width
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W
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=
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mm
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from fig I1 Minimum Gutter Depth |
d
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=
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mm
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from fig I1 gutter depth at 1:200
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d
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=
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mm
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Rain Water Head Calculations
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Selected down pipe size
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dia
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=
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mm
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From fig I3, Rain water head Depth
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=
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mm
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From fig I3, Rain water head Length at slope 1:200
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=
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mm
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Rain water Head Width
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=
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mm
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Summary
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Down Pipe Size
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=
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mm
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Box Gutter Width
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=
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mm
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Box gutter minimum Depth
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=
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mm
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Rain Water Head Depth
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=
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mm
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Rain Water Head Length
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=
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mm
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Rain Water Head Width
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=
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mm
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James Crint |
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Head Honcho |
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ph n nnnnnnnnn |
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m mmmmmm |
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