Association of Hydraulic Services Consultants Australia – Research Foundation 
Page 7 of 10 
Figure 4 - DeltaTrim DPP1150 Maximum Roof Lengths for Rainfall Intensities  
0
50
100
150
200
250
100
150
200
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300
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500
Maximum Roof Length (m)
100 year Rainfall Intensity (mm/h)
Pitch  
 10°
Pitch  
 7.5°
Pitch  
 5°
Pitch  
 4°
Pitch  
 3°
Pitch  
 2°

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