Good comments. I have a 6" deep valley located between 2 roof sections with a 1:12 roof slope. 4" Downspouts are placed every 12.5'. The downspouts (about 6" long) attach to a 12" PVC pipe set at a 1% slope for discharge. The 12"pipe eventually becomes vertical for street level discharge...
First post. I need to verify sizing of roof valley gutter and downspouts required. C=0.99 A=1(acres) I= 8.0 in/hr. I used the circular weir formula Q=CA(2gh)^0.5
I am not aware of any COde Requirment for this and am not sure that Q=CIA is applicable for roofing systems (although it would...
