Yes, this is allowed provided the at 5 inches subsoil drain discharges to a no more than 5 inches graded open area. No, this is only allowed for A subsurface areaway of 110 square areaways with more than one feet with ¼-inch-per-foot in a drain. location that receives rain at a rate of less than 1 inch per hour must have a A subsurface areaway basement drainpipe size of _______ diameter. entrance measuring 1500 square feet at least 2 inches with 1/8-inch-per-foot slope in a 3 inches maximum location receiving up to 5 inches per 3 inches minimum hour of rainfall must have a drainpipe no more than 2.5 inches size of _______ diameter. at least 2.5 inches at least 3 inches at least 4 inches no more than 4 inches
Yes, this is allowed provided the subsoil drain discharges to a graded open area. No, this is only allowed for areaways with more than one drain. A subsurface areaway basement entrance measuring 1500 square feet with 1/8-inch-per-foot slope in a location receiving up to 5 inches per hour of rainfall must have a drainpipe size of _______ diameter. at least 3 inches at least 4 inches no more than 4 inches at 5 inches no more than 5 inches A subsurface areaway of 110 square feet with ¼-inch-per-foot in a location that receives rain at a rate of less than 1 inch per hour must have a drainpipe size of _______ diameter. at least 2 inches 3 inches maximum 3 inches minimum no more than 2.5 inches at least 2.5 inches
2015%20UPC%20Ch%2011%20Storm%20Drainage%20Quiz%20_WA.docx