I guess the grate capacity. My problem is determining what spread to use in my calcs. Should it be the entire width of the parking area between curbs? And do I abritrarily pick a grate width to use for the flow capacity of the inlet and then iterate the dimensions of the grate until the flow...
Does anyone have experience sizing catch basin inlets in parking lot? I am doing this for the first time and have not had any luck finding adequate information online or in books.