Gutter Spread Spreadsheet

Scuppers are the recommended method of deck drainage because they can reduce the problems of transporting a relatively large concentration of runoff in an area of generally limited right of way.

Gutter spread spreadsheet.

Triangle or multi triangle. Appendix 9c 9 velocity in triangular gutter sections. The spread is usually referred to as ponded width t as shown in figure 10 10. The ponded width is a geometric function of the depth of the water y in the curb and gutter section.

Appendix 9c 5 flow characteristic curves straight cross slope 12 gutter appendix 9c 6 flow characteristic curve roll type gutter appendix 9c 7 flow in composite gutter sections. Free with a google account. This spreadsheet calculates the spread width of flow gutter velocity and bypass flow for an inlet installation on a continuous run. Allowable width of flow flow spread or zd allowable 0 1 cfs maximum flow allowed to bypass last inlet qbp if flow is slow enough and gutter is flat spreadsheet allows more flow into inlet automatically done for you flow spreads these equations show the depth of flow as a function of gutter.

Gutter spread should be checked to ensure a safe reasonable design. Spread geometry and calculations a curb and gutter combination forms a triangular channel that can carry runoff without interrupting traffic. Minutes see hydraulics manual 2 5 3 runoff coefficients for rational method. The inlet spacing spreadsheet xls 167 kb combines the procedures described in the wsdot hydraulics manual to calculate roadway runoff and inlet interception of a continuous curb and gutter run for a roadway.

However the use of scuppers should be evaluated for site specific concerns. Appendix 9c 8 ratio of frontal flow to total gutter flow. Create a new spreadsheet and edit it with others at the same time from your computer phone or tablet. See hydraulics manual 2 5 2 rainfall intensity inch hr see hydraulics manual 2 5 4.

The larger of the two calculations must be used to balance both the annual runoff and delivered nutrients. Gutter spread gutter spread calculations are required for the driveway if curb and gutter or header curb is used table 6 1 general requirements of hydrology reports separate drainage calculations must be provided for the pre developed condition and for the proposed development. The spreadsheet calculates the minimum size of a vta to balance both the site s contributing water runoff and delivered nutrients.