Smacna Gutter And Downspout Sizing

In response smacna s technical resources department has created a free downspout and gutter sizing calculator.

Smacna gutter and downspout sizing.

Smacna s downspout and gutter sizing calculator one of the most frequently asked architectural questions smacna receives is on sizing gutters and downspouts. For additional information please see below. It should be used to calculate required gutter size downspout size and downspout spacing for a given roof area. 15 m is a practical maximum gutter length to be served by a downspout.

Smacna notes that one of the most frequently asked architectural questions the association receives is about sizing gutters and downspouts. This tool allows engineers architects designers and contractors to easily and accurately size downspout and gutters per smacna s architectural sheet metal manual. This application runs the equations laid out in the smacna handbook. The sheet metal and air conditioning contractors national association smacna is now providing a simple and effective downspout gutter sizing calculator.

The capacity of a sloped rectangular gutter may be approximated by using a gutter cross section area not less than that of a semicircular gutter and a depth to width ratio of at least 0 75. Now architects engineers designers and contractors can easily and accurately size downspouts and gutters according to the specifications in smacna s architectural sheet metal manual 7th edition 2012. Gutter sizing per smacna. To limit the effects of thermal expansion in gutters 50 ft.