Smacna Standards Gutters

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

Smacna standards gutters.

The downspout and gutter sizing calculator is located on the tools cad and apps page of the smacna website. In response smacna s technical resources department has created a free downspout and 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. Smacna standards and manuals address all facets of the sheet metal and hvac industry including duct construction and installation indoor air quality energy recovery roofing and architectural sheet metal welding and commissioning.

One of the most frequently asked architectural questions smacna receives is on sizing gutters and downspouts. News smacna s downspout and gutter sizing calculator. Ansi the american national standards institute has accredited smacna as a standards setting organization. Expansion allowances gutter specific expansion tables based on girth profile metal predicted annual δt expansion of building materials table with various expansion coefficients must be used for fascia and copings with consideration of both metal and substrate flat seam roof expansion guidance over 30 feet use batten seam design to allow for expansion.

Now architects engineers designers contractors and facility managers can easily and accurately size downspouts and gutters according to the specifications in smacna s architectural sheet metal manual 7th edition 2012. The sheet metal and air conditioning contractors national association smacna is now providing a simple and effective downspout gutter sizing calculator. Dmi offers a full line of accessories including internal gutter support brackets custom under brackets mitered corners end caps splice plates expansion joints outlets downspouts elbows and downspout straps. In response smacna s technical resources department has created a free downspout and gutter sizing calculator.

To limit the effects of thermal expansion in gutters 50 ft. Custom profiles are also available. Saf smacna gutters are an extension of the saf industrial series gutters but with profile features contained in the sheet metal and air conditioning contractors national association smacna manual. This tool allows engineers architects designers and contractors to easily and accurately size downspout and gutters per smacna s architectural sheet metal manual.

All styles are supplied in a standard 6 size and are manufactured in 10 lengths with a heavy duty 125 aluminum interior strap. 15 m is a practical maximum gutter length to be served by a downspout.