This tool allows engineers architects designers and contractors to easily and accurately size downspout and gutters per smacna s architectural sheet metal manual.
Smacna gutter detail.
Located in headquarters outside washington d c the sheet metal and air conditioning contractors national association smacna an international association of union contractors has 1 834 members in 103 chapters throughout the united states canada australia and brazil.
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News smacna s downspout and gutter sizing calculator.
Description smacna residential sheet metal guidelines.
Dmi offers our box gutter in six standard smacna profiles see profiles tab below.
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.
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Custom profiles are also available.
All styles are supplied in a standard 6 size and are manufactured in 10 lengths with a heavy duty 125 aluminum interior strap.
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.
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In response smacna s technical resources department has created a free downspout and gutter sizing calculator.
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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.
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.
Architectural sheet metal manual this completely revised publication contains the most comprehensive set of recommended practices available for proper design and installation of custom fabricated architectural sheet metal including roof drainage system design for scuppers gutters and downspouts.
The sheet metal and air conditioning contractors national association smacna is now providing a simple and effective downspout gutter sizing calculator.
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One of the most frequently asked architectural questions smacna receives is on sizing gutters and downspouts.
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