Smacna Gutter Expansion Joint

The spacing of the expansion joints depends on the size of the gutter and thickness of the metal but a.

Smacna gutter expansion joint.

Smacna architectural sheet metal manual 7th edition figure 1 7 butt type gutter expansion joint. An invaluable inspection resource for owners of standing seam batten seam or bermuda type roofs. Presents practical troubleshooting and corrective tips for typical problems of roof panels gutters downspouts fascia copings flashing ridges and hips valleys expansion joints penetrations fasteners and soldering. Expansion joints are a component in seamless rain gutter systems designed to protect the gutters from the effects of thermal expansion.

Sheet metal and air conditioning contractors national association 4201 lafayette center drive chantilly virginia 20151 1219 tel 703 803 2980 fax 703 803 3732. Thermal expansion is the tendency for a material to expand and contract when exposed to changes in temperature. 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. Following smacna guidelines a 20 ounce copper built in gutter with a 12 inch bottom dimension should have a maximum distance to a fixed point such as a downspout ranging from 17 feet to 20 feet then there would be an expansion joint.