Smacna Gutter Expansion Joint

Sheet metal and air conditioning contractors national association 4201 lafayette center drive chantilly virginia 20151 1219 tel 703 803 2980 fax 703 803 3732.

Smacna gutter expansion joint.

Seal tite ig 1 ig 2 ig b miter details. Smacna architectural sheet metal manual 7th edition figure 1 7 butt type gutter expansion joint. Figure 1 9 built in gutter expansion joint at wall jan 12 2018 15 05 pm figure 1 8 built in gutter expansion joint. 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.

Smacna gutter installation instructions step 3. The spacing of the expansion joints depends on the size of the gutter and thickness of the metal but a. 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. Gutter expansion joint style 1 smacna design print approval.

Gutter expansion joint style 2 free flow design print approval. Tpo coated thru wall scupper print approval. Install expansion joints at the ends of every forth 4th gutter section which will divide the gutter system into 40 segments. 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. Smacna architectural sheet metal manual 7th edition figure 1 8 built in gutter expansion joint. There are a couple of options when it comes to expansion joints in gutters. Expansion joints are a component in seamless rain gutter systems designed to protect the gutters from the effects of thermal expansion.

Non 90 gutter miter print approval. The expansion joint consists of a self adhesive rubber strip to cover a 1 gap joint between adjoining sections and an exterior cover plate.