Are encouraged to use this invaluable resource to assure that their specifications reflect professionally vetted design.
Smacna gutter expansion joint detail.
Thermal expansion is the tendency for a material to expand and contract when exposed to changes in temperature.
Sheet metal and air conditioning contractors national association 4201 lafayette center drive chantilly virginia 20151 1219 tel 703 803 2980 fax 703 803 3732.
To limit the effects of thermal expansion in gutters 50 ft.
An expansion joint cap is placed on top over the gutter end flanges and the cover plate.
Install expansion joints at the ends of every forth 4th gutter section which will divide the gutter system into 40 segments.
Smacna gutter installation instructions step 3.
The expansion joint consists of a self adhesive rubber strip to cover a 1 gap joint between adjoining sections and an exterior cover plate.
Figure 1 7 butt type gutter expansion joint edition.
There are a couple of options when it comes to expansion joints in gutters.
15 m is a practical maximum gutter length to be served by a downspout.
Sheet metal and air conditioning contractors national association 4201 lafayette center drive chantilly virginia 20151 1219 tel 703 803 2980 fax 703 803 3732.
2012 12 00 user per year.
Expansion joints are a component in seamless rain gutter systems designed to protect the gutters from the effects of thermal expansion.
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.
For the lap type gutter expansion joint a gutter end is recessed 2 1 2 minimum into the gutter on one gutter section and fitted flush on the other.
Smacna residential sheet metal guidelines 2001 is the first edition of this guide and offers builders designers contractors and homeowners a source of expert information on the proper installation and fabrication of exterior sheet metal through residential buildings.
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.
Figure 1 9 built in gutter expansion joint at wall jan 12 2018 15 05 pm figure 1 8 built in gutter expansion joint.
