Gutter Expansion Joint Spacing

The space between joints in curbs and gutters space between contraction joints or between contraction and expansion joints shall not exceed ten feet.

Gutter expansion joint spacing.

Next we need to check spacing 335lf 8 downspouts 40 centers approximate. There are a couple of options when it comes to expansion joints in gutters. The space between sidewalk joints shall not exceed 125 of the sidewalk width for example. The spacing of the expansion joints depends on the size of the gutter and thickness of the metal but a general rule is that an expansion joint should be included about every thirty feet.

Thermal expansion is the tendency for a material to expand and contract when exposed to changes in temperature. Note that gutters require expansion joints at 40 centers. Sidewalk that abuts curb or gutter shall have joints that match the curb or gutter joints. In this example your maximum spacing of downspouts should be 40.

By reducing the downspout spacing to perhaps 35lf you could use a 6 gutter with 9 4 x6 downspouts in lieu of an 8 system. Copper aluminum zinc and galvanized steel. Expansion joint galv 24g 8 box kynar finish. Most new box gutters these days are made of either copper or stainless steel although many old box gutters were made of terne coated steel.

Expansion joints in copper gutters must be provided to allow for the natural expansion and contraction of copper caused by thermal changes. 8 commercial box gutter expansion joint in kynar 500 steel use an expansion joint every 40 50 lineal feet. Recommended hanger spacing is 24 on centers.