Box Gutter Expansion Joint Spacing

According to smacna the best way to protect your gutter system from thermal expansion is to split any run of 50 ft or more into two separate runs capping both ends and leaving gap between the top edges of the end caps fig 1.

Box gutter expansion joint spacing.

In this example your maximum spacing of downspouts should be 40. Expansion joint galv 24g 8 box kynar finish. And with our box gutter expansion joint vibration and expansion are not a problem. Minimum width 300 mm for commercial construction and 200 mm for domestic construction.

Contact us for a quote on a gutter expansion joint for your project. 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. The depth shown in the calculations is at the upstream end. Box gutter gradients shall not be flatter than 1 200 for sole widths equal to or less than 600mm wide.

Use an expansion joint every 40 50 lineal feet. Required gutter slope 1 40 to 1 200. They also have a flat profile meaning water will flow over it rather than pooling. Deviations from the gradient must be smooth and prevent towards the outlet without a proportional permanent ponding.

On top of this our box gutter expansion joints can be painted with regular acrylic paint. Rdca has the custom drain expansion joint you need for your commercial gutter system. They come in a stock standard 225ml width with lengths varying from 1 3 to 10 meters. It replaces the need to box the end of two adjoining gutters and also the need to form a bridge to span the boxed ends.

There is always some confusion as to how the slope affects the overall depth. Available in 9 width by 12 33 and 50 lengths box gutter expansion joint comes with a 20 year warranty and the peace of mind you get with all marco quality products. We re so confident in our box gutter expansion joints that we offer a 25 year warranty. Next we need to check spacing 335lf 8 downspouts 40 centers approximate.

Note that gutters require expansion joints at 40 centers. 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. Therefore any slope on the gutter will make the downstream end deeper or the flashing longer. The biggest benefit other than ease of installation is that in the case of a blocked downpipe any water can flow across to the adjoining gutter eliminating flooding.