Box Gutter Expansion Joint Spacing

The expansion strip joint has been designed to install as an expansion joint for industrial box gutters.

Box gutter expansion joint spacing.

They come in a stock standard 225ml width with lengths varying from 1 3 to 10 meters. 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. 8 commercial box gutter expansion joint in kynar 500 steel. Therefore any slope on the gutter will make the downstream end deeper or the flashing longer.

Minimum width 300 mm for commercial construction and 200 mm for domestic construction. 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. We re so confident in our box gutter expansion joints that we offer a 25 year warranty.

And with our box gutter expansion joint vibration and expansion are not a problem. Use an expansion joint every 40 50 lineal feet. Next we need to check spacing 335lf 8 downspouts 40 centers approximate. Required gutter slope 1 40 to 1 200.

Deviations from the gradient must be smooth and prevent towards the outlet without a proportional permanent ponding. They also have a flat profile meaning water will flow over it rather than pooling. 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. 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.

Expansion joint galv 24g 8 box kynar finish. On top of this our box gutter expansion joints can be painted with regular acrylic paint. Note that gutters require expansion joints at 40 centers. Rdca has the custom drain expansion joint you need for your commercial gutter system.

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. Contact us for a quote on a gutter expansion joint for your project. There is always some confusion as to how the slope affects the overall depth. 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.