Box Gutter Fall Ratio

The minimal slope needed for proper gutter drainage is 1 25 cm 1 4 inch for every 3 metres 10 feet of gutter.

Box gutter fall ratio.

Multiply the number of feet by 1 16 inch to determine the total slope the gutter requires. There is always some confusion as to how the slope affects the overall depth. Required gutter slope 1 40 to 1 200. Box gutters allowable width slope and length.

Increasing the pitch increases a gutter s handling capacity but the gutter may look askew over a long run. As a general rule gutter slope is set at 1 4 inch per 10 feet of guttering. Minimum width 300 mm for commercial construction and 200 mm for domestic construction. For example if the gutter is 16 feet long the end near the down spout must be 1 inch lower than the starting end.

For example if you have 30 feet of guttering the calculation is 1 4 x 3 0 75 i e. Next place a ladder at the left side of the house and measure from the roof down to the gutter. The standard is about inch per 10 feet. Measure the length of gutter needed.

This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg. I fall or slope box gutters to be installed with a minimum uniform fall of 1 in 200 towards the outlet.