Box Gutter Sump Design

Box gutter and rain water head at end of box gutter allowance for vertical faces and catchments on both sides of box gutter.

Box gutter sump design.

To avoid problems plumbers need to calculate the hydraulic capacity of a box gutter and when designing overflow devices consider whether the discharge of the box gutter is to. The issue today is the copper would disappear not counting the cost to reinstall. A a rainhead b a sump with a side overflow device. Down pipe must be vertical from sump not to the side minimum sump length is 400mm.

A sump with a side overflow device. Design a box gutter to an internal sump with a side overflow. Box gutters must be straight no bends. Sides must be vertical.

A rainhead or sump is a container located between the gutter and downpipe that aids the flow of water away from the roof. Or c a sump with a high capacity overflow device. Low and behold the box gutter is rotted out. The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep.

All of the above options provide overflow provision to the box gutter. Find the design rainfall. To avoid problems plumbers need to calculate the hydraulic capacity of a box gutter and when designing overflow devices consider whether the discharge of the box gutter is to. Box gutter design to as 3500 3 2015.

A box gutter is defined as a graded channel generally of a rectangular shape for the conveyance of rainwater within the building footprint including adjacent to a wall or parapet. Must have a constant slope between 1 40 and 1 200. The old box gutters worked great in the day. The esthetics of the box gutter hid the gutter from sight which was important during that time.

Sumps are to be appropriately sized in accordance with as nzs 3500 3 with a minimum length of 400 mm and when fitted with a high capacity overflow device with a depth of not less than 150 mm when either one or two box gutters enter the sump. A slate tile roof connecting to the box gutter and then to the copper spouts. To do this we need 3 things what is the biggest storm we should design for. A sump with a high capacity overflow device.

Suitable for flattish roofs with little or no vertical faces or steep roofs draining to one side of box gutter only or any roof if you are in a hurry and make the necessary allowances for all catchments.