Sump with high capacity overflow device.
Box gutter sump depth.
The depth shown of the box gutter is the depth at the upstream end.
To determine the box gutter depth is the first and foremost step for sizing components and materials for the roof drainage system which includes the rain heads and the box gutters.
The line will correspond to a minimum box gutter depth.
This is a good size for the required flow.
Deviations from the gradient must be smooth and prevent towards the outlet without a proportional permanent ponding.
This will give a sump depth about 150mm.
Box gutter gradients shall not be flatter than 1 200 for sole widths equal to or less than 600mm wide.
Choose an available size or any other size and enter that for the calculation of the sump.
The outlet must be no further than the diameter of the outlet to the centre of the outlet.
The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep.
The theoretical down pipe diameter is shown for reference purposes only.
These options give provisions for overflow to the box gutter.
The suggested down pipe diameter is shown for reference purposes only.
Here is a step wise guide for you to help.
Choose an available dp size or any other size and enter that for the calculation of the sump.