Have a minimum depth of 75mm at the high end.
Box gutter sump depth.
Choose an available size or any other size and enter that for the calculation of the sump.
The theoretical down pipe diameter is shown for reference purposes only.
The depth shown of the box gutter is the depth at the upstream end.
All domestic box gutters must be a minimum of 200mm wide and 75mm deep.
Have a sole width which is not reduced discharge at the downstream end without.
Have a minimum width of 300mm for commercial installations 200mm for domestic installations.
The suggested down pipe diameter is shown for reference purposes only.
Architects and draftsmen are reminded that any roof drainage system including box gutters and eaves gutters need to be designed and installed with an appropriately sized overflow.
Choose an available dp size or any other size and enter that for the calculation of the sump.
2015 3 7 4 layout e for the sump high capacity overflow device the depth of the sump hs shall be not less than 150 mm regardless of the position of the normal outlet.
The sole width of the box gutter is not to be reduced towards the outlet without a proportional increase in depth.
Discharge through either a rainhead or sump.
The depth shown of the box gutter is the depth at the upstream end.