Vertical faces enter the full vertical face area.
Box gutter sump size.
Experiment with this figure to get the depth of box gutter you require.
Sides must be vertical.
Learn more how to storm water design for building sites.
For commercial projects the minimum allowable width is 300mm.
The rectangular overflow width is equal to the box gutter width less 100mm.
The width can also be any shape.
Experiment with this figure to get the depth of box gutter you require.
Box gutters should have a minimum fall of 1.
Sump with a side overflow device sumps do require an increase in the depth of flow in the box gutter and gutters are to be fitted with either.
If draining to a sump with a vertical overflow in the middle of the box gutter use this calculator.
The gutter collects the water and disposes of it through the drainpipe.
For the associated box gutter outlet.
They collect storm water before it is carried away by the downpipe and they also serve to catch any debris before it enters the downpipe.
Tapered from the bottom of the box gutter to the downpipe if required.
The outlet must be no further than the diameter of the outlet to the centre of the outlet.
A box gutter is given its name as it is usually boxed into the middle or edge of the roof.
Sumps are usually attached between a box gutter and the downpipe.
Sizes the depth shown of the box gutter is the depth at the upstream end.
Box gutters must be straight no bends.
Box gutter gradients shall not be flatter than 1 200 for sole widths equal to or less than 600mm wide.
Trial box gutter width the minimum width allowed for domestic projects is 200mm.
Sumps can be made to order but are commonly manufactured in either 100mm and 150mm depths.
Overflow devices need to discharge to the atmosphere in such a way as to prevent damage to buildings and property.
But cannot be reduced to less than the box gutter width.
How much fall should i have on a box gutter.
Downpipe eaves gutter long straight eaves gutters box gutter to rain water head box gutter vertical faces box gutter side o flow box gutter vertical o flow storm water pipe size storm water network overland flow path spitter upstream end custom rain water head.
50mm clearance on both sides.
The minimum size of a sump is 400mm x 200mm minimum width of box gutter and 150mm deep.
Custom design the width of the rain water head can be increased to any width.
Deviations from the gradient must be smooth and prevent towards the outlet without a proportional permanent ponding.
Must have a constant slope between 1 40 and 1 200.
Down pipe must be vertical from sump not to the side minimum sump length is 400mm.
