Box Gutter Sump Overflow

All domestic box gutters must be a minimum of 200mm wide and 75mm deep.

Box gutter sump overflow.

If draining to a sump with a side overflow somewhere along the box gutter use this calculator. A a rainhead b a sump with a side overflow device. Method used the method used is based on the flow chart fig 3 1 as nzs 3500 3 2003 downpipe and sump depth from fig i4 with minimum sump depth 150mm. Box gutter design to as 3500 3 2015.

A rainhead or sump is a container located between the gutter and downpipe that aids the flow of water away from the roof. All of the above options provide overflow provision to the box gutter. Intersect with chosen dp choose 125 dia. 2015 3 7 4 layout.

It depends on the value of ioc. Read off sump depth 175. The sump depth is not necessarily measured from the bottom of the bg. From before max flow 10l s.

It acts as an external overflow point to reduce water surges into the stormwater system and aid the flow of water down. Overflow devices consider whether the discharge of the box gutter is to. The side with the maximum flow is used to size the box gutter. Or c a sump with a high capacity overflow device.

This effectively states that all box gutters must allow for 30mm of freeboard which is from the overflow point eg. Rainheads are an essential design element for buildings where internal box or trough gutters are used. The total flow is used to size the sump and overflow. The hydraulic capacity of these overflow devices must not be less than the design flow for the.