Box Gutter Minimum Depth

It may be lined with epdm rubber metal asphalt or roofing felt and may be concealed behind a parapet or the eaves or in a roof valley.

Box gutter minimum depth.

Hydraulic designers sizing roof drainage know all too well about h 2h dg and dmax which were easy to work into. Note it is possible in a wide box gutter for the depth to be shallower than for box gutters with a free outfall. Have a minimum width of 300mm for commercial installations 200mm for domestic installations. Have adequate overflow provision at all rain heads and sumps.

Determine minimum gutter depth. Have a minimum width of no less than 200mm for a domestic box gutter 300 mm for commercial. Layout box gutters must. Box gutter outlets must discharge through either a rainhead or sump.

From there all the calculations are built into shared parameters. Starting at the gutter gradient intersection draw a line up the design graph for a freely discharging box gutter chart in your copy of the standard. Minimum box gutter depth. I decided to use the kg martin method for sizing from the csiro experimental building notes 1978.

Have a minimum depth of 75mm at the high end. Box gutters must be straight no bends. As an alternative the top of the rainhead may be installed so that it is no higher than 50 per cent of the flow depth of the box gutter consistent with saa hb39 installation code for metal roof and wall cladding section 5 clause 5 7 3 and figure 5 7 3 to prevent internal flooding or damage to the building or contents see figure 2. All domestic box gutters must be a minimum of 200mm wide and 75mm deep.

Box gutters are essentially placed between parallel surfaces as in a valley between parallel roofs or at the junction of a roof and. Changes are not required provided the sump side overflow device is used. 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. Down pipe must be vertical from sump not to the side minimum sump length is 400mm.

Box gutters should have a minimum fall of 1. The minimum depth required for the box gutters that make up this roof drainage system is 125 mm. Sides must be vertical. Have a depth at the high end of not less than 75mm.

Can i change the measurements on this box gutter flashing. Sizes the depth shown of the box gutter is the depth at the upstream end. We can manufacture this box gutter to your custom measurements. Due to differences in the freeboard requirements in this instance the deepest box gutter is required and used in the program.

The line will correspond to a minimum box gutter depth. Overflow box gutters must have independent overflow provision discharging to the atmosphere. Trial box gutter width the minimum width allowed for domestic projects is 200mm.