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Box 175 Performance
Dimond Box 175 Gutter allows rainwater or snow to be drained quickly and because of its large size, it is also easy to clean out. For extreme conditions where a bold look is desired.
All dimensions given are nominal.
Effective cross-sectional area (with 15mm freeboard): 19,250mm²
Flow capacity:363 litres/min
Minimum recommended fall:1:500 = 2mm in 1m
Circular - 115mm
Rectangular - min. cross-sectional area of 10,600mm²
Catchment area per downpipe based on the above flow capacity is given in Table 3.1H. Use Table 3.1B (Section 3.1.4 in Technical Manual) to determine
the Rainfall Intensity to be used.
Material options including thickness and grade:
Steel 0.55mm G300
Aluminium 0.90mm H34 offered in folded shape only
Stainless steel refer Customer Services
Roll-forming facility: Hamilton
(Note: all Dimond branches can fold gutter shapes with swages patterns to be confirmed at time of order) (2)
Gutter bracket materialand thickness
Hot dipped galvanised 5mm x 30mm
Aluminium 7mm x 30mm
Stainless steel 5mm x 30mm
Recommended maximum spacing: Steel 900mm, Aluminium 600mm (refer section 188.8.131.52 in Technical Manual for recommended spacing where snowfall is possible).
Recommended fixings: Bolts or screw fastenings to be compatible with substrate and bracket material.
(1) Internal brackets are not recommended for use in areas that are subject to snowfall and/or wind above medium velocity (as determined by NZS 3604
(2) Internal brackets are not recommended with folded gutter without a 4mm diameter aluminium rivet fixing through the gutter and bracket, it is better to use external brackets.
The traditional box shape has been specifically designed for heavy rainfall intensity, where fewer downpipes a...