Dimond Box 300 Commercial Gutter

Dimond Box 300 Gutter

Suitable for light commercial

Suitable for commercial

Box 300 Gutter is manufactured in Hamilton and Christchurch.

If this product is not suitable for your project... Click here to find product options suitable for your requirements.

Dimond Box 300 Gutter Profile

Large sized square gutter for commercial and industrial applications

Dimond Box 300 Gutter Profile

Dimond Box 300 Gutter Profile Dimensions

all dimensions given are nominal

Effective cross sectional area (with 15mm free board)


Flow capacity

727 litres/min

Minimum recommended fall

1:500 (2mm in 1m)

Minimum downpipe - Circular


Minimum downpipe - Rectangular

min. cross sectional area of 18,500mm²

Catchment area per downpipe based on the above flow capacity is given in the table below.

Rainfall Intensity (mm/hr) 40 50 60 70 80 90 100 120 140 160 180 200
Catchment Area per downpipe (m²) 1090 870 725 620 545 485 435 360 310 270 240 215

Material options including thickness and grade


0.55mm G300


0.90mm H34


0.55mm 1/2 hard

Stainless steel

refer Dimond

Roll-forming facility

Hamilton (dimensions may vary slightly, please check with your local Dimond branch)

Bracket Material Thickness
External Hot dipped galvanised 5mm x 50mm
External Aluminium 6mm x 38mm
External Stainless steel 5mm x 40mm

Recommended bracket maximum spacings

Steel - 600mm (refer snow bracket instructions for spacings where snow fall is possible)

Aluminium - 450mm internal, 600mm external

Recommended fixings

Bolt, screw or nail fastenings to be compatible with substrate and bracket material

Sales Centres
Tech Support

Share to social media