Product Range | Rainwater | Downpipes | Metal Rectangle Downpipes
Metal Rectangle Downpipes

Queensland Sheet Metal produce square and rectangular downpipes that are available in many sizes to suit any application for industrial and residential buildings. They are available in a range of Colorbond® Steel colours, Zincalume®, Galvanised, Stainless Steel and Copper.

Available Colours

Rectangular Downpipe Accessories

Additional Information

As a general guide, in non cyclonic areas, for every 1m² of roof area drained, 70mm² of downpipe is required. This calculation is based on the assumption that the maximum rainfall does not exceed 125mm per hour.

It is considered the best practice to drain to different points, using smaller downpipes rather than to one large outlet. Where possible, downpipes should be spaced at not more than 12000mm centres.


Profile BMT (mm) Tensile (MPa) Size A x B (mm) Roof Area Drained (m2) 
downpipe-image-for-graph 0.55 G300 50 x 50* 35
75 x 50 55
75 x 75 80
95 x 45 60
100 x 50 70
100 x 75 105
100 x 100 140
125 x 100 180
150 x 100 210
150 x 150 320
200 x 200 570

*1800mm lengths only

Note: Customised sizes are available upon request.