Stormwater drainage design guidelines 2019

Fibre Reinforced Concrete Pipe. Galvanised Wrought Iron Box Culvert or Pipe Section. Cast Iron Pipe. Box Culvert sections to a street channel. Four-sided welded mild steel plate, hot-dipped galvanised, 6mm thickness for up to 230mm wide. 10mm thickness for 230mm to 380mm wide, 10mm thickness with a centre wall if wider than 380mm. Pre-cast ... ................
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