AS NZS 3727.1:2016 pdf free.Pavements Part 1: Residential. 4.1 DRAINAGE The minimum surface crossfall shall be 2.5% (1 in 40 or 25 mm in every 1 m) to ensure surface drainage. In covered areas or pedestrian only areas, a lesser grade may be appropriate provided the aspects of drainage have been assessed. Where necessary, surface run-off shall be collected in...
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