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Walkways

Only aluminium, stainless steel, inert plastic, or hot-dipped galvanized steel framing members are acceptable for support structures above steel cladding and must be supported by the structural members or across the ribs of the profile adjacent to the ribs.  They should be designed to allow natural rain washing of the roof underneath.
Clause: 
004_010_005_000_000_000_000_000_000
Clause Number: 
4.10.5
4.11.5
/cop/durability/other-causes-corrosion#walkways
Draft Clause: 
004_011_005_000_000_000_000_000_000