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Tread Dimensions
Tread Dimensions
Recommended widths(Based on 5mm load bars).*
Type WT1 TO ST4 Series1 125 155 185 215 245 275 305
Type WT1 TO ST4 Series2 125 165   205 245 285 325
Type WT1 TO ST4 Series3 125   185   245   305
Bolted Connections
Bolt hole crs’a 45 75 75 100 100 125 125
For other bar thicknesses,adjust width accordingly
Recommended Max.Lengths
Load Bar Size 25×3 25×5 32×5 40×5
Series1 550 900 1300 1600
Series2 450 750 1200 1500
Series3   550 850 1350
When Ordering a tread the grating type must be nominated e.g .wt6(wx wa 325 Series)
Fastening methods
Grating can either be welded or clamped to the supporting steelwork by the erection contractor.
The fastener (clip)has been designed to secure either Series 1,2 or 3 grating patterns.
Where no flange is available on the supporting steelwork the fastener top can be used with self drilling or thread cutting screws. 
Series 1 Grating Series 2 Grating Series 3 Grating
 
Fastener only and thread cutting screw Fastener used to secure two adjacent panels