Load Deflection - Grating Direct

Load Deflection Tables

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Deflections:

The following is designed to help when calculating an acceptable deflection rate: For pedestrian traffic, the deflection of a floor panel under the design load shall not exceed 10mm or 1/200th of the span, whichever is the lesser. The difference in level between a loaded and a neighbouring unloaded flooring shall not exceed 4mm.

Deflection rates are taken from BS4592-0:2006.

The below load data is for a concentrated load, a point load of approx. 300x300mm square similar to pedestrian loadings.

Grating Type Different thicknesses and mesh	Span The distance between supports	Load in KGs applied to the grating panel
Grating Type Different thicknesses and mesh	Span The distance between supports	149kg ↓	372kg ↓	745kg ↓	1117kg ↓	1490kg ↓	2234kg ↓	2979kg ↓
		↓ Above load applied gives below deflection on panels ↓
25mm thick / 32mm hole	457mm →	0.3mm	0.7mm	1.6mm	2.2mm	2.7mm	4.2mm	5.2mm
38mm thick / 32mm hole	457mm →	0.2mm	0.4mm	0.7mm	0.9mm	1.1mm	1.7mm	2.2mm
50mm thick / 42mm hole	457mm →	0.1mm	0.2mm	0.35mm	0.5mm	0.65mm	0.90mm	1.1mm
14mm thick / 13mm hole	457mm →	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Type	Span	149kg	372kg	745kg	1117kg	1490kg	2234kg	2979kg
25/32mm	610mm →	0.7mm	1.7mm	3.2mm	4.6mm	6.1mm	9.1mm	12.1mm
38/32mm	610mm →	0.35mm	0.9mm	1.5mm	1.9mm	2.4mm	3.5mm	4.2mm
50/42mm	610mm →	0.1mm	0.35mm	0.7mm	1.1mm	1.5mm	2.0mm	2.5mm
14/13mm	610mm →	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Type	Span	149kg	372kg	745kg	1117kg	1490kg	2234kg	2979kg
25/32mm	914mm →	1.8mm	4.5mm	8.8mm	13mm	17mm	25mm	32mm
38/32mm	914mm →	0.6mm	1.5mm	2.9mm	4.1mm	5.4mm	8mm	10.6mm
50/42mm	914mm →	0.2mm	0.7mm	1.4mm	1.9mm	2.9mm	4.2mm	5.5mm
14/13mm	914mm →	N/A	N/A	N/A	N/A	N/A	N/A	N/A
Type	Span	149kg	372kg	745kg	1117kg	1490kg	2234kg	2979kg
25/32mm	1219mm →	2.95mm	7.55mm	15mm	21mm	31mm	39mm	49mm
38/32mm	1219mm →	0.9mm	2.4mm	4.7mm	7mm	9.2mm	13.7mm	17.5mm
50/42mm	1219mm →	0.4mm	1mm	2.2mm	3.2mm	4.55mm	6.8mm	9.3mm
14/13mm	1219mm →	N/A	N/A	N/A	N/A	N/A	N/A	N/A

N/A = Not currently available

Chemical Resistance

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