Wholesale Distributors since 1889
The UK's leading supplier of wrought
iron, mesh and other steel products

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Open Steel Flooring

Bar Size Selector The tables below are an easy guide to enable you to choose the most appropriate bar size to achieve the three categoroes of loading specified in BS4592 The tabulated figures are in mm and represent the maximum unsupported span for each load bar.

Light Duty 3.0 KN/M² Access limited to 1 person General Duty 5.0 KN/M² Regular pedestrian traffic Heavy Duty 7.5 KN/M² High density traffic

Load Bearing Bars at 41mm pitch - W100
Duty	20x3	20x5	25x3	25x5	30x3	30x5	35x3	35x5	40x3	40x5	45x5	50x5	55x5	60x5
Light	1104	1308	1379	1636	1655	1952	1931	2214	2155	2446	2673	2892	3108	3317
General	935	1103	1164	1379	1396	1655	1629	1931	1861	2154	2353	2546	2735	2919
Heavy	815	964	1017	1204	1220	1446	1423	1687	1626	1928	2126	2301	2471	2638

Load Bearing Bars at 30mm pitch - N100
Duty	20x3	20x5	25x3	25x5	30x3	30x5	35x3	35x5	40x3	40x5	45x5	50x5	55x5	60x5
Light	1223	1449	1528	1802	1834	2110	2104	2391	2326	2643	2887	3124	3355	3581
General	1031	1223	1289	1529	1547	1834	1805	2104	2047	2326	2541	2750	2953	3152
Heavy	901	1068	1126	1335	1351	1602	1577	1869	1802	2103	2295	2485	2668	2849

flooring index

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