THE SPECIALISTS IN INDUSTRIAL FLOORING AND HANDRAILING

LOAD TABLES

BS4592 states three categories of load:

  • 3.0 kN/m2 – Light Duty, access limited to one person.
  • 5.0 kN/m2 – General Duty, regular pedestrian traffic.
  • 7.5 kN/m2 – Heavy Duty, high density pedestrian traffic.

Reference to the following load tables will assist in choosing the most practical and economical type of grating to suit the required span and loading criteria. Values are uniformly distributed loads stated in kN/m2 and have been calculated with deflections limited to 1/200th of the span or 10mm whichever is the lesser.

For further assistance or information on concentrated and wheel loads, or serrated gratings, please contact our sales department.

41mm Pitch Table
Clear Span
Load Bar
600
750
900
1050
1200
1350
1500
1650
1800
1950
2100
2250
2400
2550
2700
2850
3000
kN / m2
60 X 5
275.0
176.0
122.2
89.8
68.8
54.3
44.0
36.4
30.6
24.5
18.7
14.2
10.9
8.6
6.8
5.5
4.5
50 X 5
191.0
122.2
84.9
62.4
47.7
37.7
30.6
23.4
18.0
14.2
10.8
8.2
6.3
5.0
4.0
3.2
40 X 5
122.2
78.2
54.3
39.9
30.6
21.9
15.9
12.0
9.2
7.3
5.5
4.2
3.2
40 X 3
73.3
46.9
32.6
23.9
18.3
13.1
9.6
7.2
5.5
4.4
3.3
35 X 5
93.6
59.9
41.6
30.6
20.8
14.6
10.7
8.0
6.2
4.9
3.7
35 X 3
56.1
35.9
25.0
18.3
12.5
8.8
6.4
4.8
3.7
3.1
30 X 5
68.8
44.0
30.6
19.6
13.1
9.2
6.7
5.0
3.9
30 X 3
41.3
26.4
18.3
11.6
7.9
5.5
4.0
3.0
25 X 5
47.7
30.8
18.0
11.3
7.6
5.3
3.9
25 X 3
28.6
18.3
10.8
6.8
4.6
3.2
20 X 3
18.3
9.6
5.5
3.5
30mm Pitch Table
Clear Span
Load Bar
600
750
900
1050
1200
1350
1500
1650
1800
1950
2100
2250
2400
2550
2700
2850
3000
kN / m2
60 X 5
374.0
239.4
166.2
122.1
93.5
73.9
59.8
49.5
41.6
33.3
25.4
19.3
14.9
11.7
9.3
7.5
6.1
50 X 5
259.7
166.2
115.4
84.8
64.9
51.3
41.6
31.8
24.5
19.3
14.7
11.1
8.6
6.8
5.4
4.3
3.5
40 X 5
166.2
106.4
73.9
54.3
41.6
29.7
21.7
16.3
12.5
9.9
7.5
5.7
4.4
3.5
40 X 3
99.7
63.8
44.3
32.6
24.9
17.8
13.0
9.8
7.5
5.9
4.5
3.4
35 X 5
127.3
81.4
56.6
41.6
28.3
19.9
14.5
10.9
8.4
6.6
5.0
3.8
35 X 3
76.4
48.9
33.9
24.9
17.0
11.9
8.7
6.5
5.0
4.0
3.0
30 X 5
93.5
59.8
41.6
26.6
17.9
12.5
9.1
6.9
5.3
4.2
3.2
30 X 3
56.1
35.9
24.9
16.0
10.7
7.5
5.5
4.1
3.2
25 X 5
64.9
41.6
24.5
15.4
10.3
7.3
5.3
4.0
3.1
25 X 3
39.0
24.9
14.7
9.3
6.2
4.4
3.2
20 X 3
24.9
13.0
7.5
4.7
3.2

Maximum Span Tables

Reference to these tables will show the maximum unsupported span to achieve the three categories of loads shown whilst limiting deflection to the required British Standards recommendation.
41 mm Pitch
Load UDL
Load Bar
3kN/m2
5kN/m2
7.5N/m2
Maximum Clear Span (mm)
60 x 5
3316
2919
2637
50 x 5
2893
2546
2300
40 x 5
2447
2153
1928
40 x 3
2153
1862
1626
35 x 5
2214
1931
1687
35 x 3
1931
1629
1423
30 x 5
1963
1655
1446
30 x 3
1655
1396
1220
25 x 5
1636
1379
1205
25 x 3
1379
1163
1016
20 x 3
1104
931
813
30 mm Pitch
Load UDL
Load Bar
3kN/m2
5kN/m2
7.5N/m2
Maximum Clear Span (mm)
60 x 5
3581
3152
2848
50 x 5
3124
2749
2484
40 x 5
2642
2325
2101
40 x 3
2325
2047
1802
35 x 5
2390
2104
1869
35 x 3
2104
1805
1577
30 x 5
2129
1834
1602
30 x 3
1834
1547
1351
25 x 5
1812
1528
1335
25 x 3
1528
1289
1126
20 x 3
1223
1031
901