| Allowable
loads for load distributions of simply supported lattice beam
with a compression chord restraint at 1m intervals |
| |
|
Type
of load
|
Clear
Span
|
| Length
of beam |
|
4m |
5m
|
6m
|
7m
|
8m |
9m
|
10m
|
11m
|
12m |
| Uniformly
distributed load |
kN/m |
7.0
|
5.0
|
3.5
|
2.6
|
2.0
|
1.6
|
1.3
|
1.0
|
0.9 |
Total
UDL
|
kN
|
27.8
|
25.1
|
20.9
|
17.9
|
15.7
|
14.0
|
12.6
|
11.4
|
10.5 |
Single
point load (mid point)
|
kN
|
15.7
|
12.6
|
10.5
|
9.0
|
7.9
|
7.0
|
6.3
|
5.7
|
5.2 |
Two
point loads (third points)
|
each
kN
|
11.8
|
9.4
|
7.9
|
6.7
|
5.9
|
5.2
|
4.7
|
4.3
|
3.9 |
Three
point loads (quarter points)
|
each
kN
|
7.9
|
6.3
|
5.2
|
4.5
|
3.9
|
3.5
|
3.1
|
2.9
|
2.6 |
| |
| |
Notes
|
|
| 1 |
The
above allowable loads may be increased by 1.11 for wind loads
only |
| 2 |
The
table is provided as a guide only and assumes all loads are
applied at restrained nodes. |
| 3 |
All scaffolds and structures should be designed and checked
by a qualified structural engineer. |
| 4 |
Maximum
capacity of a point load midway between nodes is 15kN, but overall
buckling of the top chord should be checked if loads are placed
other than at restrained loads. |
| 5 |
Loads
indicated in italics are limited by shear. |
