Slab Properties

Bearing Requirements

concrete slabs
Self weight of slabs is approximately 2.5kn/m2 
bearing requirements

Loading requirements

Span Load Table
(housing applications)
Bs 6399 gives the required load carrying
capacities for various applications.

Some common applications are :
Housing - 1.5kn/m2
Garages - 2.5kn/m2
Industrial - 5.0kn/m2



Note: Wall loads are in addition to the above.
Clear Span (m)
Finish Floor Type
Timber Batten
Non-Structural Screed
1.90
16.0
15.3
2.15
14.0
13.3
2.40
12.5
11.9
2.65
11.3
10.6
2.90
10.2
8.8
3.15
8.2
7.6
3.40
8.3
6.8
3.65
6.4
4.9
3.90
6
4.8
4.15
4.5
3.1
4.4
4.7
3.3
4.65
3.5
2.0
4.90
2.8
1.9
5.00
2.5
-
5.10
2.0
-
Bar sizes increase at various stages. heavier steel can be used to increase the load carrying capacity

Span Load Table
(heavy applications)

Depth of Structural Screed

Clear Span (m)
4.0
4.5
5.0
5.5
6.0
6.5
50mm
10.8
10.5
8.5
5.8
3
1.3
75mm
11.3
11.1
9.4
8
5.6
2.8
100mm
11.7
11.5
11
10.1
8
5

For details of floor finish types see finishings page.
Tables give load bearing capacity in kn/m2

Cantilever

Slabs can be cantilevered up to 1.2m to accommodate stair openings.

 cantilever

Hanger Bracket

Hanger brackets can be fabricated to support slabs around openings.

 hanger bracket

Services

Slabs are commonly used at ground floor and service openings can be accommodated.

 services

Wallplates

Where slabs are used in a dormer bungalow, the wall plate is usually fixed to the slab as indicated.

 wallplates
 
 

 

 

 

 

 


 



 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 
 
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