THE dead load includes self weight of the structure and all other superimposed loads which are paranently attached to the structures.Such load do not change their position and don't vary in magnitude.
The self weight of the structure being ununknow beginning of the design,it haes be to assumed by the designer in the light of experience and thumb rules and formula available.
Dead load on a structure is the weight of the permanent components such as beams, floor slabs, columns and walls.
2. Dead load = volume of member x unit weight of materials
Unit weight of materials
Material | Unit weight kN/m3 |
---|---|
Plain concrete | 23.5 |
Reinforced concrete | 24 |
Glass | 25.5 |
Mild steel | 77 |
Hardwood | 11 |
Softwood | 8 |
Volume of beam 10.0 x 0.6 x 0.3 = 1.8 m3
Unit weight of reinforced concrete = 24 kN/m3
dead load of beam = volume x unit weight
= 1.8 m3 x 24 kN/m3
= 43.2 kN
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