Centering and shuttering
Shuttering is the temporary
ancillary construction used as a mould for the structures In which the concrete
is placed and allowed to hardened
These are classified as steel
wooden plywood combined woods steel, reinforced concrete and plain concrete
Requirements of shuttering
The material should be cheap and should be suitable for re use
several times
It should be practically water proof so that it should not
observe water from concrete
It should be strong enough to with stand all loads coming on
it
It should be stiff enough so that deflection is minimum
The surface of the formwork should smooth and it should afford
easy stripping
Loads on form work
Live load due to labour etc
Dead weight of wet concrete
Hydrostatic pressure of the fluid concrete
Impact due t pouring concrete
Shuttering for column
Components
Sheeting or column shutter all
around the column Yokes
Wedges bolt
The slab is continous over the beam
The boarding may be 4 to 5 cm thick for walls up to 3to 4m
high
The boards are fixed to 5cmX10cm posts known as struts are
soldiers
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