FORMWORK, SCAFFOLDING, CENTERING

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TOPICFORMWORK, CENTERING & SCAFFOLDINGBy :- Tanmay B. Shetye

Formwork is a mould including all supporting structure , used to shape and support the concrete until it attains sufficient strength to carry its own weight.It should be capable of carrying all imposed dead & live loads apart from its own weight.

FORMWORK

Formwork is commonly made of * Steel * Timber

STEEL FORMWORK

TIMBER FORMWORK

Formwork has been in use since the beginning of concrete construction.New materials such as steel, plastics & fibreglass are used in formwork.Greater attention is being given to the design, fabrication, erection, and dismantling of formworkFormwork is designed according to the ACI document SP-4.

FIBREGLASS FORMWORK

It should be water tight.

It should be strong.

It should be according to the size of member.

Its contact surface should be uniform.* Qualities of formwork

The material should be cheap and reusable.

Swelling and shrinkage should be minimum.

Deflection should be minimum.

Light in weight , so that easy to transfer.* Requirement of Formwork

Wall * Chimneys Column * Water tankSlabs & Beams * Cooling towersStairs etc. * Uses of Formwork

A temporary elevated platform to stand safely and carry on the construction.Provide platform to keep necessary materials of construction , tools such as bricks, mortar, trowel, plumb bob, etcScaffolding is also needed for the repairs or even demolition of a building. SCAFFOLDING

SCAFFOLDING

Standards LedgersBracesPutlogBoardingGuard boardTie board

Components of scaffolding

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