Скачать или смотреть Types of Formwork | construction | building, bridges

The construction of formwork takes time and involves expenditure up to 20 to 25% of the cost of the structure or even more. The design of these temporary structures are made to economic expenditure. The operation of removing the formwork is known as stripping. Stripped formwork can be reused. Reusable forms are known as panel forms and non-usable are called stationary forms.

Timber is the most common material used for formwork. The disadvantage with timber formwork is that it will warp, swell, and shrink. The application of water-impermeable cost to the surface of wood mitigates these defects.

Requirements of Good Formwork

It should be strong enough to withstand all types of dead and live loads.

It should be rigidly constructed and efficiently propped and braced both horizontally and vertically, to retain its shape.

The joints in the formwork should be tight against leakage of cement grout.

Construction of formwork should permit removal of various parts in desired sequences without damage to the concrete.

The material of the formwork should be cheap, readily available, and should be suitable for reuse.

The formwork should be set accurately to the desired line, and levels should have a plane surface.

It should be as light as possible.

The material of the formwork should not warp or get distorted when exposed to the elements.

It should rest on a firm base.


#youtubeshorts
#youtube #
#youtuber
#learning #youtubeshort
#youtubechannel
#youtubeshort