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FormWork System

Formwork is a die or a mould including all supporting structures, 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 and live loads apart from its own weight.

The term ‘formwork’ includes the actual material contact with the concrete, known as form face, and all the necessary associated supporting structure.

INTRODUCTION TO FORMWORK

  • Formwork has been in use since the beginning of concrete construction.
  • New materials such as steel, plastics and fiberglass are used in formwork.
  • greater attention is being given to the design, fabrication, erection and dismantling of formwork

DEFENITION:

  • As a structure
  • Temporary which is designed to contain fresh fluid concrete
  • Form it into the required shape and dimensions.
  • Support it until it cures sufficiently to become self supporting.
  • Timber Form work

    The Timber formwork is one of the mostly used in construction industry, fabricated on site using timber. It is easy to produce but time-consuming for larger structures. Plywood facing has a short lifespan. Timber is easy to fix, remove and lightweight. Timber Shuttering is most flexible type of shuttering; it can be used for any shape and size. Timber shuttering should satisfy the following requirement:

  • Steel Formwork

    Steel formwork is now becoming popular due to its long life time and multiple time reuses. Steel formwork is costly but can be used for large number of projects. Steel shuttering give very smooth finishes to concrete surface. It is suitable for circular or curved structures such as tanks, columns, chimneys, sewer, tunnel and retaining wall.

  • Aluminum Form work

    Aluminum formwork is similar in many respects similar to those made of steel. Aluminum forms are lighter than steel forms due to low density and this is their primary advantage when compared to steel. The shuttering is economical if large numbers of repeating usage are made in construction. The disadvantage is that no alteration is possible once the formwork is constructed.

  • Plastic Formwork

    Plastic form work is a lightweight modular, interlocking system and can be used more than 100 times. It can be used for simple concrete structures. This type of shuttering is becoming popular for similar shape and large housing scheme.

  • Fabric Formwork

    Fabric formwork is emerging technology in shuttering industry for construction of irregular shape and complex member. The flexibility of this material makes it possible to produce concrete at any shape.

  • Coffor Formwork

    Coffor is a stay in place formwork system. It is composed of two filtering grids which is reinforced by vertical stiffeners and linked by articulated connectors which can be folded to transport on site. Coffor remains in place after concrete is poured and acts as reinforcement. Coffor is transported to the site prefabricated from the factory. This type of shuttering can be used for any type of structure like houses, multistory buildings etc.

  • Wall Form work

    Wall formwork used for concreting of shear or RCC wall in dams, wing walls, basement rcc walls etc. Wall shuttering made up of vertically arranged upright timbers (bearers) to which plywood sheeting boards are nailed at the inner side. The upright timbers are diagonally braced with the help of boards at both sides.

  • Beam Form work

    Beam is the most important member in RCC framed structure. Beam formwork has prefabricated form work includes sheeting bottom and side sheeting panels. The individual parts of form-work are manufactured based on the beam size. For prefabrication of the sheeting parts, a table for fabrication must be manufactured on site.

  • Foundation Form work

    Foundation formworks designed according to foundation type. Shuttering design for foundation depends on foundation type like footing, combined footing, raft. Basically there is a difference in the design for individual foundations, and shuttering for strip foundations. The design of shuttering is dictated by the size, mainly by the height of the foundation.

  • Column Formwork

    Formwork arrangement for column may differ on the basis of column outline like rectangular, circular, and hexagonal or any other shape. The sheeting of column shuttering is constructed according to the column dimensions. The panels are placed in a foot rim, anchored in soil with the help of bolts.