Building Construction Handbook, Sixth Edition

Timber Frame Construction

Framing ~ an industry based pre-fabricated house manufacturing process permitting rapid site construction, with considerably fewer site operatives than traditional construction. This technique has a long history of conventional practice in Scandinavia and North America, but has only gained credibility in the UK since the 1960s. Factory-made panels are based on a stud framework of timber, normally ex. 100 50 mm, an outer sheathing of plywood, particle-board or similar sheet material, insulation between the framing members and an internal lining of plasterboard. An outer cladding of brickwork weatherproofs the building and provides a traditional appearance.

Assembly techniques are derived from two systems:-

  1. Balloon frame

  2. Platform frame

A balloon frame consists of two-storey height panels with an intermediate floor suspended from the framework. In the UK, the platform frame is preferred with intermediate floor support directly on the lower panel. It is also easier to transport, easier to handle on site and has fewer shrinkage and movement problems.

Typical Details~

Notes:

  1. Cavity barriers prevent fire spread. The principal locations are between elements and compartments of construction (see B. Regs. A.D. B3).

  2. Thermal bridging through solid framing may be reduced by using rigid EPS insulation and lighter I section members of plywood or OSB.

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