How Structures Work by David Yeomans

Author:David Yeomans [Yeomans, David]
Language: eng
Format: epub
ISBN: 9781119012283
Publisher: Wiley
Published: 2016-01-11T00:00:00+00:00

We can see from Figure 6.11 that the structure is built up from a set of repeated frames, each comprising a pair of studs rising from wall plate to eaves, floor joists and collar-braced rafters. The joists appear to be carried on ledges, although the nailing to the studs would have transmitted the load. The frames have no lateral stiffness, except what little might be provided by the nailing, and the whole thing has no longitudinal bracing. Some drawings of this form of construction show a pair of braces across a bottom corner, which would have served to keep the frame stable during construction, but once complete more than that would have been required to resist wind loads. This type of framing must have relied upon the cladding for stiffness as the frames have little lateral stiffness. Presumably the upper floor and possibly the roof, if it had sarking boards, acted as a diaphragm to transmit loads to the end walls. Seen like this, a balloon frame house might be thought of as acting something like a big cardboard box. In the twentieth century the availability of plywood, and then other sheet materials, has made timber framing using light studding a popular form of construction. This can take the form of either platform framing or balloon framing, each having its own advantages.

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