Product Code Database
In construction, a dwang (Scotland and New Zealand),"Dwang" def. 1. Cryer, Max. The Godzone dictionary of favourite New Zealand words and phrases. Auckland N.Z.:. London: Longman, Rees, Orme, Brown, Green & Longman, 1833. 39. Print. or blocking (North America), is a horizontal bracing piece used between to give rigidity to the wall frames of a building. Noggings may be made of timber, steel, or aluminium. If made of timber they are cut slightly longer than the space they fit into and are driven tightly into place or rabbeted into the wall stud. Although noggings between vertical studs brace the studs against buckling in compression they provide no bracing effect in shear stress, which requires diagonal bracing to stop the frame racking.
The interval between noggings is dictated by local and by the type of timber used; a typical Timber framing in a non-cyclonic area will have two or three noggings per storey between studs. Additional noggings may be added as grounds for later fixings and are supplemented by , window sill and jack studs to form openings.
Joist bridging, or blocking, is used between floor or ceiling joists, but this is to prevent the joists from twisting or rotating under load rather than to prevent buckling in compression. Herringbone strutting may replace blocking with smaller, timber battens fixed diagonally, in pairs, between joists.
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