Inconstruction, adwang (Scotland andNew Zealand),[1][2][3]nogging piece,nogging,noggin ornog (England andAustralia; all derived frombrick nog),[4][5] orblocking (North America), is a horizontal bracing piece used betweenwall studs to give rigidity to the wall frames of a building. Noggings may be made of timber, steel, or aluminium.[citation needed] 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.[6] Although noggings between vertical studs brace the studs againstbuckling in compression they provide no bracing effect inshear, which requires diagonal bracing to stop the frame racking.
The interval between noggings is dictated by localbuilding codes and by the type of timber used; a typicaltimber-framed house 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 bylintels,sills and jack studs to form openings.
Joist bridging, orblocking, is used between floor or ceiling joists, but this is to prevent the joists fromtwisting 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.[7]
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