Lvl

Laminate

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Beams, columns, vehicle decking, door and window frame, formwork system, flanges of I-joists Industrial, commercial, recreational, residential and institutional

Length: up to 24 m Width: 19-90 mm Depth: 200-600 mm up to 2.5 m available

TimberStrand

Composite

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Beams, columns, truss members, headers, portal frames, post and beam systems

Industrial, commercial, recreational, residential and institutional

Length: up to 14.6 m Width: 45-140 mm Depth: 1220 mm

Parallam

Composite

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Beams, columns, truss members, headers, portal frames, post and beam systems

Industrial, commercial, recreational, residential and institutional

Length: up to 20 m Width: 45-275 mm Depth: 200-475 mm

I-joists

System

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Floor and roof joists, formwork, ceiling ties, load-bearing stud wall units, available as complete systems (cassettes).

Industrial, commercial, recreational, residential and institutional.

Length: up to 15 m Width: 38-97 mm Depth: 0.2-0.6 m

Box beams

System

Industrial and residential buildings

Spans of 30-40 m are possible with portal frames

together as a composite construction. For example, floors in two-storey domestic buildings require modified 30-min fire resistance (30-min load-bearing, 15-min integrity and 15-min insulation). In general, a conventional suspended timber flooring system comprising 12.5mm plasterboard taped and filled, T&G floor boarding with at least 16 mm thickness directly nailed/screwed to floor joists, meets this requirement provided that where joist hangers are used they are formed from at least 1-mm-thick steel of strap or shoe type. Further information on fire safety and resistance is given in Section 1.11.

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