Glulam – Primary structures
Truss beams

Glulam – Primary structures
Truss beams

Glulam – Primary structures
Truss beams

Truss beams

For the realisation of larger spans in roof structures (> 30 m), lattice girders represent an architecturally appealing, economical and resource-saving alternative to solid wall girders made of glulam. The timber truss usually consists of continuous chords to which the diagonals and/or posts are hinged. A common and simple variant for forming these connections are bar dowel connections. Due to the predominant normal force stress in the struts and chords of such beams, the use of homogeneous glulam makes sense.

Technical
Data

Span > 30 m
Usual beam spacing (other dimensions possible) 5 – 7 m
Beam width (2 cm preferred dimensions each) 10 to 26 cm
Cantilevers possible
Height of components (for structural design) h = l/15 – l/10
Possible fire resistance classes R 30 > without problems
R 60 > with additional costs
Preferred strength classes GL 24h, GL 30h

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