← Glossary
Roof trusses

Fan truss

A fan truss has webs that fan out from points on the bottom chord to the top chord, giving the top chord extra support.

Also known as fan truss, fan roof truss, fan web truss

The fanned webs support the top chords at more points than a fink truss does. That suits roofs with heavy coverings such as tiles, or longer spans where the top chords would otherwise need to be much deeper.

It is a variation of the fink truss rather than a separate family, and it is often chosen by the truss design software when loads demand it.

Related terms
Fink trussA fink truss is the standard pitched roof truss, with internal webs arranged in a W; it is the most widely used truss type for houses. Howe trussA Howe truss has vertical webs and diagonals that slope towards the centre, a pattern used for longer spans and heavier loads. Top chordThe top chord is the upper, usually sloping member of a truss that forms the roof slope and carries the roof covering.
From term to production line

Talk to Randek

Building this at scale? Tell us what you produce and we’ll point you to the right system.

Talk to your team Back to the glossary
Talk to your team