What is "trusses"

Usage examples of "trusses".

It would have been simple to collect the defective trusses and holey shingles, and then show a jury the right way to put on a roof.

Stunned, Carson saw other blooms of incredible fiery radiance exploding in the warehouse to the right and left of the lane where the helmeted man was still coming, each succeeding blast of the incendiaries throwing every detail of the high metal roof beams and trusses into stark relief, even as clouds of bright white smoke billowed above the shelving tiers.