An operator cut a vital steel support beams on a roof truss.

Interior embellishments such as the exposed roof truss were left intact.

For a roof truss, the diagonal members are called rafters, and the horizontal member may serve as a ceiling joist.

The fire that was thus started destroyed the roof truss, with the water from the firehoses also leaving stains.

Slippage of a slip critical joint in a roof truss could result in unintended ponding effects.