Summerbell Trusses can warp into some strange configurations when overloaded or without a balanced loading over the upper chords.
Over stressed lower chord
Mac or Easy-Bow Trusses that were designed or a roof load only can fail in many places
Sometimes a fire will be the cause of a repair or replacement of a truss
The most hazardous condition in damaged trusses is a broken upper chord.
Depending on the situation completely new trusses are in order.
One of the worst types of failures