I am looking at a structure that is about 5 to 6 years old. The roof framing consists of 60 ft scissors trusses with piggyback trusses on top. The lateral bracing was insufficient and many of the trusses have buckled laterally. (See attached photo) The trusses were spaced 16 on centers and...
If you are adding the reinforcing plate while there is still some load on the existing beam, the reinforcement is only carrying the additional load. You can't just look at the total load supported by the total section modulus to get the bending stress in the beam.
Determine the stress (f1) in...
