Unbalanced Loads and Critical Distribution of Loads
- In cases where member continuity occurs such as:
- Care must be taken to investigate all loading conditions, (e.g. alternate span loading), to find the critical shear, moment, and deflection values.
- According to '97 UBC 1607.2 and
1607.4.2 for roof design, we could encounter this situation with
either overhanging beams or cantilever beam systems when:
- Load case is Eqn 12-8 without snow: D + Lr
- Lr < 20 psf.
- In example, consider an overhanging roof beam from a flat roof structure located in Phoenix, AZ. The beam supports
a tributary width of 22 feet and the basic roof dead load is 12 psf. Determine the critical load distribution for load
case 1.
- Beam model.
- Loads.
- Possible load diagrams.
- Beam model.
