According to the new span tables and IRC provisions, cantilevers can extend up to one-fourth the backspan of the joist. This means that joists, such as southern pine 2x10s at 16 inches on-center, spanning 12 feet are allowed to cantilever up to an additional 3 feet (see illustration, below).
What is the maximum deflection of a cantilever?
The deflection limit for cantilever beams set by most design codes is L/180 for live load and L/90 for combined dead & live load. The maximum span depends on the material of the beam (wood, steel or concrete).
What is the effective length of a cantilever beam?
2) effective depth of beam :- effective depth of the cantilever beam is the distance from the tension Steel to the edge of compression fibre. In other word it is also described as effective depth of beam is equal to overall depth minus the effective cover of reinforcement.