JoistRite Span Lookup Tool




  1. Values shown in table are the least of strength and deflection limits without regard to the composite contribution of facing materials.
  2. Web stiffeners are required at all support and concentrated load locations and the minimum end bearing shall be 1 1/2”.
  3. Joists shall be restrained against rotation at each end and shall be attached to track components or restrained by the installation of lateral bracing.
  4. Applications involving multiple spans, cantilevers, concentrated loads, impact loading, etc., shall be investigated separately.
  5. Compression flange shall be braced by the attachment of continuous diaphragm-rated sheathing or decking. Additionally, mechanical bridging shall be completed before loading the floor/roof system.
  6. Verify fire ratings for any load reductions.