Composite joists create the longest spans possible for multi-story buildings
Composite joists (CJ-Series) create a stronger, stiffer, lighter and less expensive steel structure compared to other structural steel frame approaches. Considering all of its benefits, a composite joist floor system is ideal for multi-story construction.
Composite joists bond with the overlying concrete slab to create a unified load bearing system that deflects as a single unit. The two components are connected using field-applied shear studs that are attached through the composite steel deck to the joist top chord. The studs become embedded in the concrete after it is poured and cured. The concrete slab adds extra strength, allowing the joist top chord to be smaller and therefore reducing material because the joist alone does not support full design loads. Joists also can be spaced further apart, reducing steel, manufacturing, shipping and erection costs. Using a composite joist narrows the floor, creating more headroom, while allowing MEP routing options through the joist.