Double Joist Design for Mechanical Equipment Based on NDS 05 / NDS 01, ICC PFC-4354 & PFC-5803
When incorporated into a floor framing system, joists serve to provide stiffness to the subfloor sheathing, allowing it to function as a horizontal diaphragm. Joists are often doubled or tripled, placed side by side, where conditions warrant, such as where wall partitions require support.
