Gravity loads one one-way decks and gravity loads on two-way decks are treated separately in the program. One-way load distribution is enforced for gravity loads on one-way decks so that beams, columns, braces and walls are loaded with gravity loads (including dead and live loads) but they are not applied to meshed diaphragm. This is the same treatment as used for rigid diaphragms with one-way decks.

Gravity loads for two-way decks are more involved process. Analysis with Two-way Slabs: Out-of-Plane Stiffness (Bending) provides more information.

For other load cases (including notional, and virtual load cases), applied diaphragm loads are uniformly distributed to nodes on semirigid diaphragms.