I am modeling a bearing wall building with concrete cores as the lateral system. When I run ram frame, gravity load only with P-Delta effects ignored I get an instability warning at level 1, right in the center of a stair core. If I delete the stair core…

Hello, Is there a way to model two openings on both sides of a beam in RAM Modeler? The overhang of the slab is 10 inches. On the figure, the beam number is shown.