RAM Structural System Help

Effects of Sloping Framing

In RAM Modeler, Surface and Line Live loads that are applied to sloping framing areas should be assigned magnitudes equivalent to their projected area loads (for Surface loads) and projected length loads (for Line loads). Live Loads specified in most building codes are already specified as projected area loads, so no modification is necessary. Dead Loads should be input as the actual loads, based on the actual weights; the program accounts for the effects of sloping. The figure in Loads on Slab Edges (One-Way Slab Systems) shows how beam Live loads are dealt with in the RAM Structural System. Figure (A) shows the load as applied by the user. The load is then transformed to calculate the load per unit length along the member, as shown in Figure (B). The load is transformed again to calculate both the perpendicular and axial components along the member, as shown in Figure (C). In RAM Frame both the perpendicular and axial components are considered in the analysis and design. See Live Load Reduction for more information on the effects of sloping framing on Live Load reduction for Roof Live Loads.

Handling Loads on Sloped Members