RAM Structural System Help

Beam Line Force Envelope

This report provides the Dead Load, Live Load and Roof Live Load beam forces at five stations for the selected beam line beams. When live load is skipped a maximum and minimum force value is given at each of the output stations for live load. Refer to Section 3.5.2 for an explanation of how the beam forces are calculated. These forces are combined with lateral forces in RAM Concrete Beam mode to produce the final design envelopes.

The output is provided at the quarter point and midpoint of the beam, measured from the full centerline-to-centerline distances. The first and last (0% and 100%) stations are at the face of the column where a beam is supported by a column and otherwise at the centerline. Note that within each beam line the beams (output) are sorted in the order they occur in the beam line. If the orientation of any beam is opposite to the direction of the beam line, the forces will still be output in the direction of the beam line.

All live load values have already been reduced by the applicable live load reduction factors. Even though the envelope values are calculated for cantilever beams the forces are only provided for the back-span and not the cantilever span.

In the case of a hyperstatic column load being introduced by RAM Concept report may show an additional hyperstatic set of forces. It is important to note that these hyperstatic forces on the beams are NOT the hyperstatic beam forces that exist in the beams in RAM Concept due to the Concept Analysis. Rather, they are the forces that exist in the beams as a result of the RAM Concrete analysis due to the Hyperstatic forces in the columns that were exported from Concept into the RAM Structural System.