RAM Structural System Help

Compression Flange Bracing

The user may specify a number of parameters related to unbraced length considerations. These criteria are found in the Criteria - Flange Bracing command. Based on these criteria RAM Frame automatically determines the braced condition for each member. Unbraced lengths can also be directly specified by the engineer from the Assign menu as described in section 2.6. If overridden, the assigned values will be used for all checks on the assigned member. The program checks each unbraced segment to determine the controlling condition of moment and unbraced length.

In RAM Frame, in the calculation of axial and bending capacity of a member it is necessary to determine the unbraced segment lengths. There are four pertinent values: Lu in the major axis for axial, Lu in the minor axis for axial, Lu in the major axis for bending, and Lu in the minor axis for bending. All four values are listed in the Member Code Check report for beams.