Robot Structural Analysis Help | Design

Beam Selection Order

Controls the order of beams when they are automatically designed:

By Weight means that a combination of steel weight and studs is used to determine the optimum design.
By Depth means that the beam depth is used to determine the optimum design.

Minimum Beam Depth

Minimum allowable beam depth.

Maximum Beam Depth

Maximum allowable beam depth.

Maximum Span/Depth Ratio

Maximum allowable ratio of beam span to beam depth.

Percent Composite Limits:

Lateral-torsional buckling

Check Unbraced Beams for Lateral-Torsional Buckling
Lateral-torsional buckling analysis can be performed only for non-composite beams. For composite beams it is assumed that the beam is fully protected against lateral-torsional buckling. The capacity of the beam with lateral-torsional buckling is analyzed according to section F point F2.2 of the ANSI/AISC 360-10 code.

Specifies if lateral-torsional verification is performed in beam design. Specify the following parameters:
Unbraced Length Proportion (Lb / L)
Ratio of the maximum unbraced length on the beam to beam length. See Design Assumptions - Bracing.
Cb Factor for Backspans
You can specify Cb factor for simply-supported beams. The default value of this setting is 1.0. It applies to all beams.

Construction Dead. Construction Live.

Superimposed loads applied during construction but not to a finished structure.

Internal Forces.

Select a method of calculating internal forces:

Internal Engine
A default method recommended for all users. In a simplified way, the application estimates an influence surface on a slab and assigns loads from this surface to the beam supporting this slab.
Robot Structural Analysis
Recommended for advanced users. The application imports internal forces from the Robot model. If you select this method, the model must fulfill a different set of design requirements than those for the internal engine method.

Design