Ensure the model fulfils design requirements before you start the design.
Composite Beam Design Extension requires that beams, slabs and loads from the Robot model to be designed must fulfill the following requirements.
Beams
- Must be linear.
- Must be AISC Standard Wide Flange shapes.
In Robot, select the AISC section database.
In Robot, select Tools > Job Preferences > Databases > Steel and timber sections. From the database list, select AISC 14.0 (American hot rolled shapes), and click OK.
- Must be in plane.
- Cannot cross other beams.
- Cannot form a circular bearing chain with other members.
- Slab and all beams must be associated with the same level.
Slabs
- Slabs must be one-directional.
- Exactly one slab reinforcing all members in one selection group.
- Entire design area must be within slab (no edges inside design area).
- Slab must be planar (no warped slabs).
Loads
- All point and line loads must be applied to a member in the design area.
- Point loads are not counted if they are applied to the end of a member, they are assumed to be supported by whatever is supporting the member.
- Point loads at the intersection of more than one member are applied to the first qualifying member only.
- Only the component of a load normal to the plane of the design area will be included in the design.
- Area Loads can be applied to any slab area and can vary in up to one direction. The extension does not support loads tapered in more than one direction.
- Load from columns are not taken into account. Concentrated loads must be defined by the user.