Product Description

STAAD.beava, the bridge engineering automated vehicle application, is an integrated offering inside the STAAD.Pro environment. STAAD.beava uses 3D influence surfaces, which are generated by STAAD.Pro as part of the loading process. STAAD.beava will automatically generate influence surfaces for effects such as bending moments on members, support reactions, element stresses and nodal deflections.

Prior to STAAD.beava, the process of load application for a bridge deck was complex since governing rules can impose inter-dependant parameters such as loaded length on a lane, lane factors and load intensity. To obtain the maximum design effects, engineers had to try many loading situations on a trial and error basis.

STAAD.beava helps to reduce the frustration from the trial and error process and then proceeds to follow the selected design code and calculate the number of traffic lanes, influence lines along the centerline of the traffic lanes, loaded length along the lanes, critical locations of all knife, UDL and vehicular loads, and the maximum and associate effect values. All results are displayed graphically including the critical position of the vehicle along the traffic lanes.

All relevant code instructions for loading definitions and traffic lane calculations are incorporated in STAAD.beava, and in cases where vehicle axle arrangements are not standard, it is possible to define a vehicle and save it in the library for future analyses.

Feature List

  • Generation of critical patterns of vehicular loads producing extreme effects in structural components.
  • 3-D influence surface diagrams for design optimization and quick results verification.
  • Full integration with Pro. STAAD.beavagenerated loads can be easily merged with any other live or dead loads defined in the model, where each loading pattern represents a STAAD.Pro load case.
  • Support for AASHTO 2000 (ASD, LFD and LRFD), UK BS5400 Part II, and IRC:2000 Bridge Design Specifications with all relevant code provisions for loading definitions and traffic lane calculations incorporated.
  • Roadway definition can be completed in a few easy steps. Flexible user interface allows creation of straight, curved or custom-defined roadways on flat and super-elevated decks of any shape.
  • Traffic lanes are automatically created. Alternatively, fully customizable lanes may be specified by the user.
  • Vehicle database includes pre-defined loadings (H, HS, and HL designations). User-defined loadings may be added to the database as needed.
  • Load application algorithms include transverse movement of loads, jack-knifing of trucks within curved lanes, turning off axles not contributing to extreme effects.
  • Program calculates the following:
    • number of traffic lanes,
    • width and length of traffic lanes,
    • positions of truck or tandem wheels within lanes,
    • size and locations of uniformly distributed loads,
    • locations of concentrated loads,
    • values of responses for critical loading conditions.
  • Output in any unit system.
  • Powerful, intuitive graphical user interface. Loading patterns can be shown graphically on the model.
  • All results are easily accessible through an integrated load browser. A complete text output is also available.


Potential Users


  • Structural Engineers
  • Consulting Engineers
  • Engineering Consultants

Firm Types

  • Structural engineering firms
  • Structural consultants
  • Multi-disicpline E/A and A/E
  • Departments in construction companies, owner/operators, and government agencies