Document Information

Document Type: FAQ

Product(s): LEAP BRIDGE STEEL

Version(s): All

Original Author: Bentley Technical Support Group - VM

QUESTION: How does Leap Bridge Steel Calculate the Live Load effects, AASHTO formula or Incremental Live Load Analysis?

ANSWER:

Leap Bridge Steel performs Live load Analysis either by Line girder or Grillage methods by user selection. For Line girder (Similar to Leap Bridge Enterprise) Leap Bridge Steel computes the Live load distribution factors using the AASHTO Formulas.

For Grillage Analysis the entire bridge deck is modeled and analyzed so there are no AASHTO Live load distribution formulas involved.

Leap Bridge Steel does apply the multiple presence factors per the AASHTO Specification for grillage Analysis .