Braking Page
The braking load is applied according to braking forces chapter.
Nominal load per lane- the braking force for single vehicle stopping (FBS) shall be calculated as follows:
In accordance to AASHTO 3.6.4 is the greater of:
- 25% of the axle weights of the design truck/tandem or,
- 5% of the design truck/tandem plus lane load.
Height of application (h)
Define vertical distance from the superstructure surface,default 1.8 m.
Total line load
Calculated as (Nominal Load per Lane*Number of lanes *Multiple presence factor)/bridge length(with begin and end excess length).
Multiple presence factor
In accordance with AASHTO table 3.6.1.1.2-1 modify the vehicular live loads for the probability that vehicular live loads occur together in a fully loaded state.
Nominal Line load per lane
Calculated as Nominal Load per Lane/bridge length(with begin and end excess length).