CS454 Loads

A file containing loads drawn from CS454 can be downloaded here. 

This file was last updated 21 April 2022, to correct an error in the 7.5 tonne reduced impact case, and a superficial error elsewhere. It will be included as a standard load file in the next release of Archie-M.

CS454 loads for masonry bridges are very similar to those from BD21, the differences are mostly, but not entirely, of terminology (for example in use spacing between axles rather than axle spread).

The new load file contains a more comprehensive set of single axle loads. 

Lift off can be applied to loads in the Archie-M user interface, but loads with lift-off are included in the file so they can be included in autorun. Similarly, loads can be reverse in the user interface, but they are not reversed by autorun, so lift off and impact loads are provided in symmetrical sets. 

CS454 introduces the possibility of a reduced impact factor. We would argue that the repair cycle for road surfaces is unconnected with the assessment cycle of bridges, and in particular that the condition of a road surface could deteriorate dramatically within an assessment cycle. It is difficult to see how use of the reduced factor would be justified. For completeness, however, reduced impact loads are included.

Also available is a general review of CS454.