The American Institute of Steel Construction task group, charged with considering model code changes in view of 2018 brittle fractures in twin built-up steel plate girders of vehicle bridges in San Francisco's Salesforce Transit Center, is recommending more than 30 modifications to AISC’s Specification for Structural Steel Buildings. One major recommendation is the addition of a section on brittle fracture and weld access holes.
The task group also advises addressing cyclic loading and strain-sensitive details and connections. And it suggests replacing a section on thermal cutting with new language to address inspection of cut surfaces other than bolt holes.