Specifications include, but are not limited to: Design Drawings: Complete fabrication drawings must be prepared, signed, and sealed by Professional Engineers (as defined by the National Society of Professional Engineers) and whom are registered in the State of Washington with at least 5 years of experience in the design of bridges. All welding shall be done by welders certified in accordance with the requirements and qualifications test of the AWS. Bridges are designed in accordance with AASHTO LRFD Bridge Design Specifications and all subsequent interim specifications, current at the time of fabrication. All bridges shall not be Fracture Critical Members as defined by the US Department of Transportation Federal Highway Administration. Portable Detour Bridges shall be modular, weld-fabricated, integral steel sections in a side-by-side configuration. Spans under 60.0 feet shall be supplied in two side-by-side modules per bridge.