When introduced in 2005, AISC Prequalified Connections covered three connection types: reduced beam section (RBS ... adds prequalified details for bolted flange plate (BFP) moment connections ...

It enables efficient connections between API 6A standard flanges, including wellhead flanges, BOP and pressure test flanges. It can also be applied to flange connections in other mechanical systems.

“There was no appreciable difference in cost between cellular and wide-flange beams. While cell beams cost more to fabricate, the reduction in interior columns and associated connections offsets ...