This is a Design-Build project to replace the roof of a historic, steel-and-concrete building (Building 11551) originally constructed in the early 1940s. The work involves removing the existing built-up roof from a large barrel section and three lean-to sections, then installing new roofing assemblies. The barrel roof will receive a new 3-ply SBS-modified system, while the lean-to sections will get new 90-mil EPDM roofing. A site visit is scheduled for 8 June at 11:00 AM local time at the building. The location for performance is Building 11551, though no budget amount or submission timeline is specified.