Site visit scheduled for 8 June at B11551 at 11:00AM (Local Time). Building 11551 is a one-story, 75,000 square feet (SF) building framed primarily out of steel and cast-in-place concrete. The building was originally constructed in the early 1940s and is a historic property eligible for listing on the National Register of Historic Places. The main open space is 200-ft by 229-ft with a high barrel roof section that?s approximately 50,500 SF. Additionally there are three (3) low slope roof lean-to sections. The West lean-to section is approximately 36-ft by 268-ft,with the East lean-to section at approximately 36-ft by 229-ft. The East side shall include an addition that is approximately 35- ft by 38-ft. The South lean-to section is approximately 36-ft by 180-ft. This Design-Build project will remove the existing built-up roof (BUR) from both barrel center section and the three (3) lower roof lean-to sections down to the existing structural decking. New 3-ply SBS-Modified BUR roof assembly with granular cap sheet on the barrel roof section shall be installed and the three (3) lower roof lean-to sections shall be replaced with new 90-mil Ethylene Propylene Diene Monomer (EPDM) roof assemblies. All roofing assemblies shall be fully adhered. Replace existing roof drains, flashings, vent pipe flashing, cover board, insulation, vapor barrier, cant strips, metal copings and trim with new.