Supply of Marine-Grade Double and Triple Sheave Rigging Blocks

The contract calls for the manufacture or supply of 10-inch double, double strop, and triple sheave rigging blocks specifically designed for heavy-duty running rigging on the historic vessel Balclutha. The blocks must be constructed with shells made from either white oak or ash, ensuring durability and historical authenticity, while the hardware components include galvanized ironwork, 316 stainless steel pins, and hot-dip galvanized steel straps to resist corrosion in marine environments. The specifications reflect a high standard of craftsmanship and material selection appropriate for preserving and maintaining a heritage vessel’s operational integrity under demanding conditions. This subcontract is designated as a Total Small Business Set-Aside under the SBA guidelines, ensuring that only small businesses are eligible to respond. It falls under the NAICS code 332999 for Other Miscellaneous Fabricated Product Manufacturing and was posted on July 27, 2026, with a response deadline of August 10, 2026. The contracting authority is the Department of the Interior through its Pwr GOGA(86000) office, with performance likely tied to the restoration or ongoing maintenance needs of the Balclutha, though the exact location is unspecified. All materials and construction methods must align with maritime preservation standards, blending traditional boatbuilding techniques with modern corrosion-resistant hardware to meet both functional and historical requirements.