Supplier of Aircraft-Rated Electrical and Communication Manhole Covers

This subcontract, managed by the Aviation Project Management Group, seeks a supplier to provide aircraft-rated solid covers for electrical and communication manholes for prime contractors operating on Port of Seattle airfield projects. The supplier is responsible for manufacturing flange-up covers in 30, 36, and 42 inch sizes that strictly adhere to NFPA 70 Article 100 and ASTM C 858 standards. To ensure airfield safety and durability, all products must be capable of supporting 100kips at 250psi tire pressure. Compliance requirements include the provision of Buy American certification and technical drawings stamped by a Washington State Professional Engineer. The selected vendor will be responsible for delivering completed frames and covers on an FOB Destination basis. Interested parties must submit their responses by the deadline of November 23, 2026.