Redwood National Park, 1111 Second Street, Crescent City, CA 95531

54 -- 2 FIBER REINFORCED PLASTIC BRIDGES SOL 1443RQ848098004 DUE 113098 POC Lyn Giddings 707-464-6101 extension 5041 E-MAIL: National Park Service, Redwood National Park, lyn_giddings@nps.gov. Supplier shall furnish and deliver to Redwood National Park, two (2) FRP foot and horse bridges with a clear span of 80' and a clear walkway width of 5', and no overhead obstructions over the walkway. The supplier shall provide certification prior to delivery that the bridge design has been prepared and has been stamped by a Licensed Civil or Structural Engineer. Wood decking will be provided and installed by the National Park Service. FOOTING DESIGN 1. The supplier shall provide footing requirements, footing loads and dimensional details for the National Park Service to use in designing footings. Engineering design and construction of the bridge supporting foundations will be the responsibility of the National Park Service. ENGINEERING Specifications 1. The bridges will be used exclusively for foot and horse traffic, and shall be designed for a minimum live load capacity of 60 pounds per square foot on the decking. Wind loading shall be a minimum of 20 pounds per square foot on the open structure. Thesupplier shall contact National Park Service to develop appropriate additional loading for snow on the structure prior to completing the engineering certification submittal. 2. The supplier shall provide to the NPS required sizes and thickness of wood decking. The NPS will supply and install redwood decking from in-Park sources. 3. Allowable Design Stresses: Factors of safety used by contractor in the design of FRP support structures shall be as follows: (based on ultimate strength of the FRP material) Tension -- 2.5 Compression -- 2.5 Shear -- 3.0 Bending -- 3.0 Bearing -- 3.0 Deflection: Live Load = L/360 Dead Load & Live Load = L/180 Vibration Requirements: Minimum frequency of the system shall not be less than 5 cylces/second. Minimum material specifications (ultimate strength and Young's Modulus) are as follows: Tension -- 20,000 psi Compression -- 20,000 psi Shear -- 5,500 psi Bending -- 20,000 psi Young's Module (E) -- 2,500,000 psi MATERIALS All metal hardware to be treated with hot dipped galvanizing or similar treatments for installation in extremely wet and marine environments. Contractor shall provide all materials necessary for complete assembly of bridges, including all fasteners. Bridges shall be fabricated from high strength E-glass and isopthalic polyester resin. Weathering and ultraviolet light protection shall be provided by addition of a Nexus Veil to the laminate construction. DELIVERY AND ERECTION The placement of the bridge will be the responsibility of the NPS. The Contractor shall provide complete written procedures and instructions for assembling and installing the bridges to the NPS at the time of delivery. Posted 10/29/98 (W-SN266805). (0302)

Loren Data Corp. http://www.ld.com (SYN# 0223 19981102\54-0001.SOL)