Specifications_-_Stanford_Bridge_Replacement.pdf

Cuyahoga Valley National Park

Stanford Bridge Replacement

NATIONAL PARK SERVICE

INTERIOR REGION 3,4,5

OHIO MAJOR ACQUISITION BUYING OFFICE

Price must include shipping

Scope

These specifications are for a fully engineered clear span bridge of Fiber Reinforced Polymer (FRP) composite construction and shall be regarded as minimum standards for design and construction.

Qualified Suppliers The bridge manufacturer shall have been in the business of design and fabrication of bridges for a minimum of five years and provide a list of five successful bridge projects, of similar construction, each of which has been in service at least three years. List the location, bridge size, owner and contact reference for each bridge.

GENERAL FEATURES OF DESIGN

Span

Bridge span will be 35' 00" (straight line dimension) and shall be measured from each end of the bridge structure.

Width

Bridge width shall be 4’ 0" and shall be measured from the inside face of structural elements at deck level.

Bridge System Type Bridges must be designed as a FRP Composite Truss

Member Components

All members shall be fabricated from pultruded FRP composite profiles and structural shapes as required.

Camber Bridge must be precambered to eliminate initial dead load deflections.

ENGINEERING

Structural design of the bridge structure shall be performed by or under the direct supervision of a Licensed Professional Engineer and done in accordance with recognized engineering practices and principles.

MATERIALS

FRP Composites

• FRP bridges shall be fabricated from high-strength Eglass and isophthalic polyester resin unless otherwise specified.

• Weathering and ultraviolet light protection shall be provided by addition of a veil to the laminate construction. Minimum material strengths and properties are as follows:

• Tension 33,000 psi

• Compression 33,000 psi

• Shear 4,500 psi

• Bending 33,000 psi

• Young’s Modulus 2,800,000 psi

The minimum thickness of FRP Composite shapes shall be as follows unless otherwise specified:

• Square tube members (closed type shape) shall be 0.25 in.

• Wideflange beams, channel sections, and angles (open type

• shapes) shall be a minimum thickness of 0.25 in.

• Standard plate shall be a minimum thickness of 0.25 in.

Decking Wood decking is No. 2 Southern Yellow Pine treated according to the American Wood Preservers Bureau. Standard 3 in. x 12 in. planks to be provided for equestrian and light vehicle type loading conditions as required. High strength E-glass/ isophthalic polyester resin planks or recycled plastic deck planks can also be provided as required.

Hardware Bolted connections shall be A307 hot-dipped galvanized steel unless otherwise specified.

Mounting devices shall be galvanized or stainless steel.

FABRICATION

Tolerances All cutting and drilling fabrication to be done by experienced fiberglass workers using carbide or diamond-tipped tooling to a tolerance of 1/16". No material deviations beyond industry standards are accepted. All cut edges to be cleaned and sealed.

RAILINGS

Railings for pedestrian/ Bicycle shall be standard42” high use should shall meet ADA specifcations, 4” maximum spacing

Safety Rails

Continuous horizontal midrails shall be located on the inside of the trusses.

FINISHING

Bridge color shall be determined by the client with green, grey, and as standard options. No painting is required as the color is added during the manufacturing process.

DELIVERY

60 days after award

Bridge shall be delivered to:

Cuyahoga Valley National Park Virginia Kendall Maintenance Area 900 Truxel Road Peninsula, OH 44624