General Specifications

Span and Width

1. Span (center to center of bearing)
2. Width (inside deck width)

Loading

1. Uniform Live Load

  • Bridges up to 50' in length: 100 pounds per square foot.
  • Bridges over 50' in length: 60 pounds per square foot.
  • Special load conditions: ___ pounds per square foot.

    • 2. Vehicle Load

  • Bridges less than 8' inside width: 5,000 pound vehicle.
  • Bridges 8' and greater inside width: 10,000 pound vehicle.
  • Special vehicle load conditions up to HS20 available.

    • 3. Wind Load

  • All bridges: Designed for 30 pounds per square foot = to 100 mph wind.

    • 4. Design Stresses

  • In accordance with the "Manual of Steel Construction; Allowable Stress Design," as adopted by the American Institute of Steel Construction (AISC), latest edition.
  • In accordance with the "Standard Specifications for Highway Bridges" by the American Association of State Highway and Transportation Officials (AASHTO)- latest edition.

    • 5. Camber

  • Yes (up to 5% can be provided)
  • No (bridge cambered slightly to offset dead load)

    • 6. Shop Drawings

  • Shop drawings shall be unique drawings, prepared to illustrate the specific portion of work to be done.
  • All drawings shall be signed and sealed by a Professional Engineer registered in the state of destination.

    • 7. Material

  • Self weathering steel: ASTM A847, A588 or A242, A606 tubing (Fy = 50,000 psi)
  • Painted steel: ASTM A36, A500 tubing (Fy = 36,000 psi)

    • 8. Decking

  • 2" Pressure Treated Southern Yellow Pine.
  • 3" Pressure Treated Southern Yellow Pine.
  • Galvanized 22 gauge pan for concrete slab (concrete by others)
  • Recycled Plastic Plank Deck (nominal 2" thick).
  • Floor Grating
  • Other

    • 9. Toe Plates

  • Yes (6" x 1/4" Toe Plate, 2" above deck level)
  • No

    • 10. Top Hand Railing

  • 2" Pressure Treated Southern Yellow Pine.
  • 2" Recycled Plastic Plank.
  • Galvanized pipe.
  • Aluminum pipe.

    • 11. Intermediate Railings

  • 2" Pressure Treated Southern Yellow Pine.
  • Steel angles to match finish of bridge (painted or self-weathering).
  • Vinyl coated or galvanized fencing on sides or sides and top.
  • Vertical maximum spacing of ___ inches.
  • Horizontal maximum spacing of ___ inches.

    • 12. Options

  • Custom options available upon request.

    • 13. Finishes

  • Self-weathering bridges: All steel to be cleaned in accordance with Steel Structures Painting Council (SSPC) specifications No. 6 for commercial blast cleaning.
  • Painted steel bridges: In addition to above, will be painted with one coat of primer and minimum two coats of rust inhibitive paint. Touch up paint shall be furnished with bridge.

    • 14. Fabrication

  • Workmanship, fabrication and shop connections shall be in accordance with AASHTO and AISC standard practices.
  • All welders shall be qualified in accordance with AWS D1.1 structural welding code.

    • 15. Delivery

  • Bridge shall be delivered by truck to a location nearest the site accessible by roads.
  • Optional delivery methods available upon request.
  • Unloading, splicing (if required) and placement of bridge shall be the responsibility of the owner.
  • Optional unloading, splicing and placement of bridges available in limited geographical locations. Ask for details.

    • 16. Foundations

  • Engineering design and construction of the abutments shall be the responsibility of the owner.
  • Anchor bolt locations and bridge support reactions shall be provided by MBI.
  • Optional abutment design available (soil tests and geotechnical information to be provided to MBI by others).

    • Marine Bridge & Iron
    208 West Church Street
    Utica, IN 47130
    Toll Free: 1-800-822-4535
    Telephone: (812) 283-7932
    Fax: (812) 282-1485
    Email: bridges@marineworks.com