MI DNR Walkway Specs 11-22-17.docx

Sanilac Historic State Park, Caseville, MI - Elevated Boardwalk

General Specifications

1.0 GENERAL

1.1 Scope

These specifications are for a fully engineered clear span boardwalk of Aluminum or Fiber Reinforced Polymer (FRP) construction and shall be regarded as minimum standards for design or approved equal. Boardwalk components shall be modular to transport to remote project location, while maintaining no modular components exceed a weight of 150 lbs. per piece.

1.2 Qualified Suppliers

The boardwalk manufacturer shall have been in the business of designing and fabricating of boardwalks for a minimum of five years and provide a list of five successful boardwalk projects, of similar construction, each of which has been in service at least three years. List the location, boardwalk size, owner and contact reference for each boardwalk.

2.0 GENERAL FEATURES OF DESIGN

2.1 Span

Boardwalk span will be 54'-00" – 56’-00” (straight line dimension) and shall be measured from each end of the boardwalk structure.

2.2 Width

Boardwalk width shall be 4'-00" and shall be measured from the inside face of structural elements at deck level.

3.0 ENGINEERING

Structural design of the boardwalk structure(s) shall be performed by or under the direct supervision of a Licensed Professional Engineer or Architect and done in accordance with recognized best engineering practices and principles.

3.1 Uniform Live Load

Boardwalks spanning greater than 50’-0” will be designed for 60psf.

3.2 Wind Load

All boardwalks shall be designed for a minimum wind load of 25 psf. The wind is calculated on the entire vertical surface of the boardwalk as if fully enclosed.

3.3 Snow Load

Sustained snow load conditions for the project location shall be considered for a snow load of 35psf.

4.0 MATERIALS

4.1 Decking

Decking shall be provided and installed by owner.

4.2 Hardware

Bolted connections shall be aluminum, A307 hot-dipped galvanized steel or approved equal. Mounting devices shall be aluminum, galvanized stainless steel or approved equal.

5.0 SUBMITTALS

5.1 Submittal Drawings

Schematic drawings and diagrams shall be submitted to the client for their review after receipt of order. Submittal shall be within fifteen (15) calendar days after the purchase order is issued. All drawings shall be signed and sealed by a Professional Engineer or Architect licensed in the State of Michigan.

5.2 Submittal Calculations

As required, structural calculations shall be submitted to the owner. All calculations will be signed and sealed by a Professional Engineer or Architect licensed by the State of Michigan.

6.0 FABRICATION

6.1 Tolerances

All cutting and drilling fabrication to be done by experienced workers to a tolerance of 1/16". No material deviations beyond industry standards are accepted. All cut edges to be cleaned and smooth, no sharp edges.

7.0 RAILINGS

7.1 Railing height shall be a minimum of 42” above to 47” above the floor deck.

8.0 FINISHING

Boardwalk color shall be a milled aluminum finish or approved equal.

9.0 DELIVERY and ERECTION

Delivery is made by truck to a location nearest the site accessible by roads. Manufacturer will notify the client in advance of the expected time of arrival at the site. Boardwalks are shipped to the site in component parts or partially assembled depending on site requirements. The spans can then be completely assembled using standard hand tools. Upon request, boardwalks can also be shipped totally assembled to the site. Unloading and placement of the boardwalk will be the responsibility of the owner.

9.1 Erection Direction

For boardwalks shipped in component parts or partially assembled, the manufacturer shall provide assembly drawings and a recommended assembly procedure for assembling the boardwalk. Temporary supports or rigging equipment, if needed, is the responsibility of the owner.

9.2 Site Issues and Foundation Design

The client shall procure all necessary information about the site and soil conditions. Soil tests shall be procured by the client. The engineering design and construction of the boardwalk abutments, piers and/or footing shall be the responsibility of the owner.

10.0 WARRANTY

The manufacturer shall warrant the structural integrity of all materials, design and workmanship for a period of not less than 10 years. This warranty shall not cover defects in the boardwalk caused by foundation failures, abuse, misuse, overloading, accident, faulty construction or alteration, or other cause not the result of defective materials or workmanship. This warranty shall be limited to the repair or replacement of structural defects, and shall not include liability for consequential or incidental damages.