A06_-_Specifications_02212023.doc

White Cedar Swamp Boardwalk Repairs

White Cedar Swamp Trail Boardwalk Repairs

CAPE COD NATIONAL SEASHORE

99 Marconi Site Road

Wellfleet, MA. 02667

1.0 Background

Cape Cod National Seashore seeks materials to make repairs to the White Cedar Swamp Trail Boardwalk.

1.1 Base Proposal Quotes:

See Price Schedule

2.0 Plastic Lumber Specifications

2.1 Description

2.1.1 Structural plastic lumber shall be manufactured with HDPE and fiberglass elements to act as reinforcement with HDPE. Lumber shall be molded in one piece per specified size. All materials will have UV additives to prevent deterioration of the plastic lumber from exposure to UV light. HDPE will be made up of recycled material; both post-industrial & post-consumer, excluding additives and colorants. Finished plastic lumber will not rot, split, crack or splinter for a minimum of 50 years. It shall be resistant to termites, marine borers, salt spray, oil and fungus. All lumber light gray in color.

2.2 Terminology

2.2.1 Recycled Plastic Lumber (RPL) – Recycled plastic lumber is defined as molded plastic supplied in traditional dimensional lumber sizes and manufactured using at least 50% recycled materials.

2.2.2 High Density Polyethylene – (HDPE) – Defined as a stiff plastic resin used extensively by the food industry to mold bottles and trays. This resin is resistant to most chemicals and absorbs almost no moisture making it an excellent building material.

2.2.3 Structural Grade Plastic Lumber (SGPL) – Structural Grade Plastic Lumber is primarily standard recycled plastic lumber, with fiberglass strands and rebar rods added to increase structural strength. It should be noted along with increased strength, added benefits of (SGPL) are reduced creep deformation and reduced expansion and contraction due to temperatures changes.

Plastic Lumber Specifications, Continued English

Metric

Test

ASTM Test Value Units Value Units

Flexural Strength

D6109

2750 PSI

193 Kg/cm²

Compression Strength Parallel to grain

D6108

2842 PSI

200 Kg/cm²

Compression Strength Perpendicular to grain D6108

1482 PSI

104 Kg/cm²

Specific Gravity

D6111

0.93 g/cc

0.93 g/cc

Average Screw pull out

D6117

646 Lbs 293 Kg

Tensile test (skin)

D638

3623 PSI

254 Kg/cm²

Shear Strength

D2344

800 PSI

56 Kg/cm²

3.0 Itemized List

3.1 Materials

UOM

Description

Specification

EA

2" x 8" x 10'-0"lg, Structural plastic lumber (light gray in color)

EA

5/4 x 6 x 12'-0"lg , Decking

Composite Decking (light gray in color) with Wood Grain “non-slip” surface

3.2 Fasteners and Ties

UOM

Description

Specification

Box #10 x 2-3/4 “ Deck Screws , 1000/Box Stainless Steel Sharp Point, Cap Head, Undersized #2 star drive Head, Box QuickDrive DCU234S305 #10 x 2-3/4” Stainless Steel Collated Decking Screws, 1000 per box

4.0 Submittals

4.1 The vendors quote shall include detail of material and product specifications as described in items no. 2 & no. 3 above.

Tread on 5/4 x 6 x 12'-0"lg , Decking

Plan (Top) View

Tread on 5/4 x 6 x 12'-0"lg , Decking

Front (Long) View

White Cedar Swamp Trail Boardwalk Repairs