Specifications include, but are not limited to: a. Frame Aluminum extrusions for dock, pier, and gangway structures shall be aluminum alloy 6061-T6 “E” channels extruded in accordance with the requirements of applicable sections of Federal Specifications QQ-A-200. Miscellaneous aluminum may be 6063-T5 or 5052-H32. b. Floatation Flotation shall consist of rigid polyurethane foam utilizing a two-component polymeric MDI system designed for Marine Flotation applications injected into aluminum shells to 2.0 pounds per cubic foot. The encased flotation compartment shall be filled by the froth-in-place methods under controlled temperature conditions or when the temperature is between 65 and 85 degrees Fahrenheit. Full Float dock flotation frame shall consist of a fully encased 6061-T6 box frame of similar design to the floating dock walking surface frame or a functionally-equivalent full float design. Aluminum is the preferred material for the full float due to its durability, but materials of similar durability will be considered. Expanded polystyrene flotation with or without polyethylene casings shall be prohibited. c. Fenders Wood side fenders shall be Southern Pine No. 1 Structural (1200# extreme fiber bending) Stress Grade with a minimum CCA content equal to 0.40 pounds per cubic foot or equal. All wood shall comply with American Softwood Lumber Standard PS 20-70. Each piece of lumber shall be identified by the grade and treatment mark of recognized organization or independent agency certified by the American Lumber Standards Committee, Washington, DC to grade the species. All lumber specified for treatment shall be treated to the requirements of American Wood Preservers Bureau AWPB LP-22.
