Specifications include, but are not limited to: A. Floating Dock Design Criteria 1. Design to resist a 400 pound concentrated vertical load at any point, and maintain a maximum cross slope of 2 percent from horizontal. 2. Wind Load: Uniform horizontal load from any direction equal to 25 psf. 3. Floatation/Freeboard: a. Dead Load: 15 inches plus or minus 1 inch freeboard. 1) Provide level float under dead load condition. 2) Including the weight of the gangways on the most landward floating dock unit, as applicable. b. Uniform Live Load (30 psf): 8 inches freeboard minimum. 4. Storm Conditions: Withstand storm conditions of up to 1.5 foot waves on a periodic but not continual basis. B. System Design floatation unit connections to provide a rigid system, which will prevent units from racking or twisting in torsion, and deflecting without adjacent units deflecting. C. Floatation Units Design to maintain required buoyancy and freeboard even if structurally damaged. D. Gangway Design Criteria 1. Vertical Load a. The deck and structural components shall be designed to support the dead load of the gangway plus a distributed live load of 50 pounds per square foot of deck area. 2. General Construction a. Weldings: All welded components shall be fabricated and reinforced, as necessary to achieve design standards. b. All pipes or tubes shall be capped. c. All metal pieces shall be supplied full length. Splices are not acceptable. d. All posts shall be reinforced with gusset plates if welded connections are required. 3. Safety Rail a. Safety rails shall be designed and constructed for a concentrated load of 200 pounds applied at any point and in any direction along the top railing member. b. The safety rail shall also be designed and constructed for a uniform load of 50 pounds per foot applied horizontally at the required safety rail height and a simultaneous uniform load of 100 pounds per foot applied vertically downward at the top of the safety rail. c. The loading conditions shall not be applied simultaneously. 4. Handrail a. Handrails shall be designed and constructed for a concentrated load of 200 pounds applied at any point and in any direction; b. Handrails shall be designed and constructed for a uniform load of 50 pounds per foot applied in any direction; c. The concentrated and uniform loading conditions shall not be applied simultaneously. 5. Allowable Deflection a. Deflection shall be a maximum of L/180 where Lā
is the length of the gangway.
