08-10-1992 Council Packet - Laserfiche WebLink

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ll- F''K I F- ‘P? S;»>n: fI- r t'r. v^- -It*r.r^. I>; ■^^:- ::Vrn'i- p5;S- liPiSv ’ 'U&MSr 3.1.3.7 3.1.4 3.1.5 3.1.6 ^A?y-v- pr’r - . '.V.- in such a way that rails (wear resistant surfaced members) under the bridge will slide freely on the angle if the bridge goes above the level of the upper connection and rides on the end of the pier. The rails shall be of adequate length to ride on the end of the pier "angle" at high water due to movement of the anchorage system. Handrails: Handrails shall be required on both sides of all bridges and may be part of the structural support or separate units. Top rail to be 42 inches above the deck surface with intermediate railings so spaced so as to allow no more than 10 inches between adjacent rail* ings. All rails shall be smooth with*no sharp corners, burrs, etc., so as to make a smooth member for hand contact. Handrail and handrail brackets shall be designed to withstand a minimum concentrated load of 200 pounds applied from any direction at any point on the handrail. Fittings shall be galvanized. Sharp corners on galvanized steel handrails or trusses used as handrails shall be avoided by the use of short 45 degree miters, short curved sections, or other approved methods. Protrusions on the railing or on the bridges themselves shall not have sharp corners. Skirtino! Skirting is not required except if so noted on the con struction drawings. If required, exposed structural framework and flotation devices shall be skirted from decking to 2" or less above the waterline with nominal 2" thick wood meeting the lumber require ments as specified under Section 2.1.1. The skirting must be ade quately secured to the frame with bolts or other acceptable fasteners as dictated by sound engineering practices. Knee Braces and Fillets: All finger piers shall have knee braces that extend at least 4 feet along the finger piers and main pier. Larger braces may be used if required to gain the necessary strength for the loads applied but in no case shall the braces extend more than 6 feet along the finger piers and main pier. The knee brace Isosceles triangle area shall be covered with the same deck material used for other decking. The edge of each fillet shall extend slightly beyond the knee brace and the edge of the fillet shall have a rub rail to protect a boat from impacting upon bare steel. Fenderino: All fenders shall be of 6" x 6" nominal timber of the same type wood and treatment as wood decking. Fenders shall be located as shown on the drawings designated FP-1 and FP-2 appended to this section and/or the contract drawings. The length shall allow adequate fastening to the pier(s) and will insure the heights above the pier deck(s) specified in Article 1.3.7. All fenders shall be securely attached to the framework with a minimum of two bolts and the framework must be structurally adequate to accept without distortion design impact loadings applied to the fenders. Lag bolting of fenders to the timber side walls of wood type floating piers shall not be permitted along the "open" water side of service and tee piers or along those main piers where fendering is indicated on the drawings. All bolts, nuts and washers shall be galvanized with all bolt heads counterbored. Tops of fenders shall be "roofed" in a manner satisfac tory to the Engineer. 16 -