Specifications include, but are not limited to: The provision of various municipal iron, composite, plastic castings and related on an as-needed basis, for up to five (5) years. 1. Street castings: a. Shall be heavy-duty; heavy-duty is defined as a frame and cover that can withstand a large volume of vehicle traffic (H-22 loading). Sidewalk castings (H-20 loading) shall be for light traffic. b. Dimensions and treads shall be provided as shown on the attached drawings. c. Iron Frames and covers shall be constructed of gray or ductile iron conforming to ASTM A-48 and A-536. Frames and covers shall have machine bearing surfaces to prevent rocking rattling under traffic. Bolted manhole covers shall be bolted and waterproof, as shown on the standard details (drawings). 2. Composite Casting Bids: To meet the requirements of the County, a set of technical drawings and all other pertinent documentation shall be submitted by the Bidder with this portion of the bid for each size bid. 3. Castings will be purchased on an as-needed basis. Delivery of the initial order shall be made within 60 calendar days after receipt of order.