Specifications include, but are not limited to: 1. Gray iron castings shall conform to and be tested in accordance with the Standard Specifications for Gray Iron Castings ASTM A48 and applicable sections of Drainage Structure Castings, ASSHTO M 306, current addition. All castings, including manhole steps, lamphole covers, water meter lids, manhole frames and lids, adjustment rings and valve boxes shall be Class 35B iron. 2. Iron class shall be determined using only those guidelines outlined in ASTM A48 Tensile specimens shall be obtained using AASHTO M306 Para 9.1.4, Acceptance on the Basis of Test Bars Cut from Portions of Units Supplied to Purchaser. Where samples are too thin and cannot be obtained under ASTM M306 Para 9.1.4, specimens shall be obtained under ASTM M306 Para 9.1.3 Acceptance on the Basis of Cast-on Test Bars. Elapsed time during tensile test shall follow ASTM A48 papa 14. Tensile test specimens shall fit the holders of the testing machine in a way such that the load will be axial. 3. Additionally, castings that are rated for traffic loadings within dedicated public rights-of way or other locations subject to vehicular traffic must pass as AASHTO proof load test that can maintain a 40,000 lb proof load for one (1) minute, applied on a 9”x9” contact area in the center of the casting. The load shall be applied at a constant rate requiring a minimum of 30 seconds to reach the 40,000 lb level. Following this test, the casting shall be visually inspected for cracks or permanent deformation which will be cause for rejection. Following this, the casting shall be loaded to failure.