ASME A112.6.3 pdf download

ASME A112.6.3 pdf download FLOOR AND TRENCH DRAINS
4.2 Open Area Requirements for Various Classifications of Drains Opening area requirements for drains shall be as shown in Table 4.
4.3 Openings in Top Grates Openings shall be any geometric shape. Openings shall be sized to exclude debris and accommodate the anticipated traffic. When drainage requirements dictate openings that would permit entrance of debris, a sedi- ment bucket shall be installed in the drain body sump to intercept this debris.
5 TOP LOADING — CLASSIFICATION
5.1 Loading Classifications Grates and top rims shall be designed to meet the following loading classifications:
5.1.1 Light Duty. Grates having safe live load (as calculated in para. 5.2.5) under 2,000 lb (900 kg).
5.1.2 Medium Duty. Grates having safe live load (as calculated in para. 5.2.5) between 2,000 lb (900 kg) and 4,999 lb (2 250 kg).
5.1.3 Heavy Duty. Grates having safe live load (as calculated in para. 5.2.5) between 5,000 lb (2 250 kg) and 7,499 lb (3 375 kg). 5.1.4 Extra Heavy Duty. Grates having safe live load (as calculated in para. 5.2.5) between 7,500 lb (3 375 kg) and 10,000 lb (4 500 kg).
5.1.5 Special Duty. Grates having safe live load (as calculated in para. 5.2.5) over 10,000 lb (4 500 kg) shall be considered special duty.
5.2 Test Procedure for Grate Loading Safe live load requirements, as listed in para. 5.1 shall be determined as follows:
5.2.1 Load Classifications. Load classifications as stated in para. 5.1 shall be determined by labora- tory tests.
5.2.2 Platen Size. A 3.5 in. (89 mm) diameter platen shall be applied to the center of the grate specimen.
5.2.3 Loading. Loading shall be applied slowly so that point of failure can be observed.
5.2.4 Point of Failure
(a) Brittle Materials (Cast Iron). The point of failure of brittle materials shall be the load (in pounds or kilograms) at which the first fracture on any part of the specimen appears.
(b) Ductile Material. The point of failure of ductile materials shall be the load at which the permanent set (at the point of loading) is greater than 2% of the longest transverse dimension of the specimen.
5.2.5 Safe Live Load. The maximum safe live load shall be computed by dividing the load at failure by two.
6 MATERIALS AND FINISHES
6.1 Materials The items covered in this Standard shall be of the material specified and shall meet all applicable requirements and standards given herein. The castings for these drains shall be sound, free of blow holes, cold shuts, and other imperfections, and shall be of uniform wall thickness and true to pattern. They shall also be clean and free of fins. It shall not be the intent of this Standard to limit acceptable materials to those included in this section. The use of other materials