WELDING FOR JOISTS AND FINISHING OF MACHINING RAILS
Unless otherwise authorized by the engineer, any welding to the top flange of steel members for supporting floor form joists and finishing machine rails will not be permitted. Welding of hangers and supports to shear studs will be permitted as follows: The welder must be certified and use low hydrogen electrodes and proper No welding shall be permitted when the ambient temperature of the air is below 32° F (0°C) or when the lowest temperature during the preceding 12 hours has been below 0° F (-18°C). Windbreaks or shields shall be provided when the wind chill factor is strong or cold enough to prevent welding from being carried out in a normal manner without such Welding shall not be permitted on surfaces that are wet or exposed to Arc strikes on bridge flanges must be prevented at all times. 1. Welding of Railroad Bridge Deck Floors: Railroad bridges that span highways are designed with a steel deck that covers the bridge and are welded together in t...