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The weld access hole or rat hole is a structural engineering technique in which a part of the web of an I-beam or T-beam is cut out at the end or ends of the beam. The hole in the web allows a welder to weld the flange to another part of the structure with a continuous weld the full width on both top and bottom sides of the flange.
Plug weld; Flare groove weld; Weld access hole; Welding joint - a joining process that produces a coalescence of metals (or non metals) by heating them to the welding temperature, with or without the application of pressure, or by pressure alone, and with or without the use of filler metals
Welding is the joining together of materials ... Weld access hole; Weld pool; Weld purging; Weld quality assurance; Weld tests for friction welding; Weldability ...
Plate girder, formed by welding (or occasionally bolting or riveting) plates. I-beams are commonly made of structural steel but may also be formed from aluminium or other materials. A common type of I-beam is the rolled steel joist (RSJ), sometimes incorrectly rendered as reinforced steel joist.
Weld access holes have more stringent building code requirements than weld termination holes, and it was not clear which type of holes were added. In February 2019, the TJPA announced that it expected repairs to be completed in June 2019, but cautioned that the center would not reopen until the MTC peer review panel published its final report.
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