![]() Linclon really had to back pedal to save millions. Its hard to believe that they could get away with welding all that and the wire was still such a "poor" choice for this applicaion. The article also had a large portion about the fact that Lincolns wire the E70t-4 had a high aluminum content in it and that led to the welds themselves not being elastic enough. Clean off! As if there was no prep to on plate and it never made fusion past the mill scale. ![]() On some of the photos which I found disturbing was the weld broke clean off the tall standing plate where fillert welds were required. In some cases it said that nearly every weld joint in the building broke and the building was still standing. It crazy to see the photos of the welded joints and the cracking and twisting. 02$ I was doing a lot of reading on the Northridge earthquake and what happened to all the buildings. Maybe Al can chime in too at one point with his. ![]() Have I headed in the direction you intended? Have a Great Day, Brent Higher quality cut surfaces than D1.1 and checks with MT. Staggering the overlap of the weld passes at the web so as to reduce the stress riser and the potential for trapped slag and other weld discontinuities. Then, there are simple things like using welds in the flat position instead of doing the bottom flange in the overhead. The Sideplate system utilizes a configuration with many fillet welds and fewer CJP's. Some items that impress me are the new style configurations being engineered for flexibility without failure, such as changes to moment connections with joints such as Sideplate designs as well as several others. Pre-heat: Max inter-pass temp, re-entrant corners, Weld Access hole geometry, joint configurations, welding processes that qualify as Pre-Approved, welder testing for qualification to D1.8 Demand Critical welds on CJP's with WAH, max wind velocity lower than standard D1.1, and much more. And the work done to bring along D1.8 shows the depths that research went into in order to make a more structurally sound framework. A comparison of D1.1 from the early 80's with the current 2010 will show many revisions. ![]() Leaves us to do a bit of speculating? Many things have been improved (?) since some of the quakes and other events, mainly in CA, in the 80's. The ability to weld out of position at the higher current levels will depend on plate thickness and welder skill.Jordan, Pretty limited information for this inquiry. *These parameters may be used in all positions. Recommended Welding Parameters (DCEN): Diameter Exhibits a smooth globular transfer, minimal spatter and easily removed slag.Fast freezing slag facilitates excellent weldability in all positions.Operates on straight polarity (DCEN) with no external shielding gas.AWS D1.8 Seismic, CWB E491T-8-H8, ABS 3YSA, DNV IIIYMS.E71T-8-H8 is designed for structural applications such as bridge fabrication, ship and barge construction, as well as other general fabrication. It has a smooth globular transfer, excellent bead shape and easily removed slag. A fast freezing slag facilitates welding in all positions. It is intended for the welding without a shielding gas of carbon and certain low alloy steels where excellent low temperature toughness is required. E71T-8-H8 is a self-shielded, carbon steel, flux cored electrode.
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