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Hi Unclesyd, Nice primer on flux paste! So many questions. I haven't seen it used, yet. How fun for you to see the weldments in use. I was in fabrication. Everything was bright and pickled when it left the shops. I can really see the value of using flux paste on large diameter piping. Why do...

Hi Unclesyd, You know, I have read about fluxed GTAW wire. I think it was in Welding Design & Fab. The welds look great. And I believe the flux protects the root side just fine. The flux doesn't care which side of the weld it covers. It just floats to the surface, inside or out. It works for...

Hi Novot, My wife just smacked me for being such a wise guy. I'm sorry if I was offensive with my smart-ass answer. The data is good, the delivery stunk. That is the problem with the submit key. Sometimes it goes to quickly. I hope you take it in good spirit and I will try to be more...

Hi You, Boy, this thread has been hanging around for a while. I guess the others were hoping you would buy D1.6 to answer these questions. It's really a good idea. I'll pitch in a little. Sure, you can weld without a backup bar, but you have to backgouge the root to get complete pen or...

Hi Folks, A circumference? Like a pipe? That's an old, trick weld symbol question AWS throws out. You stop where you start, so you are always on the arrow side of the joint. Detail it just like a stitch weld on one side of a cover-plate, for example, and a full, sealing fillet on the other. You...

I guess it looks good, too, if you are on the bottom side of the equator! Koz

Hi Rich2001, Thanks for the info on the Thermit(e) weld. I had to write a repair procedure for a local group installing light track rails for this process. It appeared to be very user-friendly and they sure welded a large joint fast. The integrity (most of the time, as evidenced by my repair...

Hi SweetNlow, I hit the submit button to fast, again. The A992 truss chord will form a martensitic grain structure with a rapid quench, too. It is a little different from the martensite of the reinforcing steel because it has less carbon. It is an academic difference. And the A706 up to #6...

Hi SweetNlo Thanks for catching my brain freeze on the wire. I did a "Doh" with appropriate slap on the head as soon as I hit the submit button. I applaud Alfred E. Neuman because it is a "What Me Worry" kind of world. The marriage of steel and concrete is a good one. The...

Hi QAScott, Can you give us an ASTM spec on the 9% Cr so we can see what else is in there? Koz

Hi Guys, I think CWIC's point is that unless you calibrate your equipment, you don't know what you have as far as "torque" values go. The numbers are meaningless unless you bounce the equipment, torque-limiters, et.al. against a known standard such as the pressure gauge on the...

Hi structural1 What thicknesses are you joining and what is the the end configuration, flat, round? And what kind of stainless? Are you trying to maintain a mill-produced brush finish or can you control this? Is this for strength or architectural finish? There are plenty of ideas. Koz

Hi Womprat, I believe these connectors have been tested and are very effective time savers. They are good things. And I think that the reason designers are using these mechanical connectors is because they can presumably be installed by untrained anybodies. It costs approx $50/hr, fully...

Hi Folks, I looked at mechanical connectors for rebar today. I talked with a field erector, too. We do a lot of seismic construction out here. I looked at a connection this erector has for a new building for a local University. This school is about 1/4 mile from a fault that is considered...

Hi folks, Thank you for presenting the biggest difficulty in welding reinforcing steel, the cost! I've often wondered about this. With the exception of A706, the other bars generally require some kind of preheat, considering diameter and carbon equivalent. Preheat equipment can cost less than...

Hi Ron Not a metallurgical connection. Mechanical, yes. And it isn't a special process because we can count the wraps of tie wire, measure the gauge of the the tie wire, and calculate the actual strength of the connection without having to destroy the connection. Why concrete guys choose tie...

Hi all, Glad to see you in the pool. Special processes include all operations where the quality of the product cannot be verified without destroying the product during evaluation. Special processes include welding, nondestructive testing, heat-treating, and plating. As such, these processes...

Thanks Bbird, I'm a passive observer on this experiment and the resulting patent (I wish I was part of that team!). Thanks for filling in my gaps on the steel to concrete and development length thing. I've lost track of the experiment, but it is very likely they designed an unbalanced condition...

Hi all, So I was wondering, how do we assure the quality of a special process when no on is looking? It's like the question, if a tree falls in the forest does it still make a sound if there is no one there to listen? We've been having an on-going discussion concerning welding on a concrete...

Hi All, Thank you for taking the time to clarify your responses. In light of that respect I will try to keep this one short, rather than get on the soap box,again. I asked Bbird about the reinforcing steel cracking out its developed length during a seismic event for a moment frame. I've gotten...