I forgot the link, in case someone wants to put together a set of the trammels.

Here you go, have fun...

JoeJ

Here is a link that might be useful: Trammel Drawing

Thanks JoeJ, I think that I could use some of those half clamps, may try to make some, magnetic welders blocks come in handy at times too.
When you say a light tack, are you talking about just holding something long enough to tack it lightly, or are you talking about lightly tacking the clamp onto something ? Probably sounds like dumb question to you, since you already know what you mean, but it is not clear to me. Do you have a couple of pictures to demonstrate what you are talking about?
Something that I observed at a welding shop, where they are pretty danged good, while waiting to talk to one of the owners was:
One man had a triangle piece of about quarter inch plate or thicker, about two and a half feet long on the base side, that he was going to weld onto a retangular piece laying flat on the workbench. He sat it in place on the flat piece standing up at a right angle, lined it up where he wanted it, grabbed a mig welder and tacked it on each end just enough to hold it upright, got a square, and bent it over a little to a correct right angle then finished his weld with an arc welder. I was impressed, thought that it beat the heck out of the way I would have tried to do it by aligning to 90* and blocking and proping etc.
Bill P.

JoeJ:

Rod couplings are what you are thinking of. The way you show them with a bolt in one end, makes for a good setter for Hilti stud anchors in Unistrut or other recessed channels and such. I usually lock the bolt in place with a nut before I use them for this purpose. They work real well for the 1/4 inch anchors especially, since it reduces the chance of hitting the anchor with a glancing blow and bending it over before you get it driven down to depth.

GG

Thanks GG,
Never used them for that. But I sure like the Hilti studs!!

GoneFishing,
A tack in the middle of the plate on the bottom of the clamp. If a good tack, you won't break it off with the vise grip clamps.

And don't ruin good clamps to make them!!! hehehehe, in time you will ruin a few anyway.

I used to tack 4 sides of stainless tanks together before squaring it up. As long as the pieces were sheared right it never was a problem.

Joe