Welding thin to thick

[Haywire]

I've decided to go a different route. Not going to use those legs after all. The need to rig some cross bracing convinced me to go with pipe legs.

 

[yomax4]

Iv'e seen some nice tables where they welded threaded flanges on the table top and then used 3" threaded pipe. Add as many legs as you like.

 

[TaC team greene]

7018 is a good choice here, I'd run a J-motion, keeping the long side of the J on the 1/2 inch material, and just bounce up onto the 1/16 inch material.

I agree. Use j motion to too push the weld up to the lighter metal but hold the puddle on the thicker metal. You really need a lower support going the other way though.:thumbsup:

 

[flusher]

I've asked this question before, but can't find it now. I'm welding those sheet metal legs to the 1/2" plate. I don't want to blow through the leg material, so I thought about using 1/16 7014. Any penetration in the plate thicker than the sheet metal is a waste anyway. what do ya think? Sorry about the bad low-light cell phone pic...

Get some 3/16" or 1/4" wall square tubing and channel and fab a new pair of legs.

 

[Haywire]

Wow... 4 30 inch pieces of 3x1/4 square tube was $94. Not willing to spend that much. I'll reuse the old rusty round pipe legs.

 

[CT Jay]

Not wanting to chance having the legs fold over on me, I used 3 inch i-beam for legs when I built my table......28 inch lengths....the "i" shape made for a lot of contact length for welding them to the underside of the table.......but first I welded small 1/4" square plate on bottom of each leg, pre-drilled with holes in the plates for casters, and then bolted on 4" wheel casters. Legs are really strong.....square tube cross-bracing near bottom to add rigidity.

Top is 3/8", 36x48.....I had 1" holes drilled in each corner for hoisting, handling, etc. My welding isn't pretty for sure, but it all holds nice & tight.

Built it for welding, but have only used it as a work table so far. Wheels make it easy to roll where I need it, and the casters lock to hold table in place, although if I really needed it to stay firmly put, I'd have to anchor it better.

If nothing else, the thing will help keep the floor from blowing away on a windy day......it's heavy, for its size.

 

[Haywire]

You must have either some good scrounging skills or a thick wallet... LOL

 

[Johnp33]

I worked at Freightliner and a cement truck came in needing the plates above the suspension replaced, they were about 5 ft x 2.5 ft X 3/4 thick. I welded them together and made a great bench.
I would spend the money on the strongest legs you can afford, you do not want to be welding, or banging on the bench with tin legs and it folds and hurts you.
Mine has 4 legs, of 2.5 X 1/4 square tubing with 4 pieces of 1/4 X 2 angle iron about a ft off the floor I put bases on the legs with 4 inch channel iron and 2X4 to the floor. Wood to the floor cuts away down on noise, and damage to the floor.