How to fix this crack

[ArlyA]

plug weld

In reference to the auto frame repaired with a fishplate, I note that a long rectangular plate is welded to the top of the frame by welding through holes drilled in the plate. What's that type of weld called (when you fill up a hole to connect plate to base rather than weld edges)?

 

[dickfoster]

I'm at a real disadvantage trying to help in these situation. The majority of my welding was done off engineered blueprints. Not really up for discussion with blueprints. You either do as the print says, or the company will find someone else to do it.

Yeah as in per MIL-TFP-FAC.

 

[jack707]

I cut a 250 gallon diesel tank to make into a pig roster I was going to hook a hose up to the tank but that was not wide enough so I filled the tank with H2O a cut it with no problem!

 

[jack707]

In reference to the auto frame repaired with a fishplate, I note that a long rectangular plate is welded to the top of the frame by welding through holes drilled in the plate. What's that type of weld called (when you fill up a hole to connect plate to base rather than weld edges)?

Plug welding

 

[IslandTractor]

Plug welding, that's it. Thanks ArlyA and Jack.

 

[Egon]

Got curious about the terminology! So went looking. Seems flitch plates may be used for joining or strengthening but bolts are used for the connections rather than welding.

 

[Mark @ Everlast]

It's fish plates guys. But it may be a regional thing to call them by an inappropriate term, as I've heard them called a lot worse.

But, you don't need any center holes in something like this, if you will weld it from underneath. This is designed t help strengthen the corners, and resist flexing while spreading out the load. If you can't weld from underneath, the a few 1/2"-5/8" holes drilled through the plate that line up with the inside edge of the frame will be perfect for plug welding with a 3/32 7018. I'm no engineer either, but from experience with this sort of thing, you want the legs of your triangle plate to be 3 times the width of the beam.

 

[prichard]

Looks to me like a flitch plate is a contrusion term for something used to extend a beam or a header.

 

[Shield Arc]

I'm no engineer either, but from experience with this sort of thing, you want the legs of your triangle plate to be 3 times the width of the beam.

Good to know! Thanks Mark.:thumbsup::thumbsup: I always depended on an engineer to tell me these kind of things.

 

[Mark @ Everlast]

I wish I was out there. Those are the kind of repairs I enjoy.