Welding T and Lap Joints
by Spencer Blotsky in Workshop > Metalworking
275 Views, 1 Favorites, 0 Comments
Welding T and Lap Joints
![illustration-mig-welder-worker-working-using-arc-welding-torch-viewed-side-holding-his-visor-set-inside-circle-187294895.jpg](/proxy/?url=https://content.instructables.com/FY9/NK1C/L1KQ56YO/FY9NK1CL1KQ56YO.jpg&filename=illustration-mig-welder-worker-working-using-arc-welding-torch-viewed-side-holding-his-visor-set-inside-circle-187294895.jpg)
Hello, my name is Spencer Blotsky in fact I am currently a student at Lake Area Technical College in the welding program. Today I am going to show y’all how to weld a T and Lap join. These joints are one of the most seen joints out in the world/work force. For example, welding on a cab you will run into T joints and Lap joints. I am going to show you how to weld these joints in six easy steps. For the last 3 years I have been welding and learning all about it.
Supplies
Y'all will need a welder with gas, welding helmet, welding jacket, welding gloves and steel.
![FD1196DB-4AAC-4165-8630-4F640DD0E9D0.jpeg](/proxy/?url=https://content.instructables.com/FE9/UIL5/L1KQ4NOQ/FE9UIL5L1KQ4NOQ.jpg&filename=FD1196DB-4AAC-4165-8630-4F640DD0E9D0.jpeg)
![IMG_2383.jpg](/proxy/?url=https://content.instructables.com/FJ5/N7EQ/L1KQ4NOR/FJ5N7EQL1KQ4NOR.jpg&filename=IMG_2383.jpg)
First, turn on the welder and make sure it is on the right settings(270 wire speed and 17.5 amps). Also make sure you have a welding helmet and a welding jacket on.
![Spencerv2](/proxy/?url=https://content.instructables.com/FXC/VD1R/L1KQ4P24/FXCVD1RL1KQ4P24.jpg&filename=Spencerv2)
Second, put on of the welding tip and nozzle and make sure the shock ring is on, so you don't get shocked.
![April 4, 2022](/proxy/?url=https://content.instructables.com/F3Q/DMCA/L1KQ4PIQ/F3QDMCAL1KQ4PIQ.jpg&filename=April 4, 2022)
Third, turn on the gas make sure you are getting about 30psi; you don't want more then that because it could cause porosity and if you use less then that it will not fuse right.
![index.jpg](/proxy/?url=https://content.instructables.com/FCG/0BF6/L1KQ4QOV/FCG0BF6L1KQ4QOV.jpg&filename=index.jpg)
![index2.jpg](/proxy/?url=https://content.instructables.com/FGN/PWZB/L1KQ4QOW/FGNPWZBL1KQ4QOW.jpg&filename=index2.jpg)
Fourth, get four pieces of 11-12 gauge steel which is about 2.78-3.05mm thick.
![Spencer v3 welding](/proxy/?url=https://content.instructables.com/FFY/CNLM/L1KQ4Q77/FFYCNLML1KQ4Q77.jpg&filename=Spencer v3 welding)
Fifth, tack up a T and Lap joint, the T joint should look like the letter T when tacked up and the lap joint is one piece of steel on top the other piece over lapping about halfway.
![Spencer welding](/proxy/?url=https://content.instructables.com/FSC/H5DZ/L1KQ4QJP/FSCH5DZL1KQ4QJP.jpg&filename=Spencer welding)
Sixth, weld them up, when welding these up you want about 1/8 to 1/4 of an inch of wire sticking out. Then you stick that little piece of wire into the corner of the joint and pull the trigger.