For starters, understand that the lifting platform is supposed to provide a solid, secure area for lifting - it is supposed to be capable of taking the pounding of heavy weights being dropped from arms' length overhead, day after day, and it needs to provide a sure-footed area for doing your lifts.
Class K welding cable is the most commonly used. Your standard welding cable is 30 AWG stranded and is available in a red or black jacket. Class K cable is commonly used for stationary welding jobs. Item (sold by the foot) O.D.
The weld is also used when welding a rod inside of a pipe. When the fit is such that the rod or bolt stud fits snugly inside of a hollow tube, a hole is drilled into the tube and a plug weld is used to secure the rod inside of it. Occasionally, this method is also used when welding thin exhaust pipes onto a vehicle.