TJ40 spin top jack, spin top trailer stabilizing jacks ...
TJ series Spin Top Jack says a "must" for safety loading and unloading trailers. Meet OSHA Specification with our wide variety for trailer stabilizing jacks OSHA 1910.178(k)(3) states "Fixed jacks may be necessary to support a semi-trailer and prevent upending during loading and unloading when the trailer is not coupled to a tractor". TJ40 series is spin-top jacks, TJ50 series is trailer ...