Our level jack is a strong steel 24" strung bar welded to base plate at a correct point. Takes into consideration singular change of every leg in a stationary situation on moderately level surfaces. This is what makes our platform level jacks the best: Strong steel bar, not empty. Wing-nut is a gigantic 9.5" long, this gives expanded influence and simplicity of change under burden. Exact square summit strings take into consideration expanded simplicity of alteration under burden. Cold-plunge zinc stirred for expanded climate obstruction.
In the event that you have to deal with unleveled ground or an unleveled housetop consider Scaffoldmart's swivel jacks. They are convenient for working around a fireplace on the rooftop. They are 24 crawls in all out length. The real change go is 18 crawls of upward modification.