Strength when you most need it. This heavy duty type 2 jackpost features heavy duty adjustment assembly for maximum loads; modular design for greatest job site flexibility; and square post for easy and accurate cut down. Use rebar/rod through 9/16" hole for height adjustment 104" (2642mm) - 108" (2743mm). The allowable load is 28,300lbs (12,835kg) and factored resistance is 37,600lbs (17,104kg). It is tested to meet or exceed the CAN/CGSB-7.2-94 adjustable steel column standard.