space between vertical plates 74 and 76 as shown by arrow c in fig2 b about a fulcrum 98 which includes a sleeve and a roller the end of the arm 82 is connected to a pivot 91 to which a rod 92 extending through a tubular member 94 is connected the upper end of rod 92 abuts against the underside of shackle 70 shackle 70 has on the inner surface thereof the square rod 71 which bites into the rubberized surface 11a of pole 11 to hold the pole in the elevated condition a roller rod 97 on the backside of the pole is also supported by the shackle 70 only one holder 72 with lever 82 and rod 92 is shown in fig2 for the sake of clarity it is of course understandable that a second stabilizing arrangement can be provided for the second pole 12 in order to stabilize the scaffold support after it has been moved on wheels 24 to a desired position an operator presses downwardly on the extended end 84 of lever 82 to insert it into holder 72 the arm 82 pivots about the fulcrum 98 so that the distal end of arm 82 is pivoted upwardly and causes the rod 92 to move upwardly against the underside of shackle 70 which causes the shackle 70 to angulate into the position shown in.