formed with a front face 106 that intercepts an upwardly inclined top surface 107 the front face and the top surface forming an acute angle preferably the cushion pad is formed from a tough synthetic resinous material such as polyurethane in like manner a resilient cusion pad 108 is fixed on the free end 97 of the bar and is provided with a front face 109 intercepting an upwardly angled top surface 112 in an acute angle it should be noted that in the retracted position of the arms 92 and 93 as shown in full lines in fig8 and 9 the cushion pad 108 projects forwardly beyond the faces 106 of the pads 103 and 104 however when the arms 92 and 93 are extended as shown in broken lines in fig8 and 9 this relationship is reversed and the pads 103 and 104 project beyond the pad 108 as shown to further cushion the 34 foot 34 so as to safely support one or a multiplicity of panes of glass the top surface 113 of the bar fig9 is equipped with a flat rectangular cushion 114 vulcanized to mounting plate 116 which is in turn detachably secured to the top surface 113 of the bar by appropriate mounting screws 117 note that the forward end of the rectangular cushion 114 is notched at its corners 118 to accommodate the retracted condition of the arms 92 and 93 and abuts the back surface of the cushion pad 108 it will thus be seen that the top and front surfaces of each 34 foot 34 are provided with cushions on all surfaces apt to come into physical contact with.