from square metal rod the hanger 140 includes a clamp 141 having rectangular panels 142 144 forming a channel 145 for the upper railing bar 25 the first panel 142 and the second panel 143 can be vertically oriented and situated on opposite sides i e inner and outer relative to the deck 21 of the bar 25 the third panel 144 can extend horizontally therebetween the clamp 141 e g the panels 142 and 143 can include openings 146 for receipt of locking members the hanger 140 also includes a sleeve 147 with a conduit 148 for receipt of the pole 130 and more particularly a top region of its strut 131 if the pole 130 is made from square metal rod as illustrated the sleeve 147 and the conduit 148 can have a similar geometry openings 149 for positioning pins not shown can be provided in the sleeve 147 to adjust the vertical reach of the post 130 the sleeve 147 is fixed to the outer vertical panel 143 of the clamp 141 the upper bracket 150 is connected to an intermediate region of the pole strut 131 the bracket 150 can comprise legs 151 153 forming a cradle 154 for building supplies in the illustrated embodiment the first leg 151 is vertically oriented and connected to the pole 130 the second leg 152 extends horizontally outward from a bottom end of the first leg 151 and the third leg 153 extends vertically upward from distal end of the.