PC-1309-1310 - Playground Printed Welcome Sign The Welcome Sign Frames shall be made from high density 3/4" sheet plastic specially formulated for optimum UV stability and color retention. The Welcome Sign Frame Posts shall be fabricated using 1.660" O.D. 11 gauge steel tubing with welded 3/16" thick steel mounting flange and will be Powder Coated as specified. The Transfer Leg Top shall be precision die-cast from a high-strength aluminum alloy and will be Powder Coated as specified.