HORIZONTAL BEAMS ARE ROLL-FORMED TO A Z-PROFILE FOR ADDED SHELF CAPACITY. DECKING SITS FLUSH TO BEAMS FOR NEATER APPEARANCE AND STABILITY. 2-1/4"" X 1-1/2"" X 14-GAUGE UPRIGHTS. BOLTLESS INTERLOCKING BEAMS WITH DOUBLE TEARDROP POSTHOLES ASSEMBLE QUICKLY AND WITHOUT TOOLS. LEVELS ADJUST AT 1-1/2"" INCREMENTS. INCLUDES RUST GALVANIZED STEEL DECKING FOR LONG LIFE AND A SMOOTH STRONG SURFACE. BEAMS AND UPRIGHT HAVE A GRAY BAKED ENAMEL FINISH. THIS ADD-ON UNIT INCLUDES 2 T-POSTS 12 HORIZONTAL BEAMS AND DECKING.