EXTRUDED FABRICATED ALUMINUM MATERIAL; 24-1/2 INCH BASE WIDTH; 6 FT HEIGHT TO TOP STEP; 6 HEIGHT TO TOP STEP IN FT; 300 LOAD RATING IN LB; 300 LB LOAD RATING; 42-3/4 INCH BASE SPREAD; APPLICABLE STANDARD ANSI A14.2, OSHA, UL