EXTRUDED FABRICATED ALUMINUM MATERIAL; 21-3/4 INCH BASE WIDTH; 6 FT HEIGHT TO TOP STEP; 6 HEIGHT TO TOP STEP IN FT; 225 LOAD RATING IN LB; 225 LB LOAD RATING; 41-3/4 INCH BASE SPREAD; APPLICABLE STANDARD ANSI A14.2, OSHA, UL; RATING TYPE II MEDIUM DUTY