Portable Stages and Risers. STEELDECK Platforms Come in Standard 4x8, 4x6, 4x4, 2x4 and 2x8 Sizes. Platforms Can be Used to a Height of 4 feet Without Cross-Bracing; 6-Leg Platforms Support 125 lbs/sq.ft. and Weighs 150 lbs. Rentals and Installations.