Adir Corp. Expandable Mobile Plan Center for Blueprints - Sand Beige EXPANDABLE MOBILE PLAN CENTER. Measuring 51" H x 47" L x 20.5" D, this sand beige mobile rack is length adjustable from 29 to 47 inches to effectively store your larger files with ease. BUILT TO LAST. Composed of heavy gauge steel with a powder-coated finish to provide long-lasting strength and use throughout the years, this mobile stand boasts a 360-pound weight capacity and can hold up to 1800 documents at once! CONVENIENT DESIGN. Accommodating up to 18 clamps at the same time, just clamp your files into the paper clamps and drop them into the top bracket for quick access to your hanging blueprints. Please note: Only one size of hanging clamps can be placed into this mobile blueprint stand at a time. EASY TO TRANSPORT. Four, ball-bearing swivel casters on the bottom facilitate easy movement from one location to the next. The front two casters lock to keep the unit securely in place when you get to your destination. VARIETY OF CLAMP SIZES. This cart is available with or without clamps. The right hanging clamps are key to a filing systems effectiveness, which is why these strong aluminum clamps with solid steel, silver wing knobs are both visually pleasing and soundly durable. This unit is offered with your choice of 24-, 30-, 36- and 42-inch size clamps to accommodate your needs.