Cuplock Stair System

Cuplock Stair System 
Universal's Cuplock Stair System is a heavy duty all-aluminum stair stringer that fits a 3'6" or 4' wide x 8' long bay. The aluminum stringer is a lighter stringer with heavier load capacity and allows for easy installation by placing each stringer on either side of the bay over the top of the cuplock horizontals. Then by installing the stair treads going up the stair system creates an easy and effective method of access.