Ramp and Stair Units Popular Models - Pre-Fabricated Dumpster Access Stair and Ramp Units Dumpster Access products are fully customizable to your unique needs. Stair Units: Mobile and Fixed Dumpster Access 3-TreadModel No. DSW-3 shown STAIRS Ramp Units Dumpster Access 10′ RampModel No. DR-10 shown RAMPS Gallery of Standard and Customized Dumpster Access Solutions