1592953477000 1312632483000 term-53266 1616541029139 1312632547000 1616289979612 adlib fitz-online adlib-term-53266 1d1df6b0-ac82-3090-a042-4f28c1b0c65b 2 1 scope note Stair units that consist of one tread and one riser, or any similar element providing a horizontal surface on which to support the foot of a person descending or ascending. reference term-44695 adlib-term-44695 50962979-9090-34aa-bad8-c9489eaeee71 step V.PJ.AFU.ALO.ARI.BIQ.AXC.ALO.BIQ.AFU 1 code V.PJ.AFU.ALO.ARI.BIQ.AXC.ALO.BIQ.AFU 1 steps reference term-47645 adlib-term-47645 5cab847f-89d0-36ba-a6c4-ec2f9ed93e83 <steps and step components> steps term