What 29 CFR 1910.26 requires (plain English)
29 CFR 1910.26 sets the requirements for dockboards: the portable or fixed plates (also called bridge plates or dock plates) that bridge the gap between a loading dock and a truck, trailer, or railcar so that powered industrial trucks and material can cross. It is part of Subpart D (Walking-Working Surfaces).
The standard requires that each dockboard used meet its requirements: dockboards must be strong enough to carry the loads imposed on them, and must be secured in position, either by anchoring or by equipping them with devices that keep them from moving out of their proper position, because a board that slides when a forklift crosses can drop the truck into the gap. It also requires measures to prevent transfer vehicles from running off the edge of the dockboard, and addresses the handholds or other means for safely positioning portable dockboards.
1910.26 works with the powered-industrial-truck standard (1910.178) and safe dock practices: the vehicle at the dock must also be secured against unexpected movement (wheel chocks or restraints) and the dock and approach kept in safe condition. Dockboards were reorganized into 1910.26 in OSHA's 2016 Walking-Working Surfaces rule; the core requirements (capacity, security against movement, and run-off protection) target the gap-fall and forklift-drop hazards of loading-dock work.