29 CFR 1918.25: Bridge plates and ramps (See also § 1918.86).

(a) Bridge and car plates (dockboards). Bridge and car plates used afloat shall be well maintained and shall:

(1) Be strong enough to support the loads imposed on them;

(2) Be secured or equipped with devices to prevent their dislodgement;

(3) Be equipped with hand holds or other effective means to permit safe handling; and

(4) Be designed, constructed, and maintained to prevent vehicles from running off the edge. 3

(b) Portable ramps. Portable ramps used afloat shall be well maintained and shall:

(1) Be strong enough to support the loads imposed on them;

(2) Be equipped with a railing meeting the requirements of § 1918.21(b), if the slope is more than 20 degrees to the horizontal or if employees could fall more than four feet (1.22 m);

(3) Be equipped with a slip resistant surface;

(4) Be properly secured; and

(5) Be designed, constructed, and maintained to prevent vehicles from running off the edge. 4