A guard that is referred to as a cage or basket guard, which is an enclosure that is fastened to the side rails of a fixed ladder or to the structure to encircle the climbing space of the ladder for the safety of the person who must climb the ladder (see Figure C.1). Occupational Safety and Health Administration (OSHA), general industry regulations, 29 CFR 1910.27 (d) (1) (ii) and 29 CFR 1917118 (e) (1), state that a cage or well is required if the total length of the climb on a fixed ladder equals or exceeds 6.1 m (20 ft) and for OHSA construction regulations, 29 CFR 1926.1053 (a) (19), if the total length of ladder climb is 7.3 m (24 ft) or more. Otherwise the ladder must be equipped with ladder safety devices or self-retracting lifelines and rest platforms at intervals not to exceed 45.7 m (150 ft). A ladder with a cage or well must also be provided with multiple ladder sections, with each ladder section not to exceed 15.2 m (50 ft) in length. These ladder sections are to be offset from adjacent sections, and landing platforms must be provided at maximum intervals of 15.2 m (50 ft). See also Ladder Safety Device.