Mid Rail Requirements
Mid rails, screens, mesh, intermediate vertical members or equivalent intermediate structural members must be provided between the top rail and stairway steps to the stair rail system. When mid rails are used, they must be located midway between the top of the stair rail system and the stairway steps.
In addition:
- Stairrail systems and handrails must be surfaced to prevent injuries such as punctures or lacerations and to keep clothing from snagging.
- The ends of stair rail systems and handrails must be built to prevent dangerous projections, such as rails protruding beyond the end posts of the system.
- Intermediate vertical members, such as balusters used as guardrails, must not be more than 19 inches (48 cm) apart.
- Other structural members, when used, must be installed such that there are no openings in the stair rail system that are more than 19 inches (48 cm) wide.
Stairs and 3-Point Control
Applying three-point control to stairs requires two continuous handrails to allow a constant grip while moving up and down the stairway. Arms and hands should be free of materials, enabling them to support the full body weight if necessary. Stairs, such as those found on ships, can be very steep and present a serious fall hazard.
Knowledge Check Choose the best answer for the question.
3-5. Why are two hand rails required on stair systems such as those on ships?
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