BS EN 790:1995 Inland navigation vessels. Stairs with inclination angles of 45° to 60°. Requirements, types
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This standard applies to stairs with inclination angles of 45° to 60° used in working areas of inland navigation vessels.
It does not apply to stairs accessible to passengers.
For stairs in the outside area inclination angles up to 55°, and for stairs in engine rooms and boiler rooms inclination angles up to 60° are admissible.