ms Seven Seas Mariner is a passenger cruise ship with identification IMO number 9210139, MMSI number 311622000 and call-sign number C6VV8, registered in the Bahamas. The cruise ship is owned by NCL Norwegian (since 2014) and operated by Regent Seven Seas Cruises. The vessel debuted in 2001.
IRC 2003 Handrail height, measured vertically from the sloped plane adjoining the tread nosing, or finish surface of ramp slope, shall be not less than 34 inches (864mm) and not more than 38 inches (965 mm).
In all buildings, handrail heights should be between 900mm and 1000mm measured from the pitch line to the top of the handrail. Lay a straight edge, long enough to cover several steps, on the stairs. The pitch line will be the underside of the straight edge (assuming no carpets are fitted).See below.tairs should have a handrail on at least one side if they are less than 1m wide. They should have a handrail on both sides if they are wider. You do not need a handrail on the first two steps up.