2 Definitions
Clasification Society 2024 - Version 9.40
Statutory Documents - IMO Publications and Documents - Resolutions - Maritime Safety Committee - Resolution MSC.133(76) - Adoption of Technical Provisions for Means of Access for Inspections - (adopted on 12 December 2002) - Annex - Technical Provisions for Means of Access for Inspections - 2 Definitions

2 Definitions

 For the purpose of these Technical provisions, the following definitions apply in addition to those provided in the 1974 SOLAS Convention, as amended, and in resolution A.744(18), as amended:

  • .1 Rung means the step of a vertical ladder or step on the vertical surface.

  • .2 Tread means the step of an inclined ladder, or step for the vertical access opening.

  • .3 Flight of an inclined ladder means the actual stringer length of an inclined ladder. For vertical ladders, it is the distance between the platforms.

  • .4 Stringer means:

    • .1 the frame of a ladder; or

    • .2 the stiffened horizontal plating structure fitted on the side shell, transverse bulkheads and/or longitudinal bulkheads in the space. For the purpose of ballast tanks of less than 5 m width forming double side spaces, the horizontal plating structure is credited as a stringer and a longitudinal permanent means of access, if it provides a continuous passage of 600 mm or more in width past frames or stiffeners on the side shell or longitudinal bulkhead. Openings in stringer plating utilized as permanent means of access shall be arranged with guard rails or grid covers to provide safe passage on the stringer or safe access to each transverse web.

  • .5 Vertical ladder means a ladder of which the inclined angle is 70° and over up to 90°. A vertical ladder shall not be skewed by more than 2°.

  • .6 Overhead obstructions mean the deck or stringer structure including stiffeners above the means of access.

  • .7 Distance below deck head means the distance below the plating.

  • .8 Cross deck means the transverse area of the main deck which is located inboard and between hatch coamings.

Parent topic: Annex - Technical Provisions for Means of Access for Inspections
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