Section 5 Side scuttles and windows

5.1.1 Side lights, portlights and portholes are considered to be side scuttles.

5.1.2 Side scuttles are defined as being round or oval openings with an area not exceeding 0,16 m².

5.1.3 Windows are defined as being rectangular openings generally, and round or oval openings with an area exceeding 0,16 m².

5.1.4 A plan showing the location of side scuttles and windows is to be submitted.

5.1.5 Side scuttles and windows together with their glasses and deadlights if fitted, are to be of an approved design or in accordance with a specified standard(s).

5.1.6 Side scuttles to spaces within enclosed superstructures, or deckhouses on or above the weather deck are to be fitted with efficient, hinged, inside deadlights and capable of being effectively closed and secured watertight.

5.1.7 All side scuttles are to be of the non-opening type.

5.1.8 Windows are not to be fitted below the lowest weather deck or in end bulkheads of superstructures.

5.1.9 If fitted in a deckhouse or superstructures in the forward 0,25L _R, windows are to be provided with strong, hinged, steel, weathertight storm covers. However, if there is an opening leading below deck, this opening is to be treated as being on an exposed deck and is to be protected as required by Vol 1, Pt 3, Ch 4, 2.2 Hatch coamings 2.2.1

5.1.10 Side scuttles and windows set inboard from the shell on the weather deck, protecting direct access below, are either to be provided with strong permanently attached deadlights or, where they are accessible, strong permanently attached external steel storm covers instead of internal deadlights.

5.1.11 Side scuttles and windows set inboard from the shell on the weather deck, not protecting direct access below, do not require deadlights or storm covers.

5.1.12 Cabin bulkheads and doors are considered to provide effective protection between side scuttles or windows and access below.

5.1.13 Where windows are permitted in an exposed bulkhead on the weather deck in the forward 0,25L _R , strong external storm covers which may be portable and stored adjacent are to be provided.

5.1.14 Where the bridge is on, or not more than 5,0 m above, the weather deck in lieu of storm covers being provided for the bridge windows, a weathertight cover, fitted to a coaming of not less than 230 mm in height around the internal stairway opening within the bridge, may be accepted. If this arrangement is accepted, adequate means of draining the bridge are to be provided.

5.1.15 If necessary, for practical considerations, the storm covers may be in two parts.

5.1.16 Laminated toughened safety glass may also be used for windows but the total thickness will need to be greater than that required for the equivalent sized window using monolithic toughened safety glass. The equivalent thickness of laminated toughened safety glass is to be determined from the following formula:

where

Alternative arrangements that do not meet the above thickness requirement will be specially considered, provided that equivalent strength and bending stiffness to that of a single, thermally toughened pane of thickness T _s can be demonstrated in a four-point bending test in accordance with EN-ISO 1288-3 or an equivalent recognised National or International Standard, using no fewer than ten samples. The lower limit of the 90 per cent confidence level interval for the laminated pane shall not be less than the same for monolithic toughened safety glass. Small scale punch test or ring-in-ring test methods shall not be used.

5.1.17 Rubber frames are not acceptable for windows.