Section 3 Windows

301. Windows

1. Windows are generally to be of toughened safety glass. Except for front windows in the wheel house other materials may be found acceptable based on consideration of strength, impact resistance and ageing properties.

2. Window glass with baked-in heating elements, bolted mechanical fastenings or other strength re- ducing arrangements, are to be specially considered with regard to thickness.

3. Window glass are in general to be firmly mounted in stiff fames with due respect to impacts. In superstructures and deckhouses other type of mounting, gluing etc. are to be documented to the sat- isfaction of the surveyor. In the aft ends of superstructures and deckhouses large windows may be accepted.

4. The thickness of toughened safety glass panes above the bulkhead deck is in general not than:

to be less

mm

= small dimension of window openings (mm )

= factor, taken from Table 4.3.2, dependent on the aspect ratio of the window.

Fig 4.3.2 Diagram for Factor

for Windows

5. The thickness of glasses in the hull sides is to be according to Pt 4, Ch 8, Sec 9 of Rules of the Classification of Steel Ships. Windows below the waterline will be specially considered.

303. Deadlights

1. The number of deadlights in relation to number of windows depending on the service restriction notation, is to be as given in Table 4.3.3.

Table 4.3.3 Number of Deadlights

2. Deadlights are to be interchangeable port and starboard.

3. Deadlights are to be stowed in such a way as to provide quick mounting. Deadlights for which there is 100 % requirement, are to provide protection for intact windows. Other deadlights are to provide temporary replacement of damaged windows and may be mounted internally or externally over window openings.