Regulation 23 - Structure

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Regulation 23 - Structure

23.2.1 Insulation of aluminium decks and interpretation of “load-bearing divisions”

1 When spaces of category (1) to (10) in regulation II-2/26 or of category (1) to (5) and (10) in regulation II-2/27 are located on top of aluminium decks, the deck does not need to be insulated from the upper side, provided the deck is protected by a not readily ignitable deck covering.
2 Load-bearing division is a deck or bulkhead including stiffeners, pillars, stanchions and other structural members which, if eliminated, would adversely affect the designated structural strength of the ship.

23.3 Insulation of crowns and casings of machinery spaces of category A

Crowns and casings of machinery spaces of category A should be insulated in compliance with the tables in regulations II-2/26 and II-2/27. Accordingly, crowns and casings exposed to air need not be insulated, except those facing category (4) deck areas of regulation II-2/26.

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