Section 3 Machinery Openings

301. Protection of Machinery Openings

Machinery openings are to be as small as possible, and to be enclosed by casings.

302. Casings of Machinery Openings in Exposed Parts

1. Exposed machinery openings on the upper decks and superstructure decks are to be in accordance with the requirements in the following:

(1) The thickness of casings and the section modulus of stiffeners thereupon, are to be equivalent to those of boundary walls of deckhouses specified in Ch 15, 201.

(2) The thickness of top laminates of casings and the section modulus of stiffeners thereupon, are

not to be less than 4.0 mm and 24 cmĮ respectively.

2. The height of casings is not, except special cases, to be less than that of bulwarks.

3. Where access openings are provided on the exposed machinery casings, these openings are to be

located in protected requirements in Ch

spaces as far as practicable, the doors thereof are to be in accordance with the

15, 202. 1 and the height of sills above the upper surface of deck laminates

is to be at least 380 mm .

303 Machinery Casings provided in Enclosed Parts

Where access openings are provided of the machinery casings, the doors thereof are to be substantial.

304 Position of Fittings

Skylights provided on the top laminates of machinery casings are to be of substantial construction and coamings of funnels and ventilators are to be provided as high as possible above the weather deck laminates.