Page:United States Statutes at Large Volume 47 Part 2.djvu/706

 2310 INTERNATIONAL LOAD LINE CONVENTION. JULy 5, 1930. Class 2 closing ap- pliances. appliances, and the latter are so arranged that they can be closed and secured from both sides of the bulkhead or from the deck above. The sills of the access openings are at least 15 inches above the deck. Rule XLIV. -Olass 2 Closing Appliances. These appliances are (a) strongly framed hard wood hinged doors, which are not more than 30 inches wide nor less than 2 inches thick; or (b) shifting boards fitted for the full height of the opening in chan- nels riveted to the bulkhead, the shifting boards being at lea&t 2 inches thick where the width of opening is 30 inches or less, and in- creased in thickness at the rate of 1 inch for each additional 15 inches of width, or (c) portable plates of equal efficiency. su::ct~nJ:~.ln Temporary Appliances Jor Closing Openings in Superstructure Deck,. Rule XLV. anTarmstroBot (talk)rary appli- Temporary closing appliances for middle line openings in the deck of an enclosed superstructure consist of- Effective length of detached superstruc- tures. General rule. Ante, p. 2306. (a) a steel coaming not l~ss than 9 inches in height efficiently riveted to the deck; (b) hatchway covers as required by Rule X, secured by hemp lashings; and (c) hatchway supports as required by Rules XI and XII and Table 1 or 2. EJlective Length oj Detached Super8tructures. Rule XLVI. -General. Where exposed bulkheads at the ends of poops, bridges, and forecastles are not of efficient construction (see Rule XLII) they are considered as non-existent. Where in the side plating of a superstructure there is an opening not provided with permanent means of closing, the part of the superstructure in way of the ope:ring is regarded as having no effective length. Where the height of 80 superstructure is less than the standard ita length is reduced in the ratio of the actual to the standard height. Where the height exceeds the standard, no increa.se is made in the length of the superstructure.