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New Zealand Gazette – 1934 – No. 77

Page 3249

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✨ Marine Safety Regulations

Oct. 12.] THE NEW ZEALAND GAZETTE. 3249

TABLE 1.

(Coamings 24 in. in height.)

HATCHWAY Beams and Fore-and-afters for Ships 200 ft. or more in length.*

HATCHWAY BEAMS.

Breadth of Hatchway.	Mounting.	Beams with Fore-and-Afters. Spacing Centre to Centre.			Beams without Fore-and-Afters. Spacing Centre to Centre.
		6' 0"	8' 0"	10' 0"	4' 0"	5' 0"
	In. In. In.	In. In.	In. In.	In. In.	In. In.	In. In.
10' 0"	3 × 3 × 0·40A	11 × 0·30P	12 × 0·32P	14 × 0·34P	9 × 0·46BP	10 × 0·50BP
12' 0"	3 × 3 × 0·40A	12 × 0·32P	14 × 0·34P	17 × 0·36P	11 × 0·50BP	12 × 0·50BP
14' 0"	3 × 3 × 0·42A	14 × 0·34P	17 × 0·36P	20 × 0·38P	12 × 0·50BP	12 × 0·32P
16' 0"	3½ × 3 × 0·42A	16 × 0·36P	19 × 0·38P	22 × 0·38P	12 × 0·32P	14 × 0·34P
18' 0"	4 × 3 × 0·44A	18 × 0·36P	21 × 0·38P	25 × 0·40P	14 × 0·34P	16 × 0·36P
20' 0"	4 × 3 × 0·44A	20 × 0·38P	24 × 0·40P	28 × 0·42P	15 × 0·34P	18 × 0·36P
22' 0"	4½ × 3 × 0·46A	22 × 0·38P	26 × 0·42P	30 × 0·44P	16 × 0·36P	19 × 0·36P
24' 0"	5 × 3½ × 0·46A	23 × 0·40P	28 × 0·42P	32 × 0·44P	17 × 0·36P	20 × 0·38P
26' 0"	5½ × 3½ × 0·48A	24 × 0·40P	29 × 0·42P	34 × 0·46P	18 × 0·36P	21 × 0·38P
28' 0"	6 × 3½ × 0·50A	25 × 0·40P	31 × 0·44P	36 × 0·48P	19 × 0·38P	22 × 0·38P
30' 0"	6 × 3½ × 0·52A	26 × 0·42P	32 × 0·44P	38 × 0·48P	20 × 0·38P	23 × 0·40P

*See footnote at end of table.

FORE-AND-AFTERS.

Length of Fore-and-Afters.	Mounting.	Bulb Plate. Centre Fore-and-Afters. Spacing Centre to Centre.			Bulb Angle. Side Fore-and-Afters. Spacing Centre to Centre.
		3' 0"	4' 0"	5' 0"	3' 0"	4' 0"	5' 0"
	In. In. In.	In. In.	In. In.	In. In.	In. In. In.	In. In. In.	In. In. In.
6' 0"	2½ × 2½ × 0·36	6 × 0·36	6½ × 0·38	7 × 0·38	6 × 3 × 0·36	6½ × 3½ × 0·38	7 × 3½ × 0·38
8' 0"	2½ × 2½ × 0·38	7 × 0·42	8 × 0·44	9 × 0·44	7 × 3½ × 0·42	8 × 3 × 0·44	9 × 3½ × 0·44
10' 0"	2½ × 2½ × 0·40	8 × 0·50	9½ × 0·50	11 × 0·50	8 × 3½ × 0·50	9½ × 3½ × 0·50	11 × 3½ × 0·50

	Wood Centre Fore-and-Afters. Spacing Centre to Centre.						Wood Side Fore-and-Afters. Spacing Centre to Centre.
	3' 0"		4' 0"		5' 0"		3' 0"		4' 0"		5' 0"
	D	B	D	B	D	B	D	B	D	B	D	B
	In.	In.	In.	In.	In.	In.	In.	In.	In.	In.	In.	In.
6' 0"	5½	7	6	7	6½	7	5½	5½	6	6	6½	6
8' 0"	6½	7	7½	7	8	7	6½	6½	7½	7	8	7
10' 0"	8	7	8½	8	9	9	8	7	8½	8	9	9

A = Plain angle. BP = Bulb plate. P = Plate D = Depth. B = Breadth

Depths for hatchway beams are at the middle of the length and are measured from the top mounting to the lower edge. Depths for fore-and-afters are measured from the under side of the hatch covers to the lower edge. Sizes for intermediate lengths and spacing are obtained by interpolation. Where plate are specified, two angles, of the sizes given for mountings, are to be fitted at the upper and at the lower part of the beam. Where bulb plates are specified, two angles, of the size given for mountings, are to be fitted at the upper part of the beam or fore-and-after. Where bulb angles are specified, one angle, of the size given for mountings, is to be fitted at the upper part of the section. Where the specified flanges of an angle are of different dimensions, the larger flange is to be horizontal.

*In ships not exceeding 100 feet in length, the depths of beams which are formed of plates and angles may be 60 per cent. of the depths given above; the depths of beams and steel fore-and-afters formed of bulb angle or bulb plate section may be 80 per cent. of the depths given above; the thickness of plates, bulb angles and bulb plates should correspond to the thickness tabulated for the reduced depths with a minimum thickness of 0·30 inch; the depths and breadths of wood fore-and-afters may be 80 per cent. of those given in the tables for side fore-and-afters, but the centre fore-and-afters must be not less than 6½ inches wide. In ships between 100 feet and 200 feet in length, the sizes of the beams and fore-and-afters are to be determined by linear interpolation.

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VUW Te Waharoa — NZ Gazette 1934, No 77

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✨ LLM interpretation of page content

🚂 Rules for determining Maximum Load Lines of Merchant Ships (continued from previous page)

Domain🚂 Transport & Communications
KeywordsLoad Lines, Merchant Ships, Marine Safety, Regulations, Hatchway Beams, Fore-and-Afters, Dimensions, Specifications

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