✨ Marine Safety Regulations
TABLE 2.
(Coamings 18 in. in height.)
HATCHWAY Beams and Fore-and-afters for Ships 200 ft. or more in length.*
HATCHWAY BEAMS.
| Breadth | Mounting. | Beams with Fore-and-Afters. | Beams without Fore-and-Afters. |
|---|---|---|---|
| Spacing Centre to Centre. | Spacing Centre to Centre. | ||
| 6' 0" | 8' 0" | 10' 0" | 4' 0" |
| In. | In. | In. In. | In. In. |
| 10' 0" | 3 x 3 x 0.40A | 9½ x 0.46BP | 10½ x 0.50BP |
| 12' 0" | 3 x 3 x 0.40A | 11 x 0.50BP | 11 x 0.30P |
| 14' 0" | 3 x 3 x 0.42A | 11 x 0.30P | 13 x 0.32P |
| 16' 0" | 3½ x 3 x 0.42A | 12 x 0.32P | 15 x 0.34P |
| 18' 0" | 4 x 3 x 0.44A | 14 x 0.34P | 17 x 0.36P |
| 20' 0" | 4 x 3 x 0.44A | 16 x 0.36P | 19 x 0.38P |
| 22' 0" | 4½ x 3 x 0.46A | 17 x 0.36P | 20 x 0.38P |
| 24' 0" | 5 x 3½ x 0.46A | 18 x 0.36P | 21 x 0.38P |
| 26' 0" | 5½ x 3½ x 0.48A | 19 x 0.38P | 22 x 0.38P |
| 28' 0" | 6 x 3½ x 0.50A | 20 x 0.38P | 23 x 0.40P |
| 30' 0" | 6 x 3½ x 0.52A | 21 x 0.38P | 24 x 0.40P |
- See footnote at end of table.
FORE-AND-AFTERS.
| Length of Fore-and-Afters. | Mounting. | Bulb Plate. | Bulb Angle. |
|---|---|---|---|
| Centre Fore-and-Afters. | Side Fore-and-Afters. | ||
| Spacing Centre to Centre. | Spacing Centre to Centre. | ||
| 3' 0" | 4' 0" | 5' 0" | 3' 0" |
| In. | In. | In. | In. |
| 6' 0" | 2½ x 2½ x 0.36 | 5 x 0.34 | 5½ x 0.36 |
| 8' 0" | 2½ x 2½ x 0.38 | 6 x 0.38 | 7 x 0.40 |
| 10' 0" | 2½ x 2½ x 0.40 | 7 x 0.44 | 8 x 0.46 |
| Wood Centre Fore-and-Afters. | Wood Side Fore-and-Afters. | |
|---|---|---|
| Spacing Centre to Centre. | Spacing Centre to Centre. | |
| 3' 0" | 4' 0" | 5' 0" |
| D | B | D |
| In. | In. | In. |
| 6' 0" | 5 | 7 |
| 8' 0" | 6 | 7 |
| 10' 0" | 7 | 7 |
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 underside of the hatch covers to the lower edge. Sizes for intermediate lengths and spacing are obtained by interpolation. Where plates 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
NZLII —
NZ Gazette 1934, No 77
✨ LLM interpretation of page content
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Rules for determining Maximum Load Lines of Merchant Ships
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🚂 Transport & CommunicationsLoad Lines, Merchant Ships, Marine Safety, Regulations, Hatchway Beams, Fore-and-Afters, Dimensions, Specifications