New Zealand Gazette – 1934 – No. 77

Page 3256

✨ Marine Safety Regulations



3256
THE NEW ZEALAND GAZETTE.
[No. 77

$f_2$ is a coefficient depending on K, which is the vertical distance
in feet from the top of the lowest tier of beams at side to a point
7 feet 6 inches above the freeboard deck at side, or, if there is a
superstructure, to a point 12 feet 6 inches above the freeboard deck
at side (see Figure 2). The values of $f_1$ and $f_2$ are obtained from the
following tables :—

H in feet .. 0 7 9 11 13 15 17 19 21 23 25
$f_1$ .. 9 11 12·5 15 19 24 29·5 36 43 51 59
K in feet .. .. .. 0 5 10 15 20 25 30 35 40
$f_2$ .. .. .. 0 0·5 1·0 2·0 3·0 4·5 6·5 9·0 12·0

Intermediate values are obtained by interpolation.

This formula applies where D is between 15 feet and 60 feet, both
inclusive, B is between $\frac{L}{10} + 5$ and $\frac{L}{10} + 20$, both inclusive, $\frac{L}{Ds}$ is
between 10 and 13·5, both inclusive; and the horizontal distance
from the outside of the frame to the centre of the first row of pillars
does not exceed 20 feet.

In single deck ships of ordinary form, where H does not exceed
18 feet, the frame modulus determined by the preceding method is
multiplied by the factor $f_3$ where

$f_3 = 0·50 + 0·05·(H - 8).$

Where the horizontal distance from the outside of the frame to
the centre of the first row of pillars exceeds 20 feet, the Assigning
Authority is to be satisfied that sufficient additional strength is
provided.

    ↑
    |
    |←7-6,OR 12-6 IF THERE
    | IS A SUPERSTRUCTURE.
    |
    ↓
    FREEBOARD DECK.
    |
    |
    |
    K
    |
    |
    |
    ↓
    CENTRE OF
    DISC. ↑
    |
    |
    |
    ↓
    LOWEST TIER OF BEAMS.
    |
    |
    ↑
    ← MIDDLE OF BEAM BRACKET.
    |
    |
    |
    H
    |
    |
    d.
    |
    |
    |
    ↑
    LINE MIDWAY BETWEEN
    TOP OF INNER BOTTOM AT
    SIDE AND TOP OF HEEL
    BRACKET
    ↓
    |
    |
    |
    C
    |
    |
    ↓
    ↓. TOP OF KEEL.

FIGURE 2.



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✨ LLM interpretation of page content

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

🚂 Transport & Communications
Load Lines, Merchant Ships, Marine Safety, Regulations, Frame Modulus, Freeboard Deck