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SHIP'S BOLLARDS (STANDARD).

Bollards are invariably made of cast iron of good quality, and should be fairly smooth castings. In sınall yacht and high class work they are sometimes made of gunmetal, and in battleships of steel. The bolt holes should not be cored but drilled and countersunk afterwards, the bolts being of BB iron or steel with full countersunk heads.

The diameter B of the barrel should be in accordance with the sizes given in the table, opposite the corresponding length of vessel, and with this dimension as a unit the proportionate sizes of the various parts calculated from the appended proportion table and diagram :

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N.B. — The extra heavy bollards on forecastle head and quarters should in larger than given in table for the corresponding length of ship.

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Outside diameter

Diameter bottom Sheave. of groove.

Thickness.
Pin.

Wire.
Hinge Short strap.

Long strap.
Hook

S Diameter.

Opening.
Length over all.

Width.
Block...]

Thickness.
Weight..

81 10 111 134 151 13 13 11 11 14 1} 11 11 11

1 2x} 24x7 24X7 31X1 31 X} 2X 27 X1 2} } 31 Xi 31 X1 15 11 13 2

21 2 24 21 23 3 24 27 30 39

46 101 15 17

19 3 31 41 4} 48 lbs. 70 lbs. 104 lbs. 140 lbs. 175 lbs.

G
H
1
J
K

127

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DIAMOND WIRE ROPE BLOCKS.

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