HATCH COaMINGS

603

(ii) This ia a, hatch end.

B—The athwartship coaming.

62—Carrier for the end of the portable fore and aft beam K to
rest in. Length of bearing 3 inches.

61—Angle connecting coaming to deck plating.

/—Wood hatch covers at least 2J inches thick.

#4—Ledge 2^ inches broad for hatch covers to rest on.

g—Tarpaulin.

a6—Cleats 2 feet apart and 2£ inches wide.

e—Flat iron bar to grip the tarpaulin when wedged up tight at
the cleats.

Deep Tank Top.—Fig. 9 illustrates a method of making the
portable top of a tank watertight or oiltight. Note the washer of
soft material, rope or rubber usually, between the top edge of the

WATE<?T>CHT
HATCHWAY

Tank Top.

coaming and the tinder side of the steel <?over, and how close contact
is secured by means of numerous bolts and nuts rouixl the coaming.
Wing nuts are usually fitted to the deck hatches of oil tankers*
Note also the hinged bolts which fit into slots in the edge of the
cover.