JUNE 1.] THE NEW ZEALAND GAZETTE. 1507

(20) When wire stays are used in lieu of shores for either permanent
or non-permanent fittings, the following minimum sizes will be
required :—
(a) 3 in. flexible steel-wire-rope stays, fitted horizontally.
(b) 1¼ in. rigging screws, which preferably should be fitted at the
side of the ship for convenience and easy access for tightening.
(c) 1 in. shackles.
(d) 1¼ in. screw bolts through wood or angle-bar uprights.
(e) Four ⅞ in. nut and screw bolts, for securing the wood uprights
or steel angle bars together.
(f) 1 in. eyeplates, efficiently riveted to side stringers or frames,
or 1 in. shackle through frame.

(21) Where no special arrangements are made for grain-tight
filling between the beams, wood filling-pieces the same thickness as
the shifting-boards must be fitted grain-tight between the beams,
and must be secured in place by cleats at both ends and fitted
both sides. The cleats are to be at least 2 in. by 4 in., and must
extend the full depth of the filling-piece and as much again below,
and be securely nailed or spiked to the shifting-boards and filling-
pieces.

(22) Where permanent steel uprights and wire stays are fitted
which have been approved by the Board of Trade or any authority
administering regulations approved by the Board of Trade, the
maximum unsupported span allowed for boards of various thicknesses
is as follows :—

(23) Where steel uprights are secured as approved at both head
and heel one wire stay on each side of each upright will be accepted
in holds 20 ft. and under in depth, to be placed approximately one-
third down from under deck. Over 20 ft. two wire stays on each side
of each upright will be required, the upper stays to be placed ap-
proximately one-quarter down from under deck and the lower stays at
half-depth of hold. In after holds depth to be measured to tunnel-top.

(24) The following dimensions are recommended for angle-bar
uprights :—
Each upright to consist of four angle bars 4 in. by 4 in. by 0·40
and steel plate 11½ in. by 0·50 riveted to form one complete structure
allowing 4 in. housings on both forward and aft sides ; equivalent
brackets riveted to head and heel of uprights, each to take five ⅞ in.
bolts with corresponding lugs and/or angles on tank-top, tunnel-top,
and hatch-webs.

CONSTRUCTION OF FEEDERS AND WOOD BULKHEADS.

10. (1) The walls of trunk feeders and wood bulkheads must be
    of sufficient strength to withstand the pressure due to the head of
    grain contained, and must be made grain-tight.

(2) Trunk feeders in the ’tween decks contructed in the hatchways
must be made grain-tight around the hatch-coamings and hatch-
beams.

(3) Ships having one or more decks with one continuous hold
forward and/or one continuous hold aft with two hatches to each
hold shall have a well-constructed bulkhead extending from side to
side of the ship between the two hatches to divide the space.

(4) Thwart ship bulkheads in holds for partitioning holds or reserve
bunkers shall be constructed of planks not less than 3 in. in thickness,
efficiently stiffened and shored.

(5) Trunk feeders in the ’tween decks fitted in the hatchways
may be constructed of planks worked vertically of a minimum
thickness of 2 in. When the vertical unsupported span exceeds
8 ft. thicker planks must be used, or increased stiffening must be
fitted, as the Surveyor may require.

(6) Where more convenient, feeders may be constructed of studding
and lined with grain-tight boards 2 in. or two 1 in. layers of shiplap,
laid horizontally with broken joints. Studding where possible should
be placed inside the hatch-coamings and must be not less than 4 in.
by 6 in. on edge spaced not more than 2. centres.