TM 55-607/NAVSEA OP 3221 Rev 2
Square of the hatch-The hatch opening.
Stiffeners-The vertical metal columns employed in the ship's structure to stiffen a permanent bulkhead.
Stringers-Long lengths of wide lumber connecting and supporting uprights in a frame to maintain the
integrity of the structure.
Stripping-Lumber laid over the stow for protection from the overstow.
Strip sheathing-The vertical risers nailed to the sweatboards for protection of the stow and to permit
attachment of the appropriate dunnage structure.
Structural lumber-One of the three main classes of softwood lumber. It is graded on the basis of strength
and its intended use in applications.
Sweatboards-Lumber running horizontally and mounted in hangers along the skin of the ship to protect
cargo from contact with moisture or sweat, which condenses on the interior of the hull; also termed
Tier-A course or stratum of unit loads parallel to the deck and one unit load in height. The first tier (or
bottom tier) is the tier of unit loads stowed on the deck.
-A full floor capable
of supporting forklift equipment installed
to facilitate stowage
cargo; also termed "machine" floor at certain shiploading activities.
Tomming-The securing of cargo so that it cannot move upwards. Compare with "shoring."
Topping lift--Tackle that supports the head of a boom.
Void-Spaces between units of cargo in stowage and between units of cargo and ship's structure.
Void table-Prefabricated structure used in voids for supporting load above.
Whaler-Length of board fastened to a series of uprights on the side opposite the load-bearing surface for
the purpose of stiffening and aligning the structure.
Whips-The portion of the cargo-hoisting falls that fastens to the cargo hook and is usually identified as
either the yard whip or the hatch whip. The yard whip is on the inshore boom; the hatch whip is on the
Wings-The outboard area of the ship's compartment near the hull.
Yard lumber-One of the three main classes of softwood lumber. It consists generally of lumber that is less
than 5 inches in thickness and that is intended for general building purposes.