polyurethanes are used to make automobile seats in a remarkable manner. the seat manufacturer has a mold for each seat model. the mold is a closeable 'clamshell' sort of structure that will allow quick casting of the seat cushion, so-called molded flexible foam, which is then upholstered after removal from the mold.
the standard utility pole in the united states is about 40 ft 12 m long and is buried about 6 ft 2 m in the ground. however, poles can reach heights of 120 ft 37 m or more to satisfy clearance requirements.
boat building is the design and construction of . plywood is especially popular for amateur construction but only marine ply using waterproof glues and even laminates should be used. cheap construction plywood often has voids in the interior layers and is not suitable to boat building as the voids trap moisture and accelerate rot as well as physically weaken the plywood. no plywood is rot .
another popular naming convention is numbering the main deck 1, the deck below it 2 or the second deck , and the deck below that the third deck, and so forth. decks above the main deck may be named, like the bridge deck or poop deck , 8 or they may be numbered upwards from the main deck with a zero prefix: 01 above the main deck, 02 deck above 01, and so forth.
a compartment is a portion of the space within a ship defined vertically between decks and horizontally between bulkheads.it is analogous to a room within a building, and may provide watertight subdivision of the ship's hull important in retaining buoyancy if the hull is damaged. subdivision of a ship's hull into watertight compartments is called compartmentation.
steve sees the progress on the new addition, including a roof joist system of 1 x 12 lvls, necessitated by the room's high ceiling height. inside, tom and master carpenter norm abram show him how they are stiffening up a bouncy third floor by sistering 1/8' steel sheets to the floor joists from below. richard trethewey checks out a software .