Bulkhead

Bulkheads are partitions, by which compartments, rooms, etc., in ve els are formed; or the hold of a ship divided. They are principally fitted in the interior of steamers, and constructed (according to the size of the ship) of plating from */« to '/2 inch thick; those fitted tranversely from side to side are usually placed between double-frames, and extending from the floor up to the weather-deck. On oue side they are strengthened by vertically fitted angle-bars, spaced about 30'inches apart; and on the other side by horizontal angle-bars, spaced about 48 inches; the latter as a rule below the lower-deck only; sailing-ve els have generally only one transversal-bulkhead below the deck, viz*a collision bulkhead; paddle-steamers have at least three; viz‘ a collision-bulkhead, one placed on the fore, and one on the after end of the engine and boiler-room. Screw-Steamers have at least four bulkheads; viz1; collision—, stoke-hold—, engine-room—, and stuffing-box-bulkhead. In steamers of great length, additional transversal-bulkheads are fitted between the collision-, and the stoke-hold-bulkhead; and between the engine-room—, and stuffing-boxbulk-head. See Plates 9. 23 A, B, C & D.