an outline of ship building, theoretical and practical

This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1873 Excerpt: ...vertical to the centre line of the keel; a plumb-boD is hung to the centre of the cross-spall before raising the frame to centre it by; the frame is then secured by placing shores under it, and at the wale height, and by shores placed at an angle from the head forward-and-aft to hold it firmly in its true position when regulated as those forward-and aft are regulated from it. The operation of framing is commenced at dead-flat, and carried on both forwards and aft at the same time. OHAPTEE III. Regulating the Frame--Knight-Heads--Cants--Hawse-Pieces--Chocks--Fillings--Keelsons--Main Keelson--Sister Keelsons--Boiler or Bilge Keelsons. REGULATING?' THE FRAME. When the frames are first raised, they are secured in a temporary manner by placing shores under them, and small pieces of plank, called stay-lathes, are nailed from the head of one frame to another; an iron blunt bolt is then driven through the heel of the first f uttock or floor into the keel one-half of its depth. The frames are secured in their position until the outside planking is brought on, by pieces of oak or yellow pine plank, from five to seven inches square, extending the length of the square-body called ribbands, and at the extremities, or where they cross the cant bodies, by pieces formed to the curve of the body called harpins; and at the sirmarks, where the ribbands, and harpins cross the frames, they, are attached to them with screw bolts called ribband-screws, the upper end of the ribband-screw having an eye worked in it to admit of turning it in with a lever. The sirmarks spoken of above are transferred from the frame moulds to the timbers of the frame; they mark the point at which the bevellings are to be applied, also the head and heel of each timber of the frame; the lines laid down ...