Engineering Wonders of the World
Volume I

THE EQUIPMENT OF A MODERN SHIPYARD. ing of the Mauretania. In the foreground may be observed the keel plates supported on the blocks, and immediately above is the centre keelson, while amidships the double bottom is in position almost ready for the erection of the frames. While the keel is being laid, the frames, or with holes at regular intervals. The frame is then drawn from the furnace, and while hot is bent by the frame-turners to the required shape and given the necessary bevel. During the bending process the frame is held in posi- tion by a series of iron pins, or dogs, placed in the holes in the bending slabs. The frames Fig. 9.—KEEL AND PART OF DOUBLE BOTTOM OF THE MAURETANIA.’ W i»» i i ” Ü < ,1 ! 8? • ■ * . M ‘ * O'., * T: - \ "T, & ' -.<* «/It .. .* i r> ribs of the ship, are being bent and prepared. From the form shown by the scrive-boards a light iron “ set,” or mould, is * Fram’n& a ma(je for the guidance of the Vessel. frame-turners in bending the frames on the slabs. These bending slabs are of iron, of an area large enough to enable the largest frames to be dealt with, and are pierced are usually bent by hand, but recently a form of hydraulic bender has been introduced. (See Fig. 8.) The frames, after being prepared as described, are brought to the building berth and erected in position, being held there and faired by means of wooden shores and “ ribbands.” These ribbands are long lengths of timber