. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. T^ir^j^%i>7B0^P^t^.^^BP^^^^. ^f^^^ nected by plates to form the bottom skin. One end, called the forward end of the dock, is closedin permanently to the level of the top of the side girders; the other or after end is provided witha pan- of wrought-iron hinged gates, of the same height, to allow ships to pass in or out. In thecentre line of the dock, and between the cross girders, are short girders running longitudinally, andof the same depth as the cross girders. On the centre line of the dock, and on t
. Supplement to Spons dictionary of engineering, civil, mechanical, military, and naval. T^ir^j^%i>7B0^P^t^.^^BP^^^^. ^f^^^ nected by plates to form the bottom skin. One end, called the forward end of the dock, is closedin permanently to the level of the top of the side girders; the other or after end is provided witha pan- of wrought-iron hinged gates, of the same height, to allow ships to pass in or out. In thecentre line of the dock, and between the cross girders, are short girders running longitudinally, andof the same depth as the cross girders. On the centre line of the dock, and on the top flange of each. cross girder, is placed a timber keel block; and on the tops of the cross girders, at intervals asrequired, are placed timber bearers for carrying the bilge blocks. These last are mounted on slidingcarriages. The box girders are divided into compartments, those in the cenhe of the dock beingpermanent air chambers; while the end compartments, which are filled when the dock is submerged, 440 DOCKS. 2 6 5 0 3 8 409 6 406 0 400 0 15 0 6 0 are used, when required, as water-ballast chambers, the amount of water retained in each chamberbeing regulated by a 6-in. sluice valve worked from the top. In compartments of the side-boxgirders, at the forward or closed end of the dock, two engines with centrifugal pumps are placed,one on each side, for pumping the water from the interior of the dock. The suction pipes from thesepumps are of wrought iron, and are carried along inside the box girders as far as the centre of thedock, where they are brought out with cast-iron bends and bell mouths, extend
Size: 2279px × 1097px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1800, bookdecade1870, booksubjectenginee, bookyear1879
