. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. Fig. 1.—Horizontal section of heel-post, and plan of the end of a bar. Vertical section of heel-post ana oar, forming a segment of a circle, somewhat larger than a semicircle, which admits of their being accurately turned in a lathe; they are li inch thick, at the thinnest part when finished ; but the straight faces are Ij inch thick, and have snugs cast on them, fig. 4, for bear- ing up the ends of the ribs, or horizontal bars, and holes for getting in the hand, to screw up
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. Fig. 1.—Horizontal section of heel-post, and plan of the end of a bar. Vertical section of heel-post ana oar, forming a segment of a circle, somewhat larger than a semicircle, which admits of their being accurately turned in a lathe; they are li inch thick, at the thinnest part when finished ; but the straight faces are Ij inch thick, and have snugs cast on them, fig. 4, for bear- ing up the ends of the ribs, or horizontal bars, and holes for getting in the hand, to screw up the bolts which fasten the ribs to the heel- posts. The heel-posts have each a cast iron socket, fitted into the bottom, working on an iron gudgeon 10 inches diameter, cast on a sole plate 4 feet 6 inches long by 1 foot 9 inches wide, and 2 inches thick, dove- tailed, sunk and riveted into the stone, after being keyed up, so as to press the heel-post hard into the quoin. After the hollow quoins, which are of Kingoodie stone, had been tressed down and polished as nearly as possible to the circle, but be- fore the gates had been framed togetlier, the heel-posts were set in their places, and were kept turning round, backwards and forwards, and hard keyed up, while sand and water were poured in at the top, till the stone and the iron were made to touch throughout in the height, so as to be perfectly water-tight. The mitre-posts fig. 3, are 18} inches broad and li inch thick, with snugs upon them for holding up the ends of the bars, and two flanches li inch in thickness for fastening the wooden mitres. Holes were cast in the mitre-posts for introducing an iron bar, to hold against the rivets of the last row of covering plates; but these holes were filled up, after the riveting was completed, by pins of iron, cast to fit them, and which were fixed into their places by corrosion. There are eleven horizontal bars, figs. 4 and 5, to each leaf, distri-. Please note that these images ar
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Keywords: ., boo, bookcentury1800, booksubjectarchitecture, booksubjectscience
