Minutes of Proceedings of the Institution of Civil Engineers Volume 3

Minutes of Proceedings of the Institution of Civil Engineers Volume 3

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1844 edition. Excerpt: ...where such scaffolding was used. Mr. Colthurst stated, that at Devonport there was a column built Mr. Coltof granite from Holman's Hill Quarry, near the Tamar. The shaft hurstwas 11 feet in diameter; its height, from the bottom of the shaft to the top of the capital was 65 feet 4 inches. The total height of the column, with its inferior and crowning pedestals, was 101 feet 4 inches. Its height above the street, including the rock on which it stood, was 124 feet. The abacus of the capital was composed of four stones, each weighing between 3 and 4 tons. The stones of the column were raised and set, entirely without the use of scaffolding, by means of a series of tall spars joined together (Fig. 3); the lowest being fixed into the ground and braced by diagonal pieces, was lashed and strutted to the lower part of the shaft. A gaff, with a jaw at the lower end, was then slung in the throat by a strong rope or chain, so as to work round the upright spar, in the jaw prepared for this movement; from the end of the gaff, blocks and a fall were suspended, in such a manner as to command every part of the work, by raising or depressing the point of the gaff, to increase or diminish its range. Crab winches sufficed to raise the stones; and it was stated that the work was executed in a very short time.J Mr. Rendel had seen this column while in course of construction; Mr. Renthe derrick appeared to act well, and it was certainly a cheap mode of raising the materials. Mr. Smith said, that in a recent visit to Liverpool, he had Mr. C. H. observed an ingenious mode, adopted by Mr. Tomkinson, for raising ml building materials, which almost superseded the use of external Vide ' The Public Buildings erected in the West of England;' by John Foulston. 4to....show more

Product details

  • Paperback | 138 pages
  • 189 x 246 x 8mm | 259g
  • Rarebooksclub.com
  • English
  • Illustrations, black and white
  • 1236952960
  • 9781236952967