The Civil engineer and architect’s journal, scientific and railway gazette . Thetotal length of this work is 830 feet, the height is 87 feet to theplatform, and the width across between the railing is

The Civil engineer and architect’s journal, scientific and railway gazette . Thetotal length of this work is 830 feet, the height is 87 feet to theplatform, and the width across between the railing is 14 feet. Ithas seven arches, five of 120 feet, and two of 110 feet spiin each,with a versed sine of 30 feet. There are only two ribs, 8 feet 4inches apart, in each arch, and of a deal and a half (1 foot 4 inches)in width, and ten deals (2 feet 7 inches) in depth. Tlie longitudi-nal beams are half balks of timber, 13| inches by 6j inches. Thereare two stone abutments, each 40 feet long, and five s

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The Civil engineer and architect’s journal, scientific and railway gazette . Thetotal length of this work is 830 feet, the height is 87 feet to theplatform, and the width across between the railing is 14 feet. Ithas seven arches, five of 120 feet, and two of 110 feet spiin each, with a versed sine of 30 feet. There are only two ribs, 8 feet 4inches apart, in each arch, and of a deal and a half (1 foot 4 inches)in width, and ten deals (2 feet 7 inches) in depth. Tlie longitudi-nal beams are half balks of timber, 13| inches by 6j inches. Thereare two stone abutments, each 40 feet long, and five stone piers.The largest pier is 91 feet high from the foundation, which is 5 feetbelow the surface. All the piers are 10 feet thick at the springing, 12 feet 10 inches wide, and 5 feet 4 inches thick at the top, under-neath the roadway. The total cost was :—masonry, 3, 617/.; car-pentry, 3, 358/.; together, 6, 975/., which is a very small amount fora work of such magnitude. AM.€HEm> TIlMlBflili yiAlDiTCITS, DtNTlNO VALE VIADUCT HALK tLtVATlON /%, ^, LONGITUDINAL SECTION. C B 1918] THE CIVIL ENGINEER AND ARCHITECTS JOURNAL. 35 The great height and length of this bridge, and the extremelightness of its construction, render it an imposing object, spanninga beautiful and thickly wooded ravine near Dalkeith Palace, withthe river Esk streaming through it, and appearing as a mere lineof water in passing under the centre arch, which is the largest andhighest. The system of arching with planks, may be carried to almost anyextent, and in Messrs. Greens design for the proposed bridgeacross the Tyne, to connect the towns of Newcastle and Gateshead, at a high level, the largest arch over the middle part of the riverwas intended to have been 280 feet span, with a versed sine of 70feet, the total length of the bridge as designed was 1, 220 feet, andthe height 110 feet.