. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1S45.] THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. A B-Rad 2"9.'i x2 BC = AB r> J!ix3U16-r 2 A E = sinobl. GO'^50' : R:: AB5-59 : AE .. B E = K : cotan ohl. GO' 50' :: A B 559 : B E .. Angle BCE = nC 8/81 : B E 3-12 :: R : tan BCE EC = 6inBCE 19o38';58-:R::BE3-12:EC Angle GE11 = DCK, fig. 1 GE = R : cot G Ell 24° 25' 14" :: GH or B C 8-781 BD •= A B 5-59 + 2 B B' 2 50=diamof extrado 8-09 x 3-1416-r 2 = BD Angle I1E1 = GE 19-337 :GIorBD 12-708 ::R : tanGEI =
. The Civil engineer and architect's journal, scientific and railway gazette. Architecture; Civil engineering; Science. 1S45.] THE CIVIL ENGINEER AND ARCHITECT'S JOURNAL. A B-Rad 2"9.'i x2 BC = AB r> J!ix3U16-r 2 A E = sinobl. GO'^50' : R:: AB5-59 : AE .. B E = K : cotan ohl. GO' 50' :: A B 559 : B E .. Angle BCE = nC 8/81 : B E 3-12 :: R : tan BCE EC = 6inBCE 19o38';58-:R::BE3-12:EC Angle GE11 = DCK, fig. 1 GE = R : cot G Ell 24° 25' 14" :: GH or B C 8-781 BD •= A B 5-59 + 2 B B' 2 50=diamof extrado 8-09 x 3-1416-r 2 = BD Angle I1E1 = GE 19-337 :GIorBD 12-708 ::R : tanGEI = 33 18 44", and G EI 33° 18' 44"-GEll 24° 25'14" = IIEI 59 781 401 -12 ' 38' 38" .318 ' 25' 14" -337 1-25 Tuisling Rules. ; the diff. of width R : tan II E I 8° 53' 30" :: the length 1-2 Distance apart on the inlrado .. Ditto on the extrado in the ratio of H E to E I Templates AC = 2-823 0-19 2-5 = 2-7 Teniplsle for checks of iotraclo. Template for checks of eilrado. B. A-^ Bi'ing niip of tlie divisions on the impost the template placed thereon, on A B and scored along B C. Point of tcccntricity on the centre line/or radiation of joints. Rad. 2-795 cotan obi. 60° 50' tan GEI 33° 18' 44"= l-025 = gs, fig. 4. The calculations to obtain the twist and eccentricity for the other arcs are performed in a similar manner. 2nd Rad. 5-927. Angle H EI = 4° 51' 23". r25 1-25 TwistiM/ Rules. \j2 H_ Eccentricity = Kr, fig. 4, l-SStS. 3rd Rad. ] 2-067. Angle H EI = 1" 54' 4J 1-25 Twisting Rules. Eccentricity = 6 g, fig. 4,3-337. 4lh Rad. 19-727. Angle H EI = 1° 5' 8". 1^25 1-25 Twistinq Rules. \n " ^ Eccentricity = m/), fig. 4, 5-243. 5th Rad. 31-219. Angle H E I = 0' 40' 11". 1-25 1-2 Tvisting Rules. \n Eccentricity = no, fig. 4, 8-166. Fig. 4. Elliptical arch on the skew, showing the direction of the face joints. AA' = sinohl. C0°50': R :: fig. 2 BS 1-25 ; A A' .. 1-431 Aa = fig. 1 A C '^joos = A / 16-032 and fig. 2 B 0 1
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