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Com"" <br /> CURVE AND REDUCTION TABLES <br /> --- _ — lnblished by sugene Dietsgen Co. <br /> 1 <br /> 1 <br /> _ - 1. Radius R= 0 <br /> sin 2 <br /> / <br /> 2. Degree of Curve: D=1"00 L Also,sin D/2=v, <br /> ------ - -�-- - 3.'Tangent T=R tan I. Alan,T'= <br /> Tfar_i�+C <br /> ----- o- - 4. Length of Curve: L=100 D , <br /> Long Chord L.C.=2R sin%I. <br /> Middle Ordinate: M-R (1-cos %I) <br /> '7. External E=cosR I-R. Also, E=T tan L <br /> - a <br /> Z307 ATiON AND USE OF TABL98 <br /> I Given P.I.Sts.83+40.7,1-48*90'and D-6'30'find: <br /> T. T-T for�f'Curve <br /> C. From Tables V and VI <br /> - -- - cioe/e T- b'8+.197-368.32-3+68.39. Sta. P. C.-88+40,7-(3+68.32)m79+72,38. <br /> --- P.T.-P.C.+L,and L-100-U-100 863-697.38 Therefore.P,T.-(79+78.38) <br /> -- --- -- +(6+97.38)-88+68.76. . <br /> ��—T °nt ::: very (a�proamstely) ctify with D and with the <br /> -- - li square of the dietaaoe.Froin 1 abk IIY T7tngent GHeet�100 Tilt�b.{g9 fed.Dietsme <br /> -80-Sta.P.C. 27.62.Heneeofsetma.66X/2782�ti ft. <br /> - <br /> 27.62)! <br /> -90 <br /> square of any <br /> dicta ce,divided by twies the radius gUals((aPlno:hea r)the.db$W*o from tangent <br /> ---__-- --.-- — to curve.Thus(27.62) +(2x851.93)-.432 ft. <br /> - Desertions—Defieetion %D for loo ft.,3t D for 5o ft.,eto.For"X"ft.' <br /> Deflection Angle(in minutes)w 3 XX XD.For Sts.80 of above Queue De6eotion Angle <br /> - --- -.3 X27.62 X6.5-53.861.AlsoDedection Angle-dfl.for, ft.from Tsble III XX-1.95 <br /> --- _--- X 27.62-53.88. For Sts.181 Defies ion Angle-53.88'+��-4'4.861. <br /> &tsrnab—Frbm Table T? -1'outva,with eentnl gngb qt 45'20y,E-479.6. <br /> --- Tberefore,for 6'30'eurve,R—jew* } <br /> 6loneesioa lass T4b!•VI-1A7fi+.009 r7.417. <br /> F1 <br />