Laserfiche WebLink
-= KEITH 'S RAILROAD CURVE' TABLES. <br />-lished by. KEUFFEL & ESSER CO., New York. <br />Entered according to Act of Congress in the year 1883' <br />y'Ilk , t• - f I by W: Keuflel & H. ,Esser,,.in the. office of the Librarian of Congress, <br />in Washingtoii, D.C. <br />r_ j <br />Copyright,' 1902, by Keuffel • & Esser. Co. i 7B I ? 1 <br />— - 2 ° <br />i. HOW TO USE KEITH'S ,TABLES. <br />- -- 71 <br />_ Wanted a Curve with- an Ext. of about 12 ft. Angle <br />a. +: of Intersection or I. P.=230 20' to the R. at Station, I <br />'642+72.,, :13 i <br />Ext. in Tab. IV-opposite 23°20'=120.87 a <br />(� f ,i • . 120.87-12=10.07. Say a'10* Curve. "- <br />1, Tan. in Tab. IV opp. 23'-20'=1183.1 3 y <br />1 6 Tab. V. correction for.;A. 23' 20' for a 10° Cur .=0.16 -^ <br />_ .--31-4-0.16=118.47=corrected Tangent. <br />r- (If corrected Ext. is required find. in same way) 33 <br />''> — ,Ang'. 23° 20'=23.33°-10=2.3333=L. C. <br />y _ 1 2° 19,}'=def.'for sta. 542 1. P; =sta. 642+72 <br />° <br />j'_ +50 Tan. = 1.18.47 <br />543 <br />-� 9 49z'- "� +50 <br />B. C.=sta: 541+53.53 <br />- - — -- L. C. = 2.33.33 <br />11.40'= �" '° 543+ L. <br />± . 86.86. E. C:=sta. 543+80.86, % �1 <br />! — ---- - -- �II 100-83m='4' 6.47x3'(def. for l ft. of 10° Cur. `=139.41'- <br />20 191"=def. for sta. 642. <br />Def. for 50 ft. =2' 30' for a 100 Curve. <br />Def. for 36.86 ft.-10 50i' for a 100 Curve <br />(These tables are published in held Books of <br />KF°FFRL & EssaR Co., Yew York, N. Y.) <br />I.P.Ang. 23°20• <br />.. __ 71 _ <br />•10°Curve. <br />LL& <br />>. _ <br />