FB404 - Laserfiche WebLink

Home Browse Search

0 OR DIRECTIONS FOR USE OF TABLES i TABLE No. 1. Distance of slope stake from side or shoulder stake for any width roadway, slope l Y:22 to I. If ground is nearly level, the cut or fill at side stale left of t is located by the double entry method i*n column and top row. The number i.n body able i*n same row and column dive from side stake to slope stake. If I eveZ estimate the difference in elei the side A amount if ake and slope stake, I cue, elevate i*f fi to cut or fill and find distance rod at this point, and line o target. IE it does not necessary. s distance ground is not ition between ower target by this Add this amount in table. Set up f sight should cut make the slight adjustment TABLE No. 9. To find Tangent and External for curve of by degree of curve and any other degree, dvev;ride 40 add correction found in column Degree of curve with a given I by dividing tangent, (or external), given tangent, (or external)*' t 1 of corrections. maybe found opposite I by The distance from a point on the tangent to he curve is very nearly the square of the tangent ength divided by twice the radius. is r TABLE II TRIG011vTO:VIETRIC FOItb1UL1Eo /,A= ZMOP ZB = ZPON = ZOPL R = 0 B MEMEMEM" c 1 sinA= � = i= a= cos ]3=LP cos A= � = b b=sing=OL tan A= � _ 0 MQ MQMQ= cotB=MQ NT NT cot = ON — 1—NT=tanB=NT secA0= Q = OQ=OQ=cscB=O0Q OT OT cscA= ON 1=UT= see B=UT vers A = LM = LM = covers B # OP — LP covers A = OP = OP — LP = vera B exsec A = PQ = coexsec DI coexsec A = PT = exsec B = � 1— Los A cos � A � 1 +Cos A sin � A 2 �I 2 sin 2A = 2 sin A cos A cos 2 A = cos' A —sin' A Law of Lines gin A _ sin B _ sin C' a B C Law of Cosines e' = a' +b2 —2 ab cos C Law of Tangents a+b _ tan % (A -I-B) a—b tan % (A — B)