Elements of surveying and levelling; with descriptions of the instruments and the necessary tables (1870)
Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes & Company · leaf 229
to be 100 feet apart? A71S, From tangent, 2.5 ft.; from chord produced, 5 ft. 2. Eind offsets for a one-degree curve. Ans. Tangent, .87 ft.; chord, 1.74 ft. Another chain method, applicable to short curves. 41. Measure off, on the tangent,•any convenient distance, as Aa,and offset, at right angles… … GEC. m.] RAILWAY CURVES. 227 Then, by substituting for d in the formula, different dis-tances from A, the values of the corresponding offsets arefound. The formula is easily deduced. Foj, draw the radii Cv andCA, and vn parallel ,to the tangent Aa, Then, nAav is a rect-angle, and in the…
Surveying
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