Chicago : Engineering and Contracting Pub. Co. · leaf 642
ated meas-urements with a 100-ft. base line tape. Afterall corrections had been made and the positionof the end tacks established beyond question,the long tape was stretched out and supportedat the two ends of the base line. Each endof the tape was supported on a pair of lighttimber shears, guyed… … Fig. 6.—View Showing Viaduct Traveler, Municipal Bridge, St. Louis, Mo. 628 ENGINEERING & CONTRACTING Vol. XXXVI. No. 24, until the tape hung clear, and the spring bal-ance at the head end read approximately700 ft. The turnbuckles were then brought along the tape until a plumb-bob,…
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