BTS Bâtiment

Practice session

A site surveyor conducts a differential leveling run (nivellement direct) using an optical level. The reference benchmark A has an elevation of Z_A = 105.20 m. The backsight staff reading at A is L_arr = 1.45 m. The foresight staff reading to foundation point B is L_av = 2.10 m. What is the elevation (Z_B) of point B?

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