Answer Happy

FIELDWORK No. 6 PROFILE LEVELING HI IFS FS 0.557 1.353 2.458 2.221 3.105 2.131 2.358 1.424 1.588 0.898 3.455 2.626 1.323 0.898 0.566 1.231 2.353 1.357 3.264 2.565 2.356 1.259 1.110 2.369 3.122 IMPORTANT: DO NOT ROUND OFF DECIMALPLACES. STATION BS BM1 1.543 3+100 3+200 3+300 3+400 3+500 TP1 1.553 3+600 3+700 3+800 3+900 4+000 TP2 2.598 4+100 4+200 4+300 4+400 4+500 TP3 2.015 4+600 4+700 4+800 4+900 5+000 TP4 1.567 5+100 5+200 5+300 5+400 5+500 2.234 1.335 3.011 0.897 ELEVATION 181.525 M

B. PROCEDURE 1. PROFILE LEVELING a. Establish stakes at every full station along the center line of a proposed route at intervals of 10 meters. b. Set up and level the instrument in some convenient location where most number of stations are clear for sightings. c. Take and record a backsight on a rod held on a nearby benchmark to determine the height of instrument. d. Take and record Intermediate Foresights (IFS) from as many center line points up to within practical limits of sighting. e. When the rod has been advanced to a point beyond which further readings to ground points cannot be observed, establish a turning point (TP), and take a foresight on it to determine its elevation. f. Transfer and set-up the instrument in another farther position and take a backsight on the turning point just established. Then continue taking rod readings on ground points as before until the end of the roadway is reached. g. Tabulate observed and computed values accordingly. Refer to the accompanying sample format for the tabulation of field data. 0.030 2040 95/05 IPS 0-080 0-020 0+090 TP, 0-050 0-060 0-100 0-0000 0+010 BMO 0-070 LIPS

2. PLOTTING THE PROFILE a. Plot the observed and computed data (stationings and elevations of full and plus stations) on a cross-sectional paper having horizontal and vertical lines printed on it to represent distances both horizontally and vertically. b. Use convenient scale such as 1:100, 1:200, or 1:400 for plotting horizontal and vertical distances. c. Connect the plotted elevations for the profile by smooth curved line drawn freehand.

C. DATA AND RESULTS 1. OBSERVED AND COMPUTED DATA STATION BS HI IFS FS ELEVATION REMARKS

2. PROFILE ONS STATIONS

D. COMPUTATIONS Compute Heights of Instrument and Elevations. a. HI = ELEV + BS b. ELEV STATION = HI - IFS C. ELEVTP = HI - FS where: HI = height of instrument above a reference datum BS = backsight reading on the rod (or plus sights) FS = foresight reading on the rod (or minus sights) IFS=Intermediate Foresight Elev = elevation above a reference datum of a point sighted WRITE YOUR COMPLETE SOLUTION AFTER THIS LINE