X 65 (RRF) ROLLING RESISTANCE FACTOR 2,164.50 or 2,165 (RR) STEP # 8 GRADE RESISTANCE / GRADE ASSISTANCE 33.30 (ST) X 20 X -2 = 1,332 (-GA) STEP #9 REQUIRED POUNDS OF PULL (RPP) TRAVEL SPEED MPH. 2,165 (RR) -1,332 (-GA) 833 (RPP) (ON SLIDE #94-99) j. STEP #10 Time: Is the time required to LOAD, HAUL, SPREAD, and RETURN. This is figured by adding Time (Fix-T) and Travel Time (TT) to get cycle time (CT). a. Fixed Time: is the time spent during an equipment cycle other than hauling and returning. This includes positioning, loading, unloading, turning, accelerating and decelerating all of which are fairly constant or fixed. Fixed times are determined from Table #6-2. To use Table 6-2, start with the gear you are hauling in. TABLE #6-2 FIXED TIME EQUIPMENT LOADING SCRAPER 1ST GEAR HAUL 2ND GEAR HAUL 3RD GEAR HAUL 4TH GEAR HAUL 5TH GEAR HAUL 6TH GEAR HAUL 7TH GEAR HAUL 8TH GEAR HAUL STRUCK HEAP STRUCK HEAP STRUCK HEAP SCRAPER LOADING ITSELF 2.5O N/A 2.8O N/A 3.O N/A 1155E 7.O 9.O 7.3O 9.3O 7.5O 9.5O TRAM 6.O 7.O 6.3O 7.3O 6.5O 7.5O ATC CLAMSHELL 16.O 19.O 16.3O 19.3O 16.5O 19.5O SCRAPER PUSH LOADED 1.43 1.71 1.73 2.01 1.93 2.21
effect for a production factor of 1.00. Material found in different states will effect dozer production as follows. TABLE # 11-3 SOIL CORRECTION FACTOR SOIL TYPE FACTOR LOOSE, STOCKPILE 1.2O HARD TO CUT (WITH TILT CYLINDER) HARD TO CUT (WITHOUT TILT CYLINDER) O.80 O.70 HARD TO DRIFT (STICKS TO BLADE) O.80 ROCK, RIPPED OR BLASTED O.60 EXAMPLE: Hard packed clay is Hard to drift (sticks to blade) = .80 (e) FACTOR #5: Determine Equipment / Operator Efficiency Correction Factor. TABLE #7-2 EQUIPMENT OPERATOR EFFICIENCY FACTOR TYPE UNIT OPERATOR DAY NIGHT tracked EXCELLENT AVERAGE POOR 1.OO .75 .60 0.75 .56 .45 NOTE: These factors include operator efficiency and visibility (dust, rain, snow, fog and darkness) with a job efficiency of a 60-minute hour.
SOIL CONVERTED FROM: BANK LOOSE COMPACTED SAND OR GRAVEL BANK LOOSE COMPACTED * .90 1.05 1.11 * 1.17 .95 .86 * LOAM BANK LOOSE COMPACTED * .80 1.11 1.25 * 1.39 .90 .72 * CLAY BANK LOOSE COMPACTED * .70 1.11 1.43 * 1.59 .90 .63 * ROCK (BLASTED) BANK LOOSE COMPACTED * .67 .77 1.50 * 1.15 1.30 .87 * CORAL COMPARABLE TO LIMESTONE BANK LOOSE COMPACTED * .67 .77 1.50 * 1.15 1.30 .87 * EXAMPLE: If your requirement is 4,500 compacted cubic yards and you are moving 228 loose cubic yards per hour, you must convert the loose cubic yards per hour to compacted cubic yards per hour. 152 x .63 = 95.76 or 95 ( C CYPH) X CON FACTOR (TABLE #1-1)= SOIL CONVERTED ( CYPH) ROUND DOWN (CYPH) (ON SLIDE #160) (4) STEP #3: Total Hours required: (a) Quantity to be moved divided by the hourly production rate multiplied by the number of dozers you have employed equals the total time in hours to complete the job. (b) The formula: Quantity to be ( CYPH) = THR Hr Production rate ( CYPH) X Number of dozers
Present the below example, reference the students to the power point and white board. Ensure this is explained step by step. example: EARTH LOAM DRY IS 2200 lbs. per cubic yard TABLE #2-2 APPROXIMATE WEIGHT OF SOIL SOIL CONVERTED FROM: BANK COMPACTED SAND OR GRAVEL BANK COMPACTED * .90 1.05 1.11 * 1.17 .95 .86 * LOAM BANK COMPACTED * .80 1.11 1.25 * 1.39 .90 .72 * CLAY BANK LOOSE COMPACTED * .70 1.11 1.43 * 1.59 .90 .63 * ROCK (BLASTED) BANK LOOSE COMPACTED * .67 .77 1.50 * 1.15 1.30 .87 * CORAL COMPARABLE TO LIMESTONE BANK LOOSE COMPACTED * .67 .77 1.50 * 1.15 1.30 .87 * (a) MOISTURE CONTENT Initial soil weight x moisture content = actual soil weight INSTRUCTOR DEMONSTRATION (5 min) Present the below example, reference the students to the power point and white board. Ensure this is explained step by step. EXAMPLE: 2200 LBS. WEIGHT OF DRY LOAM PER CY FROM TABLE 2-2 X 1.07 100% OF SOIL WEIGHT + 7% MOISTURE 2354 LBS. actual soil weight (ASW) (ON SLIDE # 211) (2) Step #2: CUBIC YARDS of A load: Remembering that you want to keep the weight of the load under 20,000 lbs, determine how many cubic yards can be hauled without exceeding 20,000 lbs. To do this, divide 20,000 by the listed soil weight per cubic yard.
8 NOTE: UP DAYS TO THE NEXT FULL DAY. (ON #225-229) INTERIM TRANSITION: Are any questions over the first eleven steps of dump truck estimations? Now let’s move into some practical application on these steps. INSTRUCTOR NOTE Introduce the following practical application (13). PRACTICAL APPLICATION (13). (2 HRS) Have the students complete the problems in the student handout. PRACTICE: There is one problem in the student handout for the students to complete. The problems are the first eleven steps of dump truck production. PROVIDE-HELP: Instructor will answer questions as they arise and assist students having difficulty. 1. Safety Brief: There are no safety concerns. 2. Supervision & Guidance: Instructors will walk around the classroom and answer questions as they may arise. Instructor may use the dry-erase board to wall through the problems. Upon completion instructors will progress to the next power point slide which contains the answers for the problems in the student handout. Clarify understanding of the material and answer any questions. 3. Debrief: Are any questions or comments concerning first eleven steps of dump truck production? Now we have continue with dump truck production estimations what have you learned? PROBLEM: A project requires you to a road using clay and gravel with an 8% moisture content. How many days are required, at 10 hours per day, to complete the project? Also, figure the
Weight of the soil, condition of the traveling surface, experience of the operator, to name a few. b. What is the loaded MAX speed? 35 MPH c. What is the empty MAX speed? 50 MPH – 10 Min) TRANSITION: Are there any questions over basic dump truck production? If not let’s move into logistical estimations. (ON SLIDE #232-233) 7. BY RANK: (1 HR 30 MIN) Before any logistical estimation can be done certain questions must be answered. Responsibilities for gaining this information and performing these tasks are broken down by rank. (ON SLIDE #234-237) a. Although are responsibilities by rank, everyone in the chain must know what the others are doing. The first check list is for the engineer officer. The list is as follows and is only a guide. This list may be added to or taken away from depending on the extent of the mission. More information on engineer planning can be found in FM-FM 4-4 Par 706. Engineer responsibilities are found in FM 5-35, page 18-11. CHECK LIST FOR THE ENGINEER OFFICER: START COMPLETE TASK CONDUCT SITE RECONNAISSANCE ORDER SURVEY
operation. Compute the water requirement for 50 vehicles. You will be working on a road that is 4,000' long and 28' wide from ditch to ditch. (ON #273) STEP #1 SOIL PREPARATION (NON POTABLE WATER): A: ESTIMATE THE SQ YD OF THE ROAD. 4,000'L X 28' W 9 = 12,444.44 OR 12,445 SQ.YD Up B: FORMULATE 12,445 SQ.YD. X 1 GAL X 1.10 WASTE = 13,689.50 OR 13,690 GAL (ON SLIDE #274) STEP #2 EQUIPMENT (NON POTABLE 50 VEHICLES X 1 GAL/DAY X 28 DAYS X 1.10 WASTE = 1,540 GAL (ON SLIDE #275) STEP #3 SHOWERS (POTABLE WATER): SHOWERS 250 MEN X 1.0 2) X 4 DAYS X 1.10 WASTE = 1,100 GAL STEP #4 LAUNDRY (POTABLE WATER): LAUNDRY 250 MEN X 2.1 (TABLE 2) X 4 DAYS X 1.10 WASTE = 2,310 GAL (ON SLIDE #276) STEP #5 PERSONNAL HYGEINE (POTABLE WATER) HYGEINE 250 MEN X 1.7(TABLE 2) X 28 DAYS X 1.10 WASTE = 13,090 GALS (ON SLIDE #277) STEP #5 DRINKING WATER (POTABLE WATER): 250 MEN X 3 GAL/MAN X 28 DAYS X 1.10 WASTE = 23,100 GAL