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TRUCKS THE MOST COMMON HAULING EQUIPMENT USED FOR MILITARY CONSTRUCTION SITE ARE 2 1/2, 5, AND 20 TON DUMP TRUCKS. THE HAUL CAPACITY CAN BE EXPRESSED IN THREE WAYS: BY THE LOAD IT WILL CARRY (IN TONS), BY THE TRUCKS VOLUME (IN LCY) OR ITS HEAPED CAPACITY (LCY). AS DIFFERENT MATERIALS HAVE DIFFERENT WEIGHTS PER CUBIC YARD YOU MUST ENSURE YOUR MATERIAL BEING HAULED DOES NOT EXCEED THE UNITS CAPACITY. UNDER NORMAL CONDITIONS YOUR FIVE TON DUMPS CAN HAUL 5 LCYS OF MATERIAL, AND YOUR 20 TON DUMPS HAUL 12 LCYS.

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**TRUCKS Distance is the principal factor in selecting haul units. Feet**

THE MOST COMMON HAULING EQUIPMENT USED FOR MILITARY CONSTRUCTION SITE ARE 2 1/2, 5, AND 20 TON DUMP TRUCKS. THE HAUL CAPACITY CAN BE EXPRESSED IN THREE WAYS: BY THE LOAD IT WILL CARRY (IN TONS), BY THE TRUCKS VOLUME (IN LCY) OR ITS HEAPED CAPACITY (LCY). AS DIFFERENT MATERIALS HAVE DIFFERENT WEIGHTS PER CUBIC YARD YOU MUST ENSURE YOUR MATERIAL BEING HAULED DOES NOT EXCEED THE UNITS CAPACITY. UNDER NORMAL CONDITIONS YOUR FIVE TON DUMPS CAN HAUL 5 LCYS OF MATERIAL, AND YOUR 20 TON DUMPS HAUL 12 LCYS. Feet

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**WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.**

Highway rear-dump

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**Tractor with bottom dump trailer**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**Bottom dump trailer deposits a wind row of material.**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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Articulated Trucks WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**Articulated Trucks Can operate over bad ground.**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**Articulated Trucks Retainer plate to increase load capacity.**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**Trucks to move the fleet**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**Special trailers for heavy loads**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.**

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**WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.**

Service truck

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**TIRES Tires are designed for a wide range of applications.**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION. Section 21 CAT Handbook

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They are BIG WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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Safety WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**TRUCK PRODUCTION LOAD HAUL RETURN DUMP A**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION. A DUMP

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**STEP 1 BUCKET LOADS Number of bucket loads required to fill the truck.**

WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP. Bucket loads must be an integer number.

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**MATCH THE LOADER TO THE TRUCK**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**MATCH THE LOADER TO THE TRUCK**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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TRUCK CAPACITY WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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TRUCK CAPACITY Manufacturer's specification sheets will list both struck and heaped capacities. WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION. STRUCK - material measured straight across the top of the body.

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**TRUCK CAPACITY - based on a 2:1 slope above hauler bodies. HEAPED 2 1**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION. - based on a 2:1 slope above hauler bodies.

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BUCKET CAPACITY WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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WEIGHT LIMIT Check load weight against gravimetric capacity of the haul unit. Max. gross weight 150,000 lb Operating weight (empty) 68,900 lb Therefore the max load is 81,100 lb WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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WEIGHT LIMIT Tires are about 35% of a truck’s operating cost. Overload a truck and you abuse the tires. WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**The Terex Titan, the world’s largest truck at 350-ton was designed around the tires.**

CAT is working on a 340-ton truck. WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**WEIGHT LIMIT Check load weight against gravimetric capacity**

Note the difference. Sideboards WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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WEIGHT LIMIT Check load weight against gravimetric capacity of the haul unit. WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**STEP 2 LOAD TIME LOAD TIME = Excavator cycle time**

X No. of bucket loads NEXT WE DETERMINE THE NUMBER OF LOADS OUR LOADER CAN PERFORM IN AN HOUR. TO FIND THIS, WE TAKE OUR OUTPUT DIVIDED BY OUR LOAD SIZE (WHAT OUR TRUCK CAN CARRY) TO GIVE US THE LOADS OF MATERIAL PER HOUR.

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STEP 2 LOAD TIME WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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STEP 3 HAUL TIME WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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STEP 4 RETURN TIME NEXT WE DETERMINE HOW LONG IT TAKES FOR OUR LOADER TO LOAD ONE HAUL UNIT. TAKE THE NUMBER OF MINUTES WE WORK AN HOUR (50) DIVIDED BY THE LOADS OF MATERIAL PER HOUR (25) TO GET AN AVERAGE LOADING TIME OF TWO MINUTES.

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**STEP 5 DUMP TIME This will depend on the type of hauling unit.**

Rear dumps must be spotted before dumping. Total dump time can exceed 2 minutes. WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 5 DUMP TIME Bottom dump units dump while moving.**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 5 DUMP TIME PROJECT SPECIFIC FACTORS**

Is the dump area smooth permitting safe maneuvering to dump. WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 5 DUMP TIME Is the dump area crowded with support equipment.**

PROJECT SPECIFIC FACTORS Is the dump area crowded with support equipment. WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 5 DUMP TIME Do loaded haul units have the right-of-away.**

PROJECT SPECIFIC FACTORS Do loaded haul units have the right-of-away. Grader Roller Water truck WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 5 DUMP TIME Turn and Dump times (min.) See p. 295**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION. See p. 295

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**STEP 6 TRUCK CYCLE TIME CYCLE TIME = Load Time + Haul Time + Dump Time**

+ Return Time WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 7 NUMBER OF TRUCKS REQUIRED**

TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS)

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**STEP 7 NUMBER OF TRUCKS REQUIRED**

Production TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS) Trucks

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**STEP 7 NUMBER OF TRUCKS REQUIRED**

Truck potential Loader potential Production Match point TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS) Trucks

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**STEP 7 NUMBER OF TRUCKS REQUIRED**

The match point typically does not coincide with an even number of trucks. TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS)

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**Three critical factors to consider: Bunching Operator **

STEP 8 EFFICIENCY Three critical factors to consider: Bunching Operator Equipment availability TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS)

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**STEP 8 EFFICIENCY Bunching:**

With a perfect loader - hauler match the effect of bunching is a 10 to 20% loss. If there are extra haulers the effect is reduced as there is always a line of trucks waiting to be loaded. TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS)

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**STEP 8 MISMATCH & BUNCHING EFFICIENCY**

Production TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS) Trucks

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**STEP 8 EFFICIENCY Operator:**

Longer hauling distances usually results in better operator efficiency. Operator efficiency increases as haul distance increases to about 8,000 ft. after which it remains constant. TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS)

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**STEP 8 OPERATOR EFFICIENCY**

Production TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS) Trucks

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**STEP 8 EFFICIENCY Equipment availability:**

When the loading tool breaks down, the production drops to zero. TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS)

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**STEP 9 PRODUCTION PRODUCTION (LOADER) =**

The Loader will control production if at least one extra truck is used. PRODUCTION (LOADER) = WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 9 PRODUCTION PRODUCTION (TRUCK) =**

Trucks control production if fewer trucks are used. PRODUCTION (TRUCK) = WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**TRUCK PRODUCTION PRACTICAL EXERCISE**

Ten 25 ton/18 cy rear dump trucks with low pressure tires are available to haul a rock dirt/gravel mixture. The wheel loader being used has a 4.25 cy bucket. WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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PRACTICAL EXERCISE The haul and return, over poorly maintained earth, is 3 miles. It is a down hill grade of 1.25% going to the dump area. Net truck weight is 36,860 lb. Working hour efficiency is 55 minutes. WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 1 BUCKET LOADS NUMBER OF BUCKET LOADS REQUIRED TO FILL THE TRUCK.**

Truck capacity = 18 cy Dirt/gravel mixture Fill Factor wheel loader (Table 8.6) %, use average 110% Loader bucket capacity = 4.25 X 1.1 = cy WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**STEP 1 BUCKET LOADS Bucket loads must be an integer No.**

NUMBER OF BUCKET LOADS REQUIRED TO FILL THE TRUCK. WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP. Bucket loads must be an integer No. Therefore use either 3 or 4 bucket loads.

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**STEP 1 BUCKET LOADS If 3 bucket loads: Truck volume = 3 X 4.675**

= 14 LCY If 4 bucket loads: Truck volume = 18 LCY and the excess spills off. WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**STEP 1 BUCKET LOADS 2,600 lb/LCY**

Check load weight against gravimetric capacity of truck. Dirt/gravel mixture Table 4.3 2,600 lb/LCY WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**STEP 1 CHECK LOAD WEIGHT 3 bucket load: 4 bucket load:**

WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**STEP 2 LOAD TIME (0.524 min) LOAD TIME = Bucket cycle time X**

No. of bucket loads 4.25 cy bucket Table 8.9 Bucket cycle time sec use average 31.5 sec (0.524 min) NEXT WE DETERMINE THE NUMBER OF LOADS OUR LOADER CAN PERFORM IN AN HOUR. TO FIND THIS, WE TAKE OUR OUTPUT DIVIDED BY OUR LOAD SIZE (WHAT OUR TRUCK CAN CARRY) TO GIVE US THE LOADS OF MATERIAL PER HOUR.

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**3 bucket load: 3 X 0.525 = 1.58 min. 4 bucket load:**

STEP 2 LOAD TIME 3 bucket load: 3 X = 1.58 min. 4 bucket load: 4 X = 2.10 min. WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**STEP 3 HAUL TIME Poorly maintained earth 1.25% GRADE DUMP**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION. DUMP Poorly maintained earth

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**STEP 3 HAUL TIME = 3.0% or 60 lb/ton Poorly Maintained Earth Haul Road**

Rolling resistance (Table 5.1) lb/ton, use 85 lb/ton or 4.25% Grade resistance load to dump: -1.25% Total Resistance = (-1.25%) = 3.0% or 60 lb/ton WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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STEP 3 HAUL TIME Net truck weight 36,860 lb or tons 3 bucket load tons Gross wt. = = 36.63 tons WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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STEP 3 HAUL TIME Net truck weight 36,860 lb or tons 4 bucket load tons Gross wt. = = 41.83 tons WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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**STEP 3 HAUL TIME 3 bucket load Gross wt. 36.63 ton**

Rimpull = 60 lb/ton X ton = 2,200 lb 4 bucket load Gross wt ton Rimpull = 60 lb/ton X ton = 2,510 lb WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP.

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Page 294 text WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP. 2510 2200

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**STEP 3 HAUL TIME 3 bucket, 5.143 min 4 bucket, 8.183 min**

3 bucket load 35 mph 4 bucket load 22 mph WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION. 3 bucket, min 4 bucket, min

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**STEP 4 RETURN TIME Net truck weight 36,860 lb or 18.43 tons**

NEXT WE DETERMINE HOW LONG IT TAKES FOR OUR LOADER TO LOAD ONE HAUL UNIT. TAKE THE NUMBER OF MINUTES WE WORK AN HOUR (50) DIVIDED BY THE LOADS OF MATERIAL PER HOUR (25) TO GET AN AVERAGE LOADING TIME OF TWO MINUTES.

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**STEP 4 RETURN TIME Rimpull = 110 lb/ton X 18.43 ton = 2,030 lb**

Poorly Maintained Earth Haul Road Rolling resistance, 4.25% Grade resistance load to dump 1.25% Total Resistance = % = 5.5% or 110 lb/ton Rimpull = 110 lb/ton X ton = 2,030 lb WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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Page 294 text WE FIRST IDENTIFY THE LOADERS OUT PUT IN LCY/HR. NEXT WE DETERMINE THE AMOUNT OF MATERIAL OUR HAUL UNIT CAN CARRY BASED ON ITS WEIGHT CAPACITY AND THE WEIGHT OF MATERIAL WE ARE HAULING. FOR OUR SITUATION WE HAVE DETERMINED OUR M 817 SERIES FIVE TON CAN TRANSPORT 5 LCYS PER TRIP. 2030

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**STEP 3 RETURN TIME = 5.143 min Return speed 35 mph**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION. = min

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**Use 2.0 minutes STEP 5 DUMP TIME**

Rear Dump Trucks must be spotted before dumping, Total dump time averages about 2 minutes. Use 2.0 minutes WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 6 TRUCK CYCLE TIME Load time 1.580 min + Haul time 5.143 min**

3 bucket loads Load time min + Haul time min + Dump time min + Return time min CYCLE TIME = min WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 6 TRUCK CYCLE TIME Load time 2.100 min + Haul time 8.183 min**

4 bucket loads Load time min + Haul time min + Dump time min + Return time min CYCLE TIME = min WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 7 TRUCKS REQUIRED 3 bucket loads**

TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS) Must be an integer number therefore 10 trucks

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**STEP 7 TRUCKS REQUIRED 4 bucket loads**

TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS) Must be an integer number therefore 10 trucks

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**Working hour efficiency is 55 minutes. STEP 8 EFFICIENCY**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 9 PRODUCTION 3 bucket loads**

The loader will control production if at least one extra truck is used. PRODUCTION (LOADER) = WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 9 PRODUCTION 4 bucket loads**

The loader will control production if at least one extra truck is used. PRODUCTION (LOADER) = WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 9 PRODUCTION 3 bucket loads 10 trucks 488 LCY/hr**

WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 9 PRODUCTION 3 bucket loads PRODUCTION (TRUCK) =**

If only 8 trucks are AVAILABLE the trucks control production. PRODUCTION (TRUCK) = WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 9 PRODUCTION 4 bucket loads PRODUCTION (TRUCK) =**

If only 8 trucks are AVAILABLE the trucks control production. PRODUCTION (TRUCK) = WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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STEP 9 PRODUCTION WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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STEP 9 PRODUCTION While matching the fleet to the required production is important, doing it at a minimum $/unit of material moved is usually the goal. WE WILL NOW DETERMINE THE PRODUCTION RATE FOR A HAUL UNIT BASED ON THIS SITUATION.

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**STEP 9 PRODUCTION COST Cost/ ton $ As you add trucks Tons/ hour**

TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS) Tons/ hour

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**STEP 9 PRODUCTION COST Cost/ ton $ Different size trucks Tons/ hour**

TO DETERMINE THE NUMBER OF HAUL UNITS NEEDED TO SUPPORT THE LOADERS OUT PUT WE DIVIDE OUR HAULING UNIT TRAVEL CYCLE TIME (FROM STOCKPILE TO DUMP AREA AND RETURN) BY OUR LOADING TIME TO GET HAUL UNITS REQUIRED, TO THIS NUMBER WE ADD 1 AS A BACK UP FOR ANY MAINTENANCE PROBLEMS THAT FREQUENTLY OCCUR. 1 LOAD = 1 HAUL NOTE: AT THIS TIME HAVE STUDENTS PERFORM PRACTICAL EXERCISE FOR DUMP TRUCK WITH SECOND SITUATION ALLOW 5 MINUTES FOR P.E. (NEXT SLIDE HAS SOLUTIONS) Tons/ hour

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THE MOST COMMON HAULING EQUIPMENT USED FOR MILITARY CONSTRUCTION SITE ARE 2 1/2, 5, AND 20 TON DUMP TRUCKS. THE HAUL CAPACITY CAN BE EXPRESSED IN THREE WAYS: BY THE LOAD IT WILL CARRY (IN TONS), BY THE TRUCKS VOLUME (IN LCY) OR ITS HEAPED CAPACITY (LCY). AS DIFFERENT MATERIALS HAVE DIFFERENT WEIGHTS PER CUBIC YARD YOU MUST ENSURE YOUR MATERIAL BEING HAULED DOES NOT EXCEED THE UNITS CAPACITY. UNDER NORMAL CONDITIONS YOUR FIVE TON DUMPS CAN HAUL 5 LCYS OF MATERIAL, AND YOUR 20 TON DUMPS HAUL 12 LCYS. HAPPY HAULING

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