General Requirements R0154 Construction Aids Reference …

1 General RequirementsR0154 Construction AidsR015433-10 Contractor EquipmentRental Ratesshown elsewhere in the book pertain to late model highquality machines in excellent working condition, rented from equipmentdealers. Rental rates from contractors may be substantially lower than therental rates from equipment dealers depending upon economic conditions;for older, less productive machines, reduce rates by a maximum of 15%. Anyovertime must be added to the base rates. For shift work, rates are rule of thumb is 150% of one shift rate for two shifts; 200% for periods of less than one week, operated equipment is usually moreeconomical to rent than renting bare equipment and hiring an to move equipment to a job site (mobilization) or from a job site(demobilization) are not included in rental rates, nor in any Equipment costson any Unit Price line items or crew listings.

2 These costs can be foundelsewhere. If a piece of equipment is already at a job site, it is not appropriateto utilize mob/demob costs in an estimate rates vary throughout the country with larger cities generally havinglower rates. Lease plans for new equipment are available for periods inexcess of six months with a percentage of payments applying rates can also be treated as reimbursement costs for contractor-ownedequipment. Owned equipment costs include depreciation, loan payments,interest, taxes, insurance, storage, and major rental rates vary from 2% to 5% of the cost of the equipmentdepending on the anticipated life of the equipment and its wearing rates are about 1/3 the monthly rates and daily rental rates about 1/3the weekly hourly operating costs for each piece of equipment include costs to theuser such as fuel, oil, lubrication, normal expendables for the equipment,and a percentage of mechanic s wages chargeable to maintenance.

3 The hourlyoperating costs listed do not include the operator s daily cost for equipment used in the standard crews is figured by dividingthe weekly rate by five, then adding eight times the hourly operating costto give the total daily equipment cost, not including the operator. This figureis in the right hand column of the Equipment listings under Drivingrates shown for pile hammer and extractor do not includeleads, crane, boiler or compressor. Vibratory pile driving requires an addedfield specialist during set-up and pile driving operation for the electricmodel.

4 The hydraulic model requires a field specialist for set-up only. Up to125 reuses of sheet piling are possible using vibratory drivers. For normalconditions, crane capacity for hammer type and size are as Type and SizeCapacityAir or SteamDieselVibratory25 tonto 8,750 ton15,000 32,000 ton25,000 ton112,000 be specified for the job by size, building and sitecharacteristics, availability, performance characteristics, and duration of & Shovelsrent for about the same as equivalent size cranes butmaintenance and operating expense is higher. Crane operators rate mustbe adjusted for high boom heights.

5 Average adjustments: for 150 boom add2% per hour; over 185 , add 4% per hour; over 210 , add 6% per hour;over 250 , add 8% per hour and over 295 , add 12% per Cranesof the climbing or static type have jibs from 50 to 200 andcapacities at maximum reach range from 4,000 to 14,000 pounds. Liftingcapacities increase up to maximum load as the hook radius rental rates, based on purchase price are about 2% to 3% per and dismantling runs between 500 and 2000 labor hours. Climbingoperation takes 10 labor hours per 20 climb. Crane dead time is about 5hours per 40 climb.

6 If crane is bolted to side of the building add cost ofties and extra mast sections. Climbing cranes have from 80 to 180 of mastwhile static cranes have 80 to 800 of Cranescan be converted to tower cranes by using tower heights over 400 have been single 100 high materialHoist and Towercan be erected and dismantledin about 400 labor hours; a double 100 high hoist and tower in about600 labor hours. Erection times for additional heights are 3 and 4 labor hoursper vertical foot respectively up to 150 , and 4 to 5 labor hours per verticalfoot over 150 high. A 40 high portable Buck hoist takes about 160 laborhours to erect and dismantle.

7 Additional heights take 2 labor hours pervertical foot to 80 and 3 labor hours per vertical foot for the next 100 . Mostmaterial hoists do not meet local code Requirements for carrying 150 highPersonnel Hoistrequires about 500 to 800 labor hours toerect and dismantle. Budget erection time at 5 labor hours per vertical footfor all trades. Local code Requirements or labor scarcity requiring overtimecan add up to 50% to any of the above erection Equipment: The selection of earthmoving equipmentdepends upon the type and quantity of material, moisture content, hauldistance, haul road, time available, and equipment available.

8 Short haul cutand fill operations may require dozers only, while another operation mayrequire excavators, a fleet of trucks, and spreading and compactionequipment. Stockpiled material and granular material are easily excavatedwith front end loaders. Scrapers are most economically used with haulsbetween 300 and 1-1/2 miles if adequate haul roads can be are often used for blasted rock and any material where a vertical faceof 8 or more can be excavated. Special conditions may dictate the use ofdraglines, clamshells, or backhoes. Spreading and compaction equipmentmust be matched to the soil characteristics, the compaction required and therate the fill is being Heavy LiftingHydraulic Climbing JacksThe use of hydraulic heavy lift systems is an alternative to conventional typecrane equipment.

9 The lifting, lowering, pushing, or pulling mechanism isa hydraulic climbing jack moving on a square steel jackrod from 1-5/8 to 4 square, or a steel cable. The jackrod or cable can be vertical or horizontal,stationary or movable, depending on the individual application. Whenthe jackrod is stationary, the climbing jack will climb the rod and push orpull the load along with itself. When the climbing jack is stationary, thejackrod is movable with the load attached to the end and the climbing jackwill lift or lower the jackrod with the attached load. The heavy lift systemis normally operated by a single control lever located at the hydraulic system is flexible in that one or more climbing jacks can be appliedwherever a load support point is required, and the rate of lift benefits have been demonstrated on projects such as: erectionof ground assembled roofs and floors, complete bridge spans, girders andtrusses, towers, chimney liners and steel vessels, storage tanks, and heavymachinery.

10 Other uses are raising and lowering offshore work platforms,caissons, tunnel sections and Tables