- 758 - SECTION 919 -- EQUIPMENT RENTAL
919.01 Description
1.The Contractor shall furnish, maintain, provide fuel, and operate equipment when the contract requires work on an "equipment rental" basis.
919.02 Equipment Requirements
1.Motorgraders shall be the self-propelled type, either tandem or all- wheel drive, equipped with pneumatic tires. They shall be equipped with a moldboard at least 12 feet (3.65 m) long with a suitable cutting edge, a scarifier with 9 or more teeth having minimum dimensions of 3 inches x 1 inch x 16 inches (75 mm x 25 mm x 400 mm), and power-operated controls. They shall be propelled by engines having a manufacturer's rating of at least 115 brake horsepower (85,755 brake watts).
2.Multiple-wheel, pneumatic-tired rollers shall be constructed so that they can be loaded to a gross weight of 200 pounds/inch (3.6 Kg/mm) of tire width. The internal pressure in the tires shall be at least 25 psi (172 kPa), and the tires on the front and rear axles shall be staggered so that they will cover the entire area over wh ich the roller travels.
3.Tamping or sheepsfoot rollers shall consist of a cylindrical metal roller, drum, or shell studded with tamping feet projecting not less than 7 inches (175 mm) from the su rface of the roller, drum, or shell. The tamping feet shall be spaced not less than 6 inch es (150 mm) or more than 10 inches (250 mm) measured diagonally center to center in any direction, and the face area of each shall be not less than 4 square inches (2,580 mm2) nor more than 12 square inches (7,740 mm2).
4.Wheel tractors shall be a farm or industrial type tractor equipped with pneumatic tires and capable of pulling the rollers and trailer type rotary tillers described herein. The tractors shall be propelled by engines having a manufacturer's rating of at least 46 belt horsepower (34,300 belt watts).
5.Crawler tractors and scrapers shall be crawler-type tractors and scrapers that are designed to operate as a unit. The crawler tractors shall be propelled by engines having a manufactur er's rating of at least 100 drawbar horsepower (74,570 drawbar watts). The scrapers shall be equipped with pneumatic tires and shall have a mi nimum struck capacity of 13.5 cubic yards (10.3 m3).
6.Tractors and scrapers shall be pneumatic-tired tractors and pneumatic-tired scrapers that are design ed to operate as a unit. The tractors shall be propelled with engines having a manufacturer's rating of at least 101 brake horsepower (75,300 drawbar watts). The scrapers shall have a minimum struck capacity of 6.5 (5 m3) cubic yards (10.3 m3).
7.Loading equipment shall be a uni t or units capable of excavating soil in its original position and loading the excavated material into dump trucks. The equipment shall be of such size and capacity that it can excavate and load at least 52 cubic yards (40 m3) of soil each hour.
8.Draglines shall be the full-revolving type with booms not less than 32 feet (9.8 m) long, a manufacturer's rated capacity of at least 3/4 cubic yard (0.6 m3), and a Power Crane Shovel Association rating of at least 15 tons (13.6 Mg). The bucket shall in no case be larger or smaller than that for which the machine is designed. Equipment Rental 919.04 - 759 - 9. Crawler tractors and bulldozers shall consist of crawler-type tractors and bulldozers, or angle-dozer s that are designed to operate as a unit. The crawler tractors shall be propelled by engines having a manufacturer's rating of at least 100 drawbar horsepower (74,570 drawbar watts).
10.Dump Trucks:
a.Dump trucks shall be standard make trucks having a manufacturer's rating of at least 2 tons (1.8 Mg). They shall be equipped with power-operated hoists and dump boxes of the end dump type having a volumetric struck capacity of at least 5 cubic yards (3.8 m3).
b.Dump trucks shall be properly licensed and shall not exceed the statutory limitations in dim ensions or wheel and axle loads.
c.Dump trucks shall have a ll applicable insurance coverage.
11.Side/End Dump Tractor Trailers: a. Truck Tractors and Dump Trailers shall be standard make trucks and trailers having a manufacturer's rating of at least 20 tons (18 Mg). They shall be equipped with power-operated hoists and dump boxes having a volumetric struck capacity of at least 25 cubic yards (19 m 3).
b.Dump Tractor/Trailers shall be properly licensed and shall not exceed the statutory limitations in dimensions or wheel and axle loads.
12.Rotary tillers shall be pulverizing and mixing units consisting essentially of a power-driven rotor fitt ed with tines or teeth. The rotor unit may be mounted on either a pneumatic-tired tractor or a trailer. Each unit shall include 2 rotor assemblies fitted with tines made of spring steel. One rotor shall be designed for pulverizing and the other for mixing. Each rotor shall have a minimum effective width of 6 feet (1.8 m). Sufficient power shall be provided to drive the rotor at efficient speeds for both pulverizing and mixing operations. Suitable devices shall be provided to allow easy and positive adjustment of t he depth of cut and the lowering and raising of the rotor to and from the cutting position.
13.Disc harrows shall be of the construction type with off-set discs having a diameter of not le ss than 22 inches (560 mm).
14.Skid loaders shall be loaders or tractors with a minimum operating lifting capacity of 1,100 pounds (500 Kg).
15.Crawler Mounted Hydraulic Excavators shall be crawler-type units capable of excavating soil in its orig inal position and loading the excavated material into dump trucks. The minimum operating weight shall be 13.2 tons (12 Mg).
919.03 Construction Methods
1.Equipment shall be operated within all manufacturer's operating parameters.
919.04 Method of Measurement
1.a. The hours of equipment rent al shall be measured as the time the equipment is required by the Engineer at the site, even though the actual operation of the equipment, at times, may be intermittent.
919.04 Equipment Rental
- 760 - b. The Engineer shall exclude from the measured time:
1.Time expended in moving to and from the work, other than necessary travel time within the project limits.
2.Time when no crew is available to operate the equipment. (3) Time expended in repairing and servicing the equipment. 2. Delivery of the equipment is measured by the each for each equipment item rented.
919.05 Basis of Payment
1.P a y I t e m P a y U n i t Rental of _____ Hour (h) Deliver _____ Each (ea)
2.The cost of all repairs, deprec iation, insurance, taxes, and other incidental costs, including all wage expense incurred for operators, forepersons, supervisors, and timekeepers, is subsidiary to equipment rentals.
3.Payment will be made to the C ontractor for delivery of equipment that is ordered as equipm ent rental in accordance wi th these Specifications when such equipment is not normally required in the performance of the other major items of work in the contract.
4.When the contract includes item s of equipment rental and does not include a corresponding item for delivery of the equipment, the furnishing, delivery, and operation of the equipment is subsidiary to the contract unit price for rental of that equipment.
5.Payment is full compensation for all work described in this Section. - 761 - SECTION 920 – DAMPPROOFING
920.01 Description
1.The Contractor shall furnish ma terials and dampproof surfaces as shown in the contract.
920.02 Material Requirements
1.Priming coat:
a.When coal-tar pitch is used in dampproofing, the creosote primer shall conform to t he requirements of ASTM D 43.
b.When asphalt is used in dampproofing, the asphaltic primer shall conform to the requirements of ASTM D 41.
2.Mopping coat:
a.Coal-tar pitch, when used as a mopping coat in dampproofing, shall conform to the requirements of ASTM D 450.
b.Asphalt, when used as a mopping coat in dampproofing, shall conform to the requirements of ASTM D 449, Type II.
3.Materials for damproofing shall be approved based on a certificate of compliance from the supplier stati ng that they conform to the above requirements.
920.03 Construction Methods
1.All surfaces to be dampproofed shall be free from dust, sand, mud, mortar, and other deleterious particles. All grease spots or marks of oil shall be removed by washing with a rag dipped in solvent. All surfaces shall be allowed to dry thoroughly before applying dampproofing. Work may be started as soon as the forms are removed.
2.After the surfaces have been t horoughly cleaned and dried, they shall be uniformly coated with 1 coat of primer and 2 coats of hot asphalt or coal-tar pitch. The primer may be appl ied cold, but the asphalt or coal-tar pitch shall be applied with a mop at a temperature of at least 250°F (121°C). Dampproofing shall be performed only in dry weather and when the temperature is above 41°F (5°C). Each coating shall be allowed to dry before the next coating is applied.
3.The primer shall be applied in quantities sufficient to thoroughly cover the surfaces to be treated. The total dampproofing application shall be not less than 6 gallons per 100 square feet (2.5 L/m2) of horizontal surface and 5 gallons per 100 square feet (2.25 L/m2) on vertical surfaces.
4.Care shall be exercised to confine all dampproofing materials to the areas being treated and to prevent disfi gurement of any part of the structure by dripping or spreading of asphalt.
920.04 Method of Measurement
1.The dampproofing will be measured in square yards (square meters).
Source: Nebraska Standard Specifications for Highway Construction, 2017 Edition. Pages 792–794 of 1,048.