00190.00 122 Section 00190 - Measurement of Pay Quantities Description
00190.00 Scope - The Engineer wi ll measure pay quantities for accepted Work according to the
United States standard measure unless otherwise provided in the Contract. Unless otherwise specified in the Contract, the Engineer will round off all quantity computations using the following convention: • The final significant digit will not be changed when the succeeding digit is less than 5. • The final significant digit will be increased by one when the succeeding digit is 5 or greater. The measurement provisions contained in the Specifications for each Pay Item will supplement or modify the above convention by: • Imposing measurement limitations • Describing measurement or computation procedures • Giving conversion factors or adjustment conditions • Providing for determination of reasonably accurate and representative Pay Item quantities Measurements required or allowed to be made by the Contractor will be subject to the Engineer's verification. The Engineer's decision about measurement is final.
00190.10 Measurement Guidelines - Measurement of quantities will be made on the following
bases, unless otherwise specified in the Contract :
a.Unit Basis - Unit will be each, unless otherwise specified in the Contract and will be determined by actual count of units in place.
b.Length Basis - Length will be feet or mile, unless otherwise specified in the Contract and will be determined by measuring the length at least to the nearest 0.1 foot or at least to the nearest 0.1 mile, as applicable, unless otherwise specified in the Contract. Measurements will be limited to the dimensions shown or specified, or as directed by the Engineer.
c.Area Basis - Area will be square foot, square yard, or acre, unless otherwise specified in the Contract and will be determined by measuring the width and the length (or height) at least to the nearest 0.1 foot and computed at least to the nearest 0.1 square foot, nearest 0. 1 square yard, or nearest 0.1 acre, as applicable, unless otherwise specified in the Contract.
d.Weight Basis - Weight will be pound or T on, unless otherwise specified in the Contract and will be determi ned as follows:
1.Pou nd - Pound weight will be determined by the net weight identified on the manufacturer's package d labels, subject to periodic check weighing. Weight by pound will be measured at least to the nearest 1.0 pound unless otherwise speci fied in the Contract. Provide a certificate with each shipment together with a certified copy of the weight of each delivery. If the check weight is less than the manufacturer weight by more than 0.4%, the discrepancy will be resolved by the Engineer.
2.Ton - Ton weight will be determined on Contractor -provided scales as required under 00190.20 unless otherwise allowed by the Specifications. Weight by T on will be measured at least to the nearest 0.01 Ton unless otherwise specified in the Contract. 00190.10 123 If bituminous materials, portland cement, lime, and similar bulk Materials are shipped by truck or rail, the Supplier's shipping invoice with net scale weights, or volumes converted to weights, may be used for Pay Item quantity determination in place of weights determined on the Contractor - provided vehicle scales. Shipping invoice weights of the Supplier's truck or transport shall be subject to periodic check weighing on the Contractor's vehicle scales, or other scales designated, according to 00190.20. If the check weight is less than the Supplier weight by more than 0.4%, the discrepancy will be resolved by the Engineer. No payment will be made: • For quantities in excess of the Supplier weight • When Materials have been lost, wasted, or otherwise not incorporated into the Work • For additional hauling costs resulting from the check weighing
e.Volume Basis - Volume will be cubic yard truck measure or in-place measure, gallons, foot board measure (FBM) , or thousand foot board measure (MFBM), unless otherwise specified in the Contract and will be measured at least to the nearest 0.1 cubic yard, nearest 1.0 gallon, nearest 0.1 FBM, or nearest 0.1 MFBM, as applicable, unless otherwise specified in the Contract. Truck measure w ill be the measured and calculated maximum "water level" capacity of the vehicle. Quantities will be determined at the point of delivery, with no allowance for settlement of Material during transit. When required to facilitate measurement, the vehicle load shall be leveled at the point of delivery. Payment will not be made for Material in excess of the maximum "water level" capacity. Deductions will be made for loads below the maximum "water level" capacity. When bituminous materials are measured by vol ume, the volume will be measured at 60 °F or will be corrected to the volume at 60 °F using the correction factors found in the MFTP (ODOT TM 321).
f.Time Basis - Time will be hour, Day, or year, unless otherwise specified in the Contract, and will be measured to at least the nearest 0.5 hour, nearest 1.0 Day, or nearest 1.0 year, as applicable, unless otherwise specified in the Contract.
g.Standard Manufactured Items - If standard manufactured items, such as fence, wire, plates, rolled shapes, pipe, conduit and other similar items are specified in the Contract by properties such as gauge, unit weight, or section dimensions, the manufacturing tolerances established by the industry involved will be accepted unless more stringent tolerances are cited i n the Contract.
h.Lump Sum Basis - Lump sum, when used, means the Work described shall be completed and accepted without measurement unless changes are ordered in writing by the Engineer. If estimated quantities of the Work to be performed are listed in the Special Provisions, they provide only a basis for adjusting payment amounts. Estimated quantities are approximate only, and are made from a reasonable interpretation of the Contract Documents. Computations based on the details and dimensions show n on the Contract Documents are not guaranteed to equal estimated quantities. If the Agency issues no Change Order, the Agency will make no pay adjustment for quantities based on the Contractor's computations that overrun or underrun the estimated quantit ies. If the Agency issues Change Orders for changes in the Work, the Engineer will measure such changes according to the standards set by 00195.20 to determine adjustment of payment. 00190.20 124 00190.20 Contractor to Provide Vehicle Weigh Scales:
a.General - If the Specifications require measurement by weighing on vehicle weigh scales, the Contractor shall prov ide vehicle weigh scales and shall transport Materials to the scales. Subject to the Engineer's approval, weights may be determined by plant or hopper scales according to 00190.30. Contractor -provided scales shall be furnished, installed and maintained b y the Contractor or its Supplier, or, subject to the Engineer's approval, may be commercial scales located in the vicinity of the Project. Unless otherwise provided in the Contract, Pay Items to be measured by weight shall include all Contractor costs for providing, maintaining, inspecting, and testing scales; for furnishing appropriate weigh tickets; for self -printing scales; for electronic weigh memo system(s); and for transporting Materials to the scales or to check weighing.
b.Requirements - The sc ales shall conform to ORS Chapter 618, or the laws of the state in which they are located, and NIST Handbook 44, and shall be: • Licensed by the Oregon Department of Agriculture, or by the analogous regulatory body for scales located outside the State; • Tech nically suitable for weighing the Materials; • Properly installed and maintained; and • Accurate to the required tolerances. The weight of any Materials weighed by anyone other than the Engineer will be subject to check weighing as the Engineer directs.
c.Approaches - Vehicle scale approaches shall be: • At each end of the scale platform; • Straight and in line with the platform; and • Long enough to accommodate combination vehicles longer than the scale platform so that they are level and allow release of brak es before weighing.
d.Inspections - Contractor shall have all scales certified, that is inspected and their accuracy tested, by the Oregon Department of Agriculture, an analogous regulatory body for scales located outside the State, or a scale service company , as follows: • Before use if installed at a new site; • 60 Calendar Days after initial inspection; As otherwise required by the Oregon Department of Agriculture, or an analogous regulatory body for scales located outside the State; and • When the Engineer directs additional inspections. No Materials weighed on scales without current certifications according to this Subsection will be accepted. The Contractor shall provide a copy of all required certifications to the Engineer. Testing by a scale service company within the State of Oregon shall comply with ORS Chapter 618. If additional inspections directed by the Engineer confirm that the scale accuracy is within the required tolerances, the Agency will pay the cost for inspecting and testing the scales. If the scale 00190.20 125 accuracy is not within these tolerances, the Contractor shall pay the cost for inspecting and testing the scales.
e.Inspection Results - If an inspection indicates the scales have been under -weighing (indicating less tha n the true weight), the Agency will make no additional payment to the Contractor for Materials previously weighed. If an inspection indicates the scales have been over -weighing (indicating more than the true weight), the weights will be reduced for Materi als received after the time the Engineer determines the overweighing began or, if that is not possible, after the last acceptable certification of the scales. The reduction will be the amount of error in excess of the 0.2% maintenance tolerance allowed in the Contract.
f.Contractor -Provided Weigh Technician - The Contractor shall provide a technician to operate Contractor -provided vehicle weigh scales. The Agency may observe procedures and require check weighing according to the following:
1.Scale with Automatic Printer - If the scales have an automatic weigh memo printer or an approved electronic weigh memo system that does not require manual entry of gross weight information, the Agency may periodically have a repre sentative at the scales to observe the weighing procedures. In addition, the Engineer may periodically check the weight for a load of Materials by directing the haul vehicle to reweigh on a different scale that has been inspected and certified according t o 00190.20(b) and 00190.20(d). If a different scale is not available within a 30 -mile round trip from the regular haul route, the Agency will allow check weighing on an approved alternate basis. Check weights within 0.4% of the Contractor -provided weight are acceptable. The Engineer will resolve discrepancies found by check weighing. Agency employee costs will be paid by the Agency. The Contractor shall pay all other costs resulting from the check weighings, including, without limitation , the use of ot her scales. When 2,000 Tons or less of all types of Materials are received from a scale, check weighing will be at the discretion of the Engineer. The Contractor shall make at least one check weighing on projects where more than 2,000 Tons of all types of Materials are received from a scale. If more than 50 Tons per Day of all types of Materials are received from a scale, the Contractor shall make random check weighings at least once every ten Days on which more than 50 Tons is received or at each interval that 10,000 Tons has been weighed, whichever occurs first, or as directed by the Engineer. The check weighing frequency does not apply to total quantities less than 2,000 Tons of all types of Materials from a scale. The Contractor shall provide the Engineer with the results of the check weighing.
2.Scale Without Automatic Printer - The Contractor shall inform the Engineer of their intent to use a scale without an automatic printer at least 3 working days before weighing begins or before the Contractor changes to a scale that does not have an automatic printer. If a different scale is not available within a 30-mile round trip from the regular haul route, the Agency will allow check weighing on an approved alternate basis. Check weights within 0.4% of the Contractor-provided weight are acceptable. The Engineer will resolve discrepancies found by check weighing. Agency employee costs for check weighings will be paid by the Agency. The Contractor shall pay all other costs resulting from the check weighings, including, without limitation, the use of other scales. 00190.20 If more than 50 Tons per Day of all types of Materials are received from a scale, the Contractor shall make random check weighings at least every tenth Day on which more than 50 Tons is received or at each interval that 10,000 Tons has been weighed, whichever occurs first, or as directed by the Engineer. The Contractor shall make at least one check weighing on all projects where Materials are received from a scale without an automatic printer. The Contractor shall provide the Engineer with the results of the check weighing.
3.Duties of Weigh Technician - The Contractor's weigh technician shall: • Determine twice a Day, or as otherwise directed by the Engineer, the empty haul weights (tare weights) of hauling vehicles, unless vehicles are tared before each load; • Furnish daily a listing of the tare weights if 10 or more loads are hauled during that Day; • Furnish a note listing the net weight for each consecutive ten loads with the following load; • Furnish a daily listing of the net weights and total weight for each type of Material hauled during that Day; and • Furnish a legible, serially numbered weigh memo for each load of Materials to the Agency's Materials receiver at the point of delivery, or as directed by the Engineer. The memo shall identify the Project, the Materials, the date, net weight (gross and tare as appropriate), and identification of the vehicle and weigh technician. If approved by the Engineer an electronic weigh memo system may be used. Requests to use an electronic weigh memo system shall be submitted to the Engineer according to 00150.37, providing sufficient detail for the Engineer to perform an evaluation. If approved, the Contractor shall provide training, technical support, reports, and weigh memo information to the Engineer at no additional cost to the Agency. The electronic weigh memo system shall be: • Capable of recording and securely retaining the same required “weigh memo” information identified above. For retention see 00170.07(c). • Fully integrated with the provided weigh scale system. • Designed in such a way that the data electronically read from scales cannot be altered by the Contractor, Subcontractor, Supplier, Engineer, or other system users. • Designed to allow the Engineer remote access to all the weigh memo data in real-time and allow the Engineer to add comments to the individual weigh memo regarding waste, temperature, stations, yield or other information. The system shall identify the system user or individual that adds comments to the electronic weigh memo or otherwise accesses the system. The Contractor shall provide the Engineer a means to access the data if the Engineer cannot use an Agency provided hand held device for access. • Capable of providing all the weigh memo information, including any added comments, in an electronic data file the Engineer can easily access without proprietary software.
g.Agency-Provided Weigh Technician - If the Contractor provides vehicle weigh scales without a weigh technician meeting the requirements of this Subsection, the Agency will provide a weigh technician at the Contractor's expense. The hourly cost for the weigh technician will be as stated in the Special Provisions. The Contractor shall provide a weighhouse for the weigh technician as specified in the Special Provisions. The Agency's weigh technician will: • Determine tare weights; • Prepare weigh memos for each load; • Compile the weigh records; and • Not participate in the production of Materials or the loading of haul vehicles. 00190.30
00190.30 Plant Scales - The Contractor, with the Engineer's written approval, may weigh
plant-mixed Materials on scales that have either: • An automatic weight batching and mixing control printer system; or • A weigh hopper printer system. If approved by the Engineer, an electronic weigh memo system may be used in place of a printer system. See 00190.20(f)(3). Any additional costs resulting from the use of these scales shall be borne by the Contractor. Check weighing will be done according to 00190.20(f). Except for 00190.20(c) regarding approaches, the Contractor's use of plant scales shall comply with all provisions of 00190.20. The Engineer's approval for the Contractor's use of plant scales to determine pay weights will be rescinded if check weighing or scale inspections indicate the scales do not consistently determine weights within the tolerances allowed by state law. 00195.00
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Source: Oregon Standard Specifications for Construction, 2024 Edition. Pages 188–193 of 1,268. View official source ↗