FP-96 English Version - Eastern Federal Lands Highway Division

52Section 109When emulsified asphalt is converted from volume to mass, use a factor of240 gallons per ton regardless of temperature.When asphalt cement for asphalt concrete pavement is stored in tanks devotedexclusively to the project, base quantities on invoices. When asphaltcement for asphalt concrete pavement is not stored in tanks devoted exclusivelyto the project, or when the validity of the quantity requested for paymentis in question, base quantities on the asphalt content determined byacceptance testing.109.03 Weighing Procedures and Devices. When material is proportionedor measured and paid for by mass, provide one of the following:(a) Commercial weighing system. Use permanently installed and certifiedcommercial scales.(b) Invoices. If bulk material is shipped by truck or rail and is not passedthrough a mixing plant, furnish a supplier's invoice with net mass or volumeconverted to mass. Periodic check-weighing may be required.(c) Project weighing system. Furnish, erect, and maintain acceptable automaticdigital scales. Provide scales that record mass at least to the nearest100 pounds. Maintain the scale accuracy to within 0.5 percent of the correctmass throughout the range of use.Do not use spring balances.Install and maintain platform scales with the platform level with rigid bulkheads at each end. Make the platform of sufficient length to permit simultaneousweighing of all axle loads of the hauling vehicle. Coupled vehiclesmay be weighed separately or together according to Section 2.20 paragraphUR 3.3 of NIST Handbook 44.Install and maintain belt-conveyor scales according to Section 2.21 of NISTHandbook 44.Before production on the project, after relocation, and at least once per year,have the weighing portion of the system checked and certified by the StateBureau of Weights and Measures or a private scale service certified by theBureau of Weights and Measures. Seal the system to prevent tampering orother adjustment after certification.