Specifications include, but are not limited to: 3.1 Furnish and install one truck scale conversion kit and associated electronic controls for an existing concrete deck truck scale in a pit at Caja del Rio Landfill. 3.2 The scale shall be fully electronic and incorporate no mechanical weighing elements, check rods, and check stays. 3.3 The scale's weighing-related electronics shall consist solely of load cells, load cell cables, and a digital weight display. 3.4 The load cells and load cell mounting hardware shall be constructed of stainless steel. The cables shall be stainless steel sheathed. Load cells that are not stainless steel and hermetically sealed shall not be acceptable because of their inability to prevent moisture from entering the load cell and causing a premature failure. 3.5 The scale shall meet the requirements set forth by the current edition of the National Institute of Standards and Technology Handbook 44 (NIST HB-44). The scale manufacturer shall provide a Certificate of Conformance (NTEP Certification) to these standards upon request. TRUCK SCALE CONVERSION AND DIGTAL UPGRADE ITB No. 23/14/B Page | 18 3.6 The scale shall have a concentrated load capacity of 120,000 pounds. 3.7 The scale shall accept vehicles greater than 80,000 pounds per tandem axle. 3.8 The scale shall accept an average daily traffic volume of up to 250 vehicles per day, 365 days per year, for 20 years, assuming that 100% of the vehicles are loaded with the equivalent of 80,000 pounds on their dual tandem axle. 3.9 The scale shall be calibrated to a minimum of 120,000 pounds by 20-pound increments and not exceed 200,000 pounds. System configurations with increments greater than 20-pound increments will not be accepted.
