BASESPECS_20160203184036_104_X.pdf

This document is a detailed specification for precast concrete cattleguard foundations, referenced as drawing No. NV-02881-51. The specifications cover quality assurance requirements, material standards, construction methods, and acceptance criteria.

The technical requirements include using Portland cement Type II conforming to ASTM C 150, with ready-mixed concrete designed for 3,000 psi compressive strength at 28 days, containing 6 sacks of cement per cubic yard and 6% (±1%) entrained air. The foundations must use Grade 40 reinforcing steel and follow strict quality control measures, with potential rejection reasons including freezing within 3 days of placement, excessive honeycombing (over 25%), voids larger than 2 inches, and exposed reinforcing steel. The contractor must submit three copies of documentation for concrete and air-entraining admixture materials. The work requires inspection by the Contracting Officer with 24-hour notice before casting, specific curing procedures at 50°F for 7 days minimum, and foundations must reach 70% of design strength before transport. Payment is made per unit basis for each 146-inch wide cattleguard foundation.