SA-202_Trench_Restoration_(1993).pdf

This engineering drawing from the City of Pittsburgh's Standards of Construction depicts detailed technical specifications for street pavement trench repaving details (Drawing No. SA-202), dated July 1, 1993. The document provides comprehensive technical diagrams and instructions for two types of street pavement repair methods: trench repaving for reinforced pavement (Type 2) and unreinforced pavement. The plans include precise schematics for total slab replacement on concrete streets, with detailed cross-sectional views showing excavation techniques, material specifications, and reconstruction methodologies.

The technical drawings specify critical construction parameters, including saw cut techniques, expansion joint requirements, concrete base specifications, and reinforcement guidelines. Specific notes emphasize excavation limitations, with instructions that the underlying method should not interfere with sub-surface drainage or existing utilities. The document includes an alternate detail section highlighting total slab replacement requirements, with precise measurements for trench width, concrete base depth, and material integration. The plans are formally approved by the City of Pittsburgh's engineering department, indicating these are official municipal infrastructure repair standards for street and pavement maintenance.