SC-501b_-_Granite_Curb.pdf

This document is a technical drawing from the City of Pittsburgh's Standards of Construction, specifically detailing mill and bituminous overlay specifications for street pavement and granite curb installations. The detailed plan provides comprehensive engineering specifications for street reconstruction, focusing on Penn Avenue and including precise layering instructions for street pavement, including wearing course, binder course, tack coat, base course, and compacted sub-grade materials. The design specifies a 4" Class "AA" concrete base, 2A aggregate sub-base, and includes specific requirements for granite curb installation, with notes indicating the design is intended for central business district and north side neighborhoods.

The technical specifications include detailed engineering parameters such as hot mix bituminous requirements, wearing course composition (9.5mm, PG 76-22), and an ESAL (Equivalent Single Axle Load) design range of 3 to 30 million. The drawing provides precise measurements for various components, including a 3"x12"x12" granite strip, 4" mortar setting bed, and a 4" diameter perforated pipe for drainage. Additional notes specify milling operations to be conducted at a minimum of 4" for primary streets and 3" for secondary streets, with instructions to submit core samples to the DPW for guidance. The plan is part of a broader street renovation project in Pittsburgh, emphasizing infrastructure improvement and standardized construction techniques.