SA-200_Brick_and_Blockstone_Streets_and_Concrete_Margin.pdf

This document is a City of Pittsburgh engineering standard construction drawing (DWG NO. SA-200) detailing specifications for brick and blockstone street reconstruction and reinforced cement concrete margin installation. The technical drawing provides a comprehensive cross-sectional and plan view of street reconstruction techniques, specifically outlining detailed requirements for pavement reconstruction, including specifications for leveling beds, subbase depth, concrete margins, and paving materials. The drawing includes nine detailed technical notes covering aspects such as leveling bed composition, brick placement, roadway grading, concrete base reinforcement, and margin measurement protocols.

The technical specifications indicate a standardized approach to street reconstruction with precise engineering requirements, including an 8-inch subbase depth, reinforced concrete base construction, and specific guidelines for adjacent roadway reconstruction. The drawing prescribes using a mix of sand and Portland cement for leveling beds, hand-placed bricks in running bond, and requires a 2% roadway cross slope for proper drainage. Concrete margin measurements are to be calculated in linear feet from curb to curb, with spacing requirements varying based on margin width (9" spacing for 24" margins, 6" spacing for 18" margins). The document appears to be part of the City of Pittsburgh's infrastructure improvement standards for street reconstruction projects.