UNSPSC 30131500: Blocks

UNSPSC 30131500 Blocks, a Class code, covers the supply and installation of modular retaining wall units, concrete masonry blocks, and related block-based structural systems in state and local construction projects. Recent solicitations show state and local governments buying modular block retaining walls for infrastructure and drainage improvements, concrete blocks and pavers for sidewalks and curb work, and related materials for site stabilization and ADA-compliant pedestrian access. Issuing bodies include city departments of mobility and infrastructure, county transportation agencies, school districts undertaking building construction, and state environmental service agencies. The City of Pittsburgh Office of Management and Budget, on behalf of its Department of Mobility & Infrastructure, appears as a repeat buyer in the recent-opportunities block, soliciting modular block wall construction across multiple bid cycles.

Activity concentrates in Pennsylvania, California, Connecticut, and Maryland, with the most substantial recent work in Pittsburgh and Allegheny County. The City of Pittsburgh issued ITB 2024-IFB-003 for modular block wall construction across 47 line items—including excavation, Dura-Hold modular retaining wall unit installation, bituminous paving, concrete sidewalk and curb work, and handicap ramps—with a contract period through May 1, 2026, and question submission by April 16, 2024. Santa Clara County solicited comprehensive pavement rehabilitation including PCC curb, curb ramp, and sidewalk work on the Central Expressway between Bowers Avenue and Scott Boulevard, with bids due May 21, 2026. The City of Torrington, Connecticut issued an ITB for an Auxiliary Building at Torrington Middle-High School requiring general construction with concrete foundation and exterior work, with a mandatory walkthrough May 8, 2026, and bids due May 19, 2026. The Maryland Environmental Service issued a sealed-bid procurement for dike raising and liner installation at the Masonville Dredged Material Containment Facility in Baltimore, with a 24 percent MBE participation goal and bids due April 24, 2026. Prevailing wage requirements apply to projects exceeding defined thresholds, and performance bonds equal to 100 percent of contract value are standard.