UNSPSC 31371301: Porous blocks

UNSPSC 31371301 Porous blocks (Commodity) describes concrete masonry units and related structural blocks that state and local governments procure for construction, infrastructure repair, and site development projects. Recent opportunities show the code capturing both standalone block supply and integrated construction work where porous blocks—particularly precast concrete utility blocks and structural masonry units—form part of larger capital projects. The City of Austin's September 2026 IFQ for concrete bin blocks (2 feet by 2 feet by 6 feet units) to construct a truck dumping area at its Austin Resource Recovery facility exemplifies direct block procurement; Sanitation District No. 2-3 in Santa Clara County's infrastructure rehabilitation solicitation includes forty-eight-inch-diameter precast concrete sanitary sewer manholes as part of its sewer mainline extension work. State and local issuing bodies soliciting under this code span city public works and utility departments, county sanitation and transportation agencies, and municipal facility management operations. Work is concentrated in utility infrastructure (sewer systems, storm drainage), site preparation and containment, and building renovation supporting mechanical and structural systems.

Geographic activity centers on Texas (Austin, San Antonio) and California (Santa Clara County), with secondary activity in Georgia (Cherokee County). Representative recent solicitations include the City of Austin's concrete bin block quotation (IFQ1500KF1005, due October 7, 2026) and Sanitation District No. 2-3's infrastructure repair bid (ITBRDAFY270088, due September 17, 2026, ITB). The Davis Scott YMCA Renovation in San Antonio (IFB 15207202624, due August 25, 2026) identifies blocks among applicable product categories for accessibility and structural work. Delivery and performance locations vary by project scope; infrastructure work remains geographically dispersed across unincorporated districts and municipal corridors. Competition appears driven by material specifications and delivery timelines rather than set-asides or enterprise preferences, though the City of Austin applies MBE/WBE compliance requirements to certain projects.