PSC L056

PSC L056 — Technical Representative: Construction and Building Materials

Overview The Product Service Code (PSC) framework is a standardized four-character taxonomy used across U.S. federal procurement systems to classify products, services, and research and development purchased under contract. PSCs provide consistent FPDS reporting, spend analysis, category management, and cross-agency comparison; the PSC Manual maintained by GSA is the authoritative reference for PSC definitions, grouping, and maintenance. PSCs are assigned at the contract and contract line-item level to reflect the predominant supply or service being acquired and to support federal spend visibility, reporting, and compliance activities. ¹

PSC L056 designates the technical-representative function associated with construction and building materials products and related technical support activities. It is applied at the contract line-item level when the predominant work involves providing a technical representative — a specialist who performs liaison, inspection, acceptance, or specification‑interpretation services — for Group 56 (Construction and Building Materials) supplies, assemblies, or equipment. Use of L056 helps agencies distinguish material‑related technical services from general construction services or supply deliveries. ²

See also on G2X:

• PSC L056
• PSC L055 (Lumber, Millwork, Plywood, and Veneer)
• PSC L054 (Prefabricated Structures and Scaffolding)

What this PSC covers

• Technical representation and on-site technical oversight tied to procurement of construction materials, components, and building-system assemblies.
• Inspection, acceptance sampling, conformity assessment, and documentation activities tied directly to building‑materials deliveries.
• Acting as the technical liaison between suppliers, subcontractors, and the contracting officer for material acceptance and installation clarification.
• Expert review, interpretation, and validation of material specifications, installation guidance, test reports, and warranty claims related to construction materials.
• Coordination of testing, sampling, laboratory confirmation, and final acceptance paperwork required for building‑materials compliance and acceptance. ²

Related NAICS and PSC codes

• Type | Code | Descriptor
• • | - | -
• PSC | L054 | Prefabricated Structures and Scaffolding
• PSC | L055 | Lumber, Millwork, Plywood, and Veneer
• PSC | L058 | Communication, Detection, and Coherent Radiation Equipment

(These adjacent PSCs appear in the PSC Manual within the same Group/Category for equipment and construction‑related materials; agencies apply NAICS crosswalks according to acquisition requirements and reporting rules.) ²

Typical procurement contexts

• Construction supply contracts or material‑delivery agreements that include an assigned vendor technical representative whose primary role is to oversee materials acceptance, witness tests, or advise on installation and compatibility. ²
• Indefinite-delivery/indefinite-quantity (IDIQ) supply arrangements or task orders where technical oversight for delivered building components is specified as a distinct contract line-item and the technical‑representative function is the predominant deliverable. ²

Frequently asked questions

• Q: When should L056 be assigned to a contract line item?
  A: Assign L056 when the principal deliverable of the line item is the technical‑representative service tied to construction or building materials — that is, when inspection/liaison/technical‑review is the dominant work rather than the physical supply. ²

• Q: Is L056 a service PSC or a supplies PSC?
  A: L056 classifies the technical‑representative function associated with Group 56 supplies; it is used at the contract line‑item level to capture a service function related to materials, rather than the physical supply itself. ²

• Q: Can L056 be paired with construction NAICS codes on a solicitation?
  A: Yes. Solicitations commonly specify a NAICS code that reflects the industry or vendor type and a PSC that reflects the predominant product/service. The contracting officer determines the authoritative NAICS and PSC for the acquisition and records them in FPDS. ¹

• Q: Where can I confirm the official descriptor and grouping for L056?
  A: Confirm the official PSC descriptor and group in the PSC Manual and the current PSC data files published on Acquisition.gov; those files contain the official code list, groupings, and any recent updates. ²

Useful resources

• PSC landing page (PSC Manual) on Acquisition.gov ¹
• PSC Manual — April 2025 (official PDF) ²
• PSC April 2025 data file (official code list, XLSX) ³

References

1. https://www.acquisition.gov/psc-manual
2. https://www.acquisition.gov/content/psc-manual-april-2025.pdf
3. https://www.acquisition.gov/content/psc-april-2025.xlsx

Overview

PSC L056 identifies the technical‑representative function tied to construction and building‑materials procurements where the primary deliverable is an on‑site or vendor‑provided technical specialist rather than the physical supply. Typical duties captured under this PSC include materials inspection, specification interpretation, acceptance testing witness, liaison with suppliers and contracting officers, and documentation of material conformity. Use L056 at the contract line‑item level when the technical‑representative activity is the dominant performance element so spend and performance reporting distinguish material‑related technical services from material delivery or general construction services. ^[2]

What this PSC covers

• On‑site or designated technical‑representative services for building materials and related assemblies, including inspection, acceptance sampling, and witnessing of tests.
• Interpretation, verification, and documentation of material specifications, certificates of conformance, test reports, and warranty/claim reviews tied to Group 56 supplies.
• Acting as the technical liaison between suppliers, subcontractors, and the contracting officer for materials acceptance, installation clarification, and corrective actions.
• Coordination and oversight of laboratory confirmation, sampling programs, and final acceptance paperwork required for material compliance. ^[2]

Related NAICS and PSC codes

Adjacent PSCs (same Group/Category) commonly considered when classifying material‑related technical services:

• PSC | L054 | Prefabricated Structures and Scaffolding
• PSC | L055 | Lumber, Millwork, Plywood, and Veneer
• PSC | L058 | Communication, Detection, and Coherent Radiation Equipment
• PSC | L056 | Technical Representative: Construction and Building Materials ^[2]

NAICS crosswalks for a given acquisition are established by the contracting officer at time of award; the PSC Manual does not prescribe a single, definitive NAICS assignment for L056