OmniClass Table 49: Properties

OmniClass Table 49 classifies properties—the measurable attributes, characteristics, and data fields used to describe construction entities, products, elements, spaces, materials, and assets. Learn how Table 49 provides lifecycle classification, connects to MasterFormat and UniFormat, and how The Construction Standard provides licensed access to authoritative OmniClass data through CSI Dynamic Standards.

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Quick answer

OmniClass Table 49 – Properties provides lifecycle classification that spans design, construction, and operations. As part of CSI's comprehensive classification system, Table 49 delivers the taxonomy that BIM models, FM systems, and construction platforms need to organize properties data authoritatively.

What Table 49 Classifies

OmniClass Table 49 classifies properties—the measurable attributes, characteristics, and data fields used to describe construction entities, products, elements, spaces, materials, and assets.

This table classifies properties such as dimensions, performance attributes, capacity, rating, location, identification, sustainability attributes, warranty data, maintenance requirements, and operational characteristics.

Table 49 contains a detailed, consensus-based taxonomy that organizes this scope into categories and subcategories professionals can apply across projects. These classifications provide a shared vocabulary across the construction lifecycle. When teams apply Table 49 classifications consistently, data flows cleanly from design through construction into decades of facility operations.

Licensed through The Construction Standard, CSI Dynamic Standards includes the authoritative, always-current Table 49 classifications—searchable, cross-referenced to MasterFormat and UniFormat, and edition-aware.

The Lifecycle Role of Table 49

Table 49 property classification is critical for digital workflows. BIM parameters, asset attributes, COBie fields, digital twin records, and CMMS imports all depend on consistent property definitions that remain meaningful after construction handover.

Who Uses Table 49

  • BIM managers defining shared parameters
  • Software platforms modeling construction data fields
  • Facility managers importing asset attributes
  • Owners specifying handover information requirements

Whether you tag BIM models, manage building assets, build construction software, or organize project data, Table 49 provides the authoritative classification that keeps your work consistent with the broader industry.

How Table 49 Connects to Other Standards

MasterFormat

Table 49 properties capture the attributes specified in MasterFormat sections—performance ratings, product requirements, warranty data, and execution requirements become structured properties.

UniFormat

Properties from Table 49 describe UniFormat elements at a functional level—capacity, performance, area, system type, and lifecycle requirements can be attached to element records.

These connections are maintained by CSI through governed relationships—not assembled ad hoc by individual project teams. Through The Construction Standard, licensed access to CSI Dynamic Standards gives teams these crosswalks so they can navigate between lifecycle categories, building elements, and specification sections without manual remapping.

Why OmniClass Matters for Long-Term Value

Buildings operate for decades. The classification applied during design and construction must carry into operations, maintenance, and capital renewal. OmniClass Table 49 provides the lifecycle layer that connects design-phase decisions to operations-phase reality—ensuring that structured data doesn't lose its value at handover.

Without authoritative lifecycle classification, FM teams rebuild taxonomy from scratch. Equipment histories lose their connection to original specifications. Capital renewal budgets lack the structured data needed for systematic planning. OmniClass Table 49 prevents these disconnects by providing classification that was designed to span the full lifecycle.

The Licensing Relationship

CSI—the Construction Specifications Institute—stewards OmniClass Table 49 as part of the OmniClass standard. CSI Dynamic Standards includes MasterFormat, UniFormat, and OmniClass as a connected, edition-aware system. The Construction Standard provides licensed access to CSI Dynamic Standards:

  • Always current: Classifications reflect the latest CSI-approved updates
  • Edition-aware: Teams know which edition applies and what changed between releases
  • Cross-referenced: Governed relationships to MasterFormat and UniFormat stay maintained
  • Integration-ready: Enterprise solutions carry Table 49 data into the tools you already use

Access Current CSI Standards

CSI Dynamic Standards provides authorized access to MasterFormat, UniFormat, and OmniClass through a connected, edition-aware platform. Create an account to view access options, or review pricing for organization-wide standards use.

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Sources and review scope

Reviewed against CSI’s public standards information for scope, terminology, and licensing context. This public guide provides orientation and does not reproduce or replace the licensed standard. Content review date: July 31, 2026.

COMMON QUESTIONS
Table 49 classifies this table classifies properties such as dimensions, performance attributes, capacity, rating, location, identification, sustainability attributes, warranty data, maintenance requirements, and operational characteristics. It provides the lifecycle taxonomy that connects design, construction, and operations data across the built environment.
Table 49 properties capture the attributes specified in MasterFormat sections—performance ratings, product requirements, warranty data, and execution requirements become structured properties. Properties from Table 49 describe UniFormat elements at a functional level—capacity, performance, area, system type, and lifecycle requirements can be attached to element records. CSI Dynamic Standards includes these governed relationships—licensed through The Construction Standard—so teams can navigate between OmniClass lifecycle categories, MasterFormat specification sections, and UniFormat building elements.
BIM managers defining shared parameters, Software platforms modeling construction data fields, Facility managers importing asset attributes, Owners specifying handover information requirements—anyone who classifies, tags, organizes, or builds software that references properties data needs authoritative Table 49 classifications that stay current with consensus-based updates.
If your organization uses Table 49 classifications in BIM models, software platforms, databases, or deliverables that others rely on, CSI Standards licensing is necessary. The license ensures you're working with authoritative, CSI-approved classifications that stay current and maintain governed relationships to MasterFormat and UniFormat.

Explore closely related CSI divisions, standards, and construction classification topics.

OmniClass Table 41: MaterialsOmniClass Table 11: Construction Entities by FunctionUniFormat Element A: SubstructureMasterFormat vs OmniClass: Differences, Uses & When to Use EachOmniClassMasterFormatUniFormat

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