MasterFormat Division 04: Masonry

Division 04 covers masonry construction—unit masonry, stone assemblies, manufactured stone, glass unit masonry, and corrosion-resistant masonry. It spans structural and veneer applications. Learn how Division 04 organizes specification sections, connects to UniFormat and OmniClass, and how The Construction Standard provides licensed access to authoritative, edition-aware Division 04 data through CSI Dynamic Standards.

MasterFormat Division 04 organizes the specification sections, cost codes, and work results for masonry across the construction industry. As part of CSI's consensus-based classification system, Division 04 provides the authoritative structure that specifiers, estimators, contractors, and software platforms use to organize masonry work.

What Division 04 Covers

Division 04 covers masonry construction—unit masonry, stone assemblies, manufactured stone, glass unit masonry, and corrosion-resistant masonry. It spans structural and veneer applications.

This division includes unit masonry (CMU, brick, stone), stone assemblies, manufactured stone veneer, glass unit masonry, clay unit masonry, concrete unit masonry, and masonry restoration.

Division 04 contains multiple levels of sections and subsections that organize this scope into a precise, consensus-based hierarchy. These sections provide the numbering backbone for project manuals, bid packages, cost databases, and BIM models. When teams reference Division 04 consistently, every document from concept estimate to closeout speaks the same language.

Licensed through The Construction Standard, CSI Dynamic Standards includes the authoritative, always-current section numbers and titles for Division 04—searchable, cross-referenced, and edition-aware.

Who Uses Division 04
  • Architects specifying exterior cladding and structural masonry
  • Masonry contractors and stone suppliers
  • Estimators pricing masonry packages
  • Historic preservation specialists restoring masonry buildings

Whether you write specifications, estimate costs, coordinate BIM models, or build software that references masonry, Division 04 numbers and titles are the shared vocabulary your work depends on.

How Division 04 Connects to Other Standards

UniFormat

Division 04 maps to UniFormat B (Shell) for exterior wall assemblies and C (Interiors) for interior masonry partitions and finishes.

OmniClass

OmniClass Table 23 (Products) classifies masonry units, mortar, and accessories; Table 22 (Work Results) covers masonry installation work results.

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

Why Edition Awareness Matters

MasterFormat evolves through consensus-based updates. Projects that span multiple years may reference different editions. Division 04 sections may be added, renumbered, or revised between editions. Without edition awareness, teams risk referencing obsolete section numbers, creating specification conflicts, and generating RFIs that delay construction.

Licensed through The Construction Standard, CSI Dynamic Standards gives teams full edition context for Division 04—teams know which edition applies at each project milestone, what changed, and where those changes affect their work.

The Licensing Relationship

CSI—the Construction Specifications Institute—stewards Division 04 as part of MasterFormat. 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: Section numbers and titles reflect the latest CSI-approved updates
  • Edition-aware: Teams know which edition applies and what changed between releases
  • Cross-referenced: Governed relationships to UniFormat and OmniClass stay maintained
  • Integration-ready: Enterprise solutions carry Division 04 data into the tools you already use
COMMON QUESTIONS
Division 04 – Masonry covers this division includes unit masonry (CMU, brick, stone), stone assemblies, manufactured stone veneer, glass unit masonry, clay unit masonry, concrete unit masonry, and masonry restoration. It provides the authoritative section numbering used in project manuals, cost databases, bid packages, and BIM models across the construction industry.
Architects specifying exterior cladding and structural masonry, Masonry contractors and stone suppliers, Estimators pricing masonry packages, Historic preservation specialists restoring masonry buildings—anyone who writes specifications, estimates costs, manages submittals, or builds software that references masonry work results needs authoritative Division 04 section numbers and titles.
Division 04 maps to UniFormat B (Shell) for exterior wall assemblies and C (Interiors) for interior masonry partitions and finishes. OmniClass Table 23 (Products) classifies masonry units, mortar, and accessories; Table 22 (Work Results) covers masonry installation work results. CSI Dynamic Standards includes these governed crosswalks—licensed through The Construction Standard—so teams can navigate between standards without manual remapping.
If your organization uses Division 04 section numbers, titles, or descriptions in deliverables, templates, products, or platforms that others rely on, CSI Standards licensing is necessary. The license ensures you're working with authoritative, CSI-approved data that stays current with consensus-based updates.

Ready to Get Started?

CSI Dynamic Standards includes MasterFormat, UniFormat, and OmniClass as a connected, edition-aware system. The Construction Standard provides licensed access—built for the speed of your work.

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