UniFormat
A classification system that organizes construction information by building element rather than by work result.
Definition
UniFormat is a classification system that organizes construction information by building element — substructure, superstructure, exterior enclosure, interiors, services, equipment — rather than by work result. It is the complement to MasterFormat and is published jointly by CSI and CSC.
UniFormat is used primarily during the design phase, when scope is described in terms of building systems rather than the trade-by-trade specifications that come later in design development.
How uniformat is used in estimating
For estimators, UniFormat is the natural structure for conceptual and schematic-design estimates. Early in design, before specifications exist, the project is described as so many square feet of foundation, exterior wall, roof, interior partitions, and so on. Cost data organized by UniFormat (often expressed as cost per square foot of element) lets estimators produce credible budgets at design phases when MasterFormat-level detail is impossible.
As design progresses, the conceptual UniFormat estimate is gradually translated into a MasterFormat estimate. The UniFormat budget for "exterior enclosure" gets broken down into MasterFormat sections for masonry, glazing, metal panels, and waterproofing as the design develops. Estimators on design-build and CMAR (construction management at risk) projects work in both formats simultaneously, using UniFormat for early budget conversations and MasterFormat for buyout and BOQs.
When to use UniFormat
Use UniFormat for conceptual estimates, programming budgets, schematic-design estimates, and any cost discussion held before specifications are written. Use MasterFormat once specifications exist and the work is being broken into trade scopes. Keeping a clean mapping between UniFormat budget categories and MasterFormat estimate sections lets the project team trace early budget assumptions through to final cost without losing the audit trail.
Frequently asked questions
Q.What is the difference between UniFormat and MasterFormat?
UniFormat organizes by building element (substructure, exterior enclosure, interiors). MasterFormat organizes by work result (concrete, glazing, drywall). UniFormat is used during early design; MasterFormat is used for construction documents and pricing.
Q.When is UniFormat used in estimating?
During conceptual, schematic-design, and design-development estimating, before specifications are complete. Cost-per-square-foot benchmarks for elements like exterior enclosure are typically expressed in UniFormat terms.
Q.Is UniFormat used in MEP estimating?
Yes — at the conceptual level, MEP costs are often estimated as a percentage of total construction cost or as cost per square foot, organized under UniFormat services categories. Detailed MEP estimating later in design switches to MasterFormat.
Q.Are UniFormat and ASTM UniFormat the same?
They are closely related. The current standard is jointly published by CSI/CSC, with parallel development through ASTM (E1557). Practitioners typically refer to all of them as UniFormat.
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