and proceeding to successively more detailed subdivisions of these systems at Levels 2-5.
The resulting levels of detail not only serve to structure cost information but also facilitate
estimates to whatever level of detail the design team can provide as the project is developed
through the design submission phases. For example, by the final concept design phase,
the design team and estimator may have Level 4 information on Substructure, but only
Level 2 detail for Interior Construction.
Although the construction industry uses several variations on the Uniformat concept,
GSA requires that cost estimators use its particular version, for consistency in use and
maintenance of GSA's cost databases. GSA's Uniformat estimating format is illustrated in
Appendix A: Estimating Formats.
masterformat estimates
MasterFormat, a product of the Construction Specifications Institute (CSI), is the most
widely used standard for organizing building-project specifications and detailed cost-
estimating data in the U.S. It is used particularly when drawings and specifications are
sufficiently detailed to allow material and equipment quantity takeoffs, and it is typically
aligned with a general contractor's approach to preparing a bid. Visit the Construction
Specifications Institute Web site (www.csinet.org) for more information.
work-item estimates
GSA Repair and Alterations (R&A) projects tend to utilize scope descriptions and cost
estimates organized by work items. While work items may vary significantly depending on
the nature of the project, as defined by GSA program offices and client requirements, the
following list reflects a typical, but not comprehensive, work-item classification for R&A
projects:
Building exterior
Electrical
Building interior
Life safety
Accessibility
Structural
Hazardous materials abatement
Mechanical
Roofing
Plumbing
Security
project estimating requirements
8
section 1.3
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