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In my experience, the term is "conformed" rather than "confirmed," and they are issued for the contractors convenience (although you may be required by your contract to issue them) since they simply indicate in one complete set contract information that has already been issued in other binding forms. The typical time for delivery is after the bid and prior to construction, but I have also seen conformed drawings issued later in construction where significant changes have been issued along the way. Such a set can help alleviate confusion in the field. Obviously, there is always a concern about whether the conformed set contains (purposely or accidentally) new information that hadn't previously been issued and that would affect the cost or schedule of the project. The process of confirming that the conformed set is consistent with previously issued (and contract-included) information can get more complicated as the project progresses.
In my experience, conformed sets can be issued in any project delivery arrangement. However, in a GMP contract, particularly when the GMP is provided on the basis of early phase drawings, I would not consider later stage drawings to be conformed drawings because they contain additional information that has an impact on cost and schedule. One hopes the impact will be contained within contingencies, but the information given is new and must be integrated into the cost model for the project, which is not the case with conformed drawings.
John C. Kohlhas AIA
Issues can sometimes arise around the continuous updating of conformed documents during the CA phase of a large complex construction project. It's important to clearly define the line where Conformed Drawings end and Contractor "As-Builts" begin. The role of the constructor in maintaining "As-Builts" so that record drawings can be efficiently produced at the end of a project needs to be clearly defined by all parties. Often times the contractor doesn't have the ability to do this efficiently because of technology limitations, especially where a BIM model is being used throughout the project for construction coordination purposes as well.
Michael Myers AIA, LEED Green Associate Principal | Architecture Leader 415.549.8815 d | 925.588.3313 c 417 Montgomery St., Suite 400 | San Francisco, CA 94104 email@example.com | www.hed.design LinkedIn | Facebook | Instagram
I agree. The conformed set of documents is issued once, at the start of construction. From that point forward the construction manager is responsible for maintaining record drawings during construction, which is typically maintained electronically via Procore, or Plangrid, etc. I see the VDC coordination model as a separate process. At the end of the project the construction manager will have both the PDF record set of 2D documents with any construction changes, and the completed VDC coordination model.
Donald C Henke, AIA, Assoc. DBIA, LEED AP │ Design Manager
Turner Construction Company | mobile 469-321-6946 | firstname.lastname@example.org