FAR 52.236-21—Specifications and Drawings for Construction.
Plain-English Summary
FAR 52.236-21, Specifications and Drawings for Construction, sets the basic rules for how construction contractors, subcontractors, and the Government use contract drawings, specifications, and shop drawings during performance. It addresses the contractor’s duty to keep current contract documents at the job site and provide the Contracting Officer access; how to resolve conflicts between drawings, specifications, and figures; how to interpret common contract words such as “directed,” “approved,” and “as shown”; what “provided” means in construction specifications; the definition and Government use rights for shop drawings; the contractor’s duty to coordinate, review, and submit shop drawings; the effect of Government approval or disapproval; how to handle variations from contract requirements; and the number of copies and record-set requirements, including the two alternates for final record shop drawings. In practice, this clause is a core administration tool for construction contracts because it establishes document hierarchy, clarifies interpretation, and controls the submittal/approval process for fabrication and installation details. It helps prevent field disputes by requiring prompt submission of discrepancies to the Contracting Officer rather than unilateral contractor action. It also protects the Government by making clear that approval of shop drawings does not waive contract requirements except for approved variations handled through the proper process. For contractors, the clause is especially important because mistakes in coordination, premature work, or undocumented deviations can shift cost and schedule risk back to the contractor.
Key Rules
Keep documents on site
The contractor must keep a copy of the drawings and specifications at the work site and give the Contracting Officer access at all times. This ensures both parties are working from the same contract documents during performance.
Specifications control conflicts
Anything shown in one document but not the other is treated as if included in both, but if there is a direct difference between drawings and specifications, the specifications govern. If there is a discrepancy in figures, the matter must be promptly submitted to the Contracting Officer for a written determination.
No unilateral adjustments
The contractor may not resolve discrepancies on its own without a written determination from the Contracting Officer. Any adjustment made without that determination is at the contractor’s risk and expense.
Contracting Officer may issue details
The Contracting Officer will furnish detailed drawings and other information as considered necessary, unless the contract says otherwise. This supports administration of the work and fills in details needed for performance.
Interpretation of directive words
Words such as “directed,” “required,” “ordered,” “designated,” and similar terms mean directed by the Contracting Officer unless the contract expressly states otherwise. Likewise, “approved,” “acceptable,” and “satisfactory” mean approved by, acceptable to, or satisfactory to the Contracting Officer.
Reference words point to contract drawings
Phrases like “as shown,” “as indicated,” and “as detailed” refer to the drawings accompanying the contract unless stated otherwise. The word “provided” means furnish and install completely in place.
Shop drawings are broadly defined
Shop drawings include detailed fabrication and assembly drawings, installation details, and related materials such as diagrams, layouts, schematics, descriptive literature, schedules, and test data. The Government may duplicate, use, and disclose shop drawings delivered under the contract for any purpose.
Contractor must coordinate and review shop drawings
If shop drawings are required, the contractor must coordinate them, check them for accuracy, completeness, and compliance, and show its approval before submission. Submittals lacking contractor approval may be returned.
Government approval is limited
The Contracting Officer will approve or disapprove shop drawings and must state reasons for disapproval. However, approval does not relieve the contractor of responsibility for errors, omissions, or compliance with the contract, except for approved variations handled under the clause.
Variations must be identified in writing
If shop drawings vary from contract requirements, the contractor must describe the variations in writing separate from the drawings when submitting them. Approved variations generally require a contract modification, unless the change is minor or has no price or time impact.
Submit required copies and record sets
The contractor must submit the required number of copies of shop drawings, typically four unless otherwise indicated. The Contracting Officer retains three sets and returns one set to the contractor; the alternates require final record shop drawings or prints at completion when record sets are needed.
Responsibilities
Contractor
Keep current drawings and specifications at the work site; provide access to the Contracting Officer; identify and promptly submit discrepancies; avoid unilateral changes; coordinate, review, approve, and submit shop drawings; describe any variations in writing; wait for approval before proceeding where required; bear the risk of work done before approval; submit the required number of copies; and furnish final record shop drawings or prints when required by the applicable alternate.
Subcontractor and lower-tier subcontractors
Prepare shop drawings and related submittals as applicable, but do so through the contractor’s coordination and review process. Their materials are subject to the same contract requirements and Government review process as the contractor’s submissions.
Contracting Officer
Review and determine discrepancies in writing; furnish detailed drawings and other information as necessary unless otherwise provided; approve or disapprove shop drawings and state reasons for disapproval; approve or reject proposed variations; and issue contract modifications when approved variations require a change in price, time, or other contract terms.
Government
Receive, retain, and use shop drawings as permitted by the clause; duplicate, use, and disclose delivered shop drawings for any purpose; and administer the submittal process consistent with the contract and the clause’s approval limits.
Practical Implications
This clause makes document control a daily jobsite issue, not just a contract administration formality. Contractors should keep the latest approved drawings and specifications on site and make sure field crews are not working from outdated versions.
Discrepancies must be elevated quickly. If a contractor guesses at a conflict between drawings, specifications, or figures and proceeds without a written determination, the contractor can end up paying for rework, delay, or noncompliance.
Shop drawing approval is not a blanket waiver. A common mistake is assuming Government approval means the contractor is relieved of responsibility; in fact, the contractor still owns coordination, accuracy, and compliance unless a variation was specifically approved.
Variations must be clearly flagged and separated from the drawing package. If a contractor buries a deviation in the submittal, the Government may miss it, and the contractor may later be required to correct the work or absorb the cost.
The alternates matter at closeout. Where record shop drawings are required, contractors should plan early for final as-built-style shop drawing deliverables, including the correct format and number of copies or prints specified by the contract.
Official Regulatory Text
As prescribed in 36.521 , insert the following clause: Specifications and Drawings for Construction (Feb 1997) (a) The Contractor shall keep on the work site a copy of the drawings and specifications and shall at all times give the Contracting Officer access thereto. Anything mentioned in the specifications and not shown on the drawings, or shown on the drawings and not mentioned in the specifications, shall be of like effect as if shown or mentioned in both. In case of difference between drawings and specifications, the specifications shall govern. In case of discrepancy in the figures, in the drawings, or in the specifications, the matter shall be promptly submitted to the Contracting Officer, who shall promptly make a determination in writing. Any adjustment by the Contractor without such a determination shall be at its own risk and expense. The Contracting Officer shall furnish from time to time such detailed drawings and other information as considered necessary, unless otherwise provided. (b) Wherever in the specifications or upon the drawings the words "directed," "required," "ordered," "designated," "prescribed," or words of like import are used, it shall be understood that the "direction," "requirement," "order," "designation," or "prescription," of the Contracting Officer is intended and similarly the words "approved," "acceptable," "satisfactory," or words of like import shall mean "approved by," or "acceptable to," or "satisfactory to" the Contracting Officer, unless otherwise expressly stated. (c) Where "as shown," "as indicated," "as detailed," or words of similar import are used, it shall be understood that the reference is made to the drawings accompanying this contract unless stated otherwise. The word "provided" as used herein shall be understood to mean "provide complete in place," that is "furnished and installed." (d) Shop drawings means drawings, submitted to the Government by the Contractor, subcontractor, or any lower tier subcontractor pursuant to a construction contract, showing in detail (1) the proposed fabrication and assembly of structural elements, and (2) the installation ( i.e., fit, and attachment details) of materials or equipment. It includes drawings, diagrams, layouts, schematics, descriptive literature, illustrations, schedules, performance and test data, and similar materials furnished by the contractor to explain in detail specific portions of the work required by the contract. The Government may duplicate, use, and disclose in any manner and for any purpose shop drawings delivered under this contract. (e) If this contract requires shop drawings, the Contractor shall coordinate all such drawings, and review them for accuracy, completeness, and compliance with contract requirements and shall indicate its approval thereon as evidence of such coordination and review. Shop drawings submitted to the Contracting Officer without evidence of the Contractor’s approval may be returned for resubmission. The Contracting Officer will indicate an approval or disapproval of the shop drawings and if not approved as submitted shall indicate the Government’s reasons therefor. Any work done before such approval shall be at the Contractor’s risk. Approval by the Contracting Officer shall not relieve the Contractor from responsibility for any errors or omissions in such drawings, nor from responsibility for complying with the requirements of this contract, except with respect to variations described and approved in accordance with (f) of this clause. (f) If shop drawings show variations from the contract requirements, the Contractor shall describe such variations in writing, separate from the drawings, at the time of submission. If the Contracting Officer approves any such variation, the Contracting Officer shall issue an appropriate contract modification, except that, if the variation is minor or does not involve a change in price or in time of performance, a modification need not be issued. (g) The Contractor shall submit to the Contracting Officer for approval four copies (unless otherwise indicated) of all shop drawings as called for under the various headings of these specifications. Three sets (unless otherwise indicated) of all shop drawings, will be retained by the Contracting Officer and one set will be returned to the Contractor. (End of clause) Alternate I (Apr 1984) . When record shop drawings are required and reproducible shop drawings are needed, add the following sentences to paragraph (g) of the basic clause: Upon completing the work under this contract, the Contractor shall furnish a complete set of all shop drawings as finally approved. These drawings shall show all changes and revisions made up to the time the equipment is completed and accepted. Alternate II (Apr 1984) . When record shop drawings are required and reproducible shop drawings are not needed, the following sentences shall be added to paragraph (g) of the basic clause: Upon completing the work under this contract, the Contractor shall furnish _____ [ Contracting Officer complete by inserting desired amount ] sets of prints of all shop drawings as finally approved. These drawings shall show changes and revisions made up to the time the equipment is completed and accepted.