Chapter 4: The Construction Contract – Study Notes
The construction contract is an agreement between the owner and the contractor and is enforceable by law. The contractor promises to perform a service for consideration.
Contract documents are more than just an agreement form; they direct construction and allocate responsibilities. All documents together constitute the contract documents.
Two major components of the contract documents:
The construction drawings (also called construction documents or working drawings): define the quantity of work (length, width, area, volume, etc.).
The project manual (includes the specifications): define the quality of the work.
The contract documents communicate the design intent from the architect/engineer to the contractor; completeness and absence of errors are critical.
Before bidding and during construction, the team must fully familiarize itself with the contract documents.
Discrepancies between drawings and specs are common; guidelines typically state that the more-detailed drawings prevail over less-detailed drawings, but the specifications take precedence over drawings overall.
The project’s outcome is largely determined by the contract documents; the contractor’s work is judged against them.
The Drawings
Reading construction drawings is a fundamental skill; drawings include symbols, abbreviations, and lines that convey instructions to the builder.
Drawings are the primary communication tool for conveying the owner’s design intent.
Historical evolution of drawings:
Pre-Renaissance: master builders used models and sketches.
Renaissance: drawings and written instructions on paper became the main communication method.
Today: computer-generated 3D models supplement 2D drawings; CAD printing is standard.
Two-dimensional plans are increasingly supplemented or superseded by 3D models, but it remains essential to understand what constitutes a complete set of construction drawings.
Drawing production history:
Old term “blueprints” came from printing on blue paper with white lines; today we print blue lines on white paper (bluelines) but most drawings are electronically produced via CAD.
The common phrase “back to the drawing board” is now largely obsolete; redesigns return to the computer.
Drawing size ranges:
Small sets (3–4 sheets) for simple projects up to large sets (>100 sheets) for grand structures.
Typical sheet sizes range from 24″ × 36″ to 36″ × 48″ or larger.
Organization and standards:
Drawings are organized by design discipline and numbered for reference: Civil (C), Architectural (A), Structural (S), Mechanical (M), Electrical (E).
Typical cover sheet lists project owner, architect, engineers, and location. Vicinity maps or subdivision plats may appear on the cover.
Civil drawings precede architectural, structural, mechanical, and electrical drawings in the set.
Disciplines and typical drawings:
Civil drawings (C1, C2, …): site work, grading, demolition, excavation, site utilities, streets, curbs, gutters, and sometimes landscaping.
Architectural drawings (A1, A2, …): overall aesthetics, project size, shape, exterior/interior details, floor plans, elevations, sections, door/window schedules, finish schedules.
Structural drawings (S1, S2, …): major structural components; calculations for vertical and lateral loads (wind, earthquake).
Mechanical drawings (M1, M2, …): plumbing and HVAC; calculations for equipment sizing and energy compliance.
Electrical drawings (E1, E2, …): rough wiring, transformers, panel boxes, receptacles, switches, lighting, and communications wiring.
Perspective drawing is a 2D depiction of a 3D object and helps visualize the project.
The construction manager must be able to interpret all drawings, which takes years of experience.
Types of drawings (four basic types) used to communicate design intent:
Plans: plan view (horizontal cut through the building). Typical plan views include foundation plans, floor plans, and framing plans; most plans are drawn at a ¼″ scale, though some large projects may require ⅛″ scale.
Elevations: outside views of the building; usually ¼″ scale (sometimes ⅛″).
Sections: vertical cuts through the building to show internal relationships; often ½″ scale (may be reduced to ¼″ if space is limited).
Details: blown-up views of specific areas to show finer construction elements; scales can be 1″, 1½″, or 3″ depending on detail required.
Common drawing size notes:
A ¼″ scale is commonly used, but there is a note that at times ¼″ represents 1″ in true dimension, which would imply a drawing is 48× smaller than the real thing when converting to feet (12 inches per foot). This nuance is important for interpretation and is presented in the material.
Potential discrepancies across drawing types are addressed in contract documents; the project manual (specifications) often provides the definitive guidance when conflicts arise.
The Project Manual
The project manual is the second part of the contract documents and is often called the specs.
It contains written instructions and administrative details in addition to technical specifications.
The manual includes:
Bidding requirements
Contracting requirements
Written specifications for every detail of the building
The project manual provides the administrative “red tape” of a construction project, which is a primary function of the construction manager to understand, organize, coordinate, and manage.
The project manual is typically organized into four primary sections:
Bidding documents
General conditions
Supplemental (special) conditions
Technical specifications
The documents work together to tell the builder not only “what” to build (drawings) but also “how” and under what rules and processes (specs and conditions).
Bidding Documents
The bidding section includes four documents:
Advertisement or invitation for bids: notice to interested parties about the project and bidding requirements (refer to Chapter 3 in the course material).
Instructions to bidders: detailed bidding procedures, including:
Procedures for questions and clarifications about contract documents
Addenda (changes or additions after release but before bids are due)
Receipt of addenda and inclusion as part of the contract documents
Rules on bid submission, bond requirements, bid openings, bid rejection, and notifying the successful bidder
Rules on bid withdrawal
Post-bid deliverables (e.g., schedule of values, cash flow projections, construction schedule, payment/ performance bonds, etc.)
Bid forms: the actual forms to be filled out, including bid price, completion date, subcontractors, alternates, and addenda receipt; may include MWBE compliance forms as required by the project.
The agreement form: a copy of the contract form that will be signed after award; owners may specify the contract type to be used.
MWBE compliance: some projects require Minority and Women’s Business Enterprise participation; a specific MWBE certification form may be provided with the bid forms.
General Conditions (and standard forms) are critical for defining the relationship and responsibilities; standard forms such as AIA A201 are common in the industry because they are familiar and court-tested.
The General Conditions section details the standard clauses and responsibilities (see below for a full list).
The General Conditions (Standard Clauses)
General provisions: basic contract definitions, the work, drawings, and specifications ownership and intent.
Owner responsibilities: what the owner must provide and the owner’s rights (to stop work, to carry out work, etc.).
Contractor responsibilities: construction procedures, supervision, labor, materials, warranty, taxes, permits, notices, schedules, submittals, product data, and cleanup.
Administration of the contract: architect’s role in site visits and inspections; handling time extensions, claims, and disputes.
Subcontracts and subcontractor relations: how subcontracts to specialty contractors are awarded by the general contractor.
Construction by owner or others: owner’s right to perform work or use other contractors.
Changes in the work: how changes are authorized and processed; a frequent point of contention.
Time and schedule requirements: project startup, progress, and completion relative to the schedule; delays and extensions.
Payments and completion: how progress payments are made; withholding and nonpayment issues.
Protection of persons and property: safety, hazardous materials, emergencies, and safety programs.
Insurance and bonds: insurance/bonding requirements for parties.
Uncovering and correction of work: acceptance of work by the architect (as owner’s agent) and responsibilities to uncover/correct work.
Miscellaneous provisions: successors/assigns, tests/inspections, interest on delayed payments.
Termination or suspension of the contract: conditions under which parties may terminate or suspend.
Note: The AIA A201 general conditions are a common standard; using a standard form helps with familiarity and legal soundness.
Supplemental Conditions
Supplemental (special) conditions address project-specific items beyond standard general conditions, augmenting terms.
Examples of project-specific information that may appear in supplemental conditions:
Soils and soil-testing information supplied by the owner
Survey information supplied by the owner
Materials or other services provided by the owner
Job signage requirements and traffic control/safety requirements
Phasing or special schedule requirements
Security requirements
Temporary facilities and sanitation requirements
Technical Specifications
The bulk of the project manual; more about construction than administration.
The specifications work with the plans to describe the detail that cannot be conveyed graphically.
The purpose of the specifications includes clarifying:
Quality of materials
Standard of workmanship
Methods of installation and erection
Quality control and quality assurance procedures
Every material and installation must be identified and specified across drawings and specifications (from foundations to small fixtures).
An organizational system is used to manage this information: the MasterFormat (developed by the Construction Specifications Institute).
The MasterFormat (CSI) and Organization of Specifications
The MasterFormat is the primary organizational framework for project manuals and specifications.
It standardizes how information is structured, aiding design teams, contractors, and project stakeholders in communication, pricing, and cost tracking.
The MasterFormat is broken into two primary groups:
Procurement and Contracting Requirements Group (Division 00): introductory information, procurement requirements, and contracting requirements.
Specifications Group (Divisions 01–49): the actual technical specifications.
The Specifications Group is further divided into 5 subgroups:
General Requirements Subgroup – Division 01
Facility Construction Subgroup – Divisions 02–19
Facility Services Subgroup – Divisions 20–29
Site and Infrastructure Subgroup – Divisions 30–39
Process Equipment Subgroup – Divisions 40–49
Each subgroup contains specific divisions (e.g., Division 02 Existing Conditions; Division 03 Concrete; Division 04 Masonry; Division 05 Metals; Division 06 Wood, Plastics, and Composites; Division 07 Thermal and Moisture Protection; Division 08 Openings; Division 09 Finishes; Division 10 Specialties; Division 11 Equipment; Division 12 Furnishings; Division 13 Special Construction; Division 14 Conveying Systems; Divisions 15–19 reserved).
The 49 divisions of the Specifications Group are designed to cover all typical construction materials and systems; some divisions may be reserved for future needs.
Examples of divisions (selected):
Division 02: Existing Conditions
Division 03: Concrete
Division 04: Masonry
Division 05: Metals
Division 06: Wood, Plastics, and Composites
Division 07: Thermal and Moisture Protection
Division 08: Openings
Division 09: Finishes
Division 10: Specialties
Division 11: Equipment
Division 12: Furnishings
Division 13: Special Construction
Division 14: Conveying Systems
Division 21: Fire Suppression
Division 22: Plumbing
Division 23: Heating, Ventilating, and Air Conditioning (HVAC)
Division 25: Integrated Automation
Division 26: Electrical
Division 27: Communications
Division 28: Electronic Safety and Security
Division 30–39: Site and Infrastructure (e.g., earthwork, exterior improvements, utilities, transportation, waterway/marine)
Division 31–35: Site work, utilities, transportation, etc.
Divisions 40–49: Process Equipment and related equipment for specialized facilities
Reserved divisions: 15–19, 29, 36–39, 46–47, 49 (held in reserve for future needs).
MasterFormat details:
The CSI MasterFormat uses a six-digit numbering system to allow expansion; the first two digits = Level 1 (Division), next two = Level 2, next two = Level 3, and Level 4 (if used) adds another two digits after a dot.
Example numbering: 04 21 13.13 corresponds to Brick Veneer Masonry within Division 04 (Masonry) → Level 2: 04 21 00 (Brick Masonry) → Level 3: 04 21 13 (Brick Masonry) → Level 4: 04 21 13.13 (Brick Veneer Masonry).
Benefits of MasterFormat:
Clarity in communication among project players
Easier access to information for time, budget, and quality management
Widely used across the industry, facilitating benchmarking and data sharing
The MasterFormat is reviewed and updated regularly (e.g., 2018 edition with additions/changes from 2016); stay current via the CSI MasterFormat resources.
The MasterFormat framework helps in organizing estimates and tracking project costs and is essential for construction managers.
Contract Types
Owners typically decide the project delivery method and contract type based on project type and risk tolerance.
The four basic contract types:
Lump-Sum (Fixed Price): contractor completes the work for a single fixed amount. Pros: price is known up front; cons: flaws in plans/specs lead to change orders; risk is shifted to the owner for design omissions and errors.
Cost-Plus-Fee (Time and Materials): owner reimburses actual costs plus a fixed fee or percentage. Pros: good when scope is uncertain or time is of the essence; cons: owner bears cost risk and requires meticulous cost accounting and documentation.
Guaranteed Maximum Price (GMP): a hybrid of lump-sum and cost-plus-fee; actual costs are reimbursed up to a maximum price; any savings below the GMP go to the owner (and sometimes are shared with the contractor as an incentive).
Unit-Price Contracts: quantities cannot be precisely measured in advance; bids are based on unit costs for measured quantities; final price depends on actual quantities; owner bears price variance risk due to quantity changes.
Each contract type incorporates standard contract sections but differs in price quotation and risk allocation.
Examples and Illustrations (Tables and Notes)
Lump-Sum Contract (Table 4.1): scenarios showing how actual cost deviations affect contractor/owner impact when the contract amount remains fixed at the bid price.
Example data (illustrative):
Contract Amount: , Actual Cost: , Contractor impact: loss of ; Owner impact: none beyond the fixed contract amount.
Contract Amount: , Actual Cost: , Contractor impact: gain of ; Owner impact: none beyond the fixed contract amount.
Cost-Plus-Fee (Table 4.2): shows actual cost, fee, and contract amount; fee is a percentage of cost, and the contract amount equals cost plus fee.
Example data: Actual Cost ; Fee as % of Cost ; Contract Amount ; No specific impact noted beyond fee realization (the owner pays for actual costs plus fixed fee).
Note: A typical fee shown is 5% in this example.
Guaranteed Maximum Price (Table 4.3): indicates how GMP caps the price while allowing for cost savings to accrue to the owner (or shared with the contractor).
Example data: GMP Contract Amount ; Actual Cost + Fee ; Contractor impact: loss ; Owner impact: none (price remains the same).
Another example: Actual Cost ; No impact on contract amount; owner benefits from savings of .
Shared savings note (GMP): Owners often provide a shared-savings incentive (e.g., 60/40 or 50/50) to encourage efficiency.
Unit-Price Contract (Table 4.4): demonstrates how final costs are determined by actual quantities; final price depends on quantities, while unit prices remain fixed.
Example data (summary): Trench excavation — estimated 14,000 CY at $5.25 per CY gives $73,500; actual 13,500 CY costs $70,875.
8″ pipe — 1,750 LF at $18.24 per LF yields $31,920; quantities unchanged, cost matches bid.
Engineered fill — estimated 4,500 CY at $22.50 per CY yields $101,250; actual 4,700 CY costs $105,750.
Backfill — estimated 9,500 CY at $4.00 per CY yields $38,000; actual 9,800 CY costs $39,200.
Final total: initial bid $244,670; final cost $247,745.
Terms to Know
Addendum: A written or graphic instrument issued by the architect or engineer during the bidding period, before the award of contract, altering, clarifying, or adding to the bidding documents.
Change order: A written order to the contractor signed by the owner and architect, issued after the execution of the contract, authorizing a change in the work or adjustment in the contract sum or contract time.
Guaranteed Maximum Price (GMP): A contract type where the contractor is reimbursed for actual costs up to an agreed-upon maximum price, often with provisions for sharing any cost savings below the GMP.
Perspective drawing: A two-dimensional drawing that depicts a three-dimensional object or scene in a way that conveys depth and spacial relationships, aiding in project visualization.
Contract documents: The complete set of written agreements, drawings, and specifications that define the scope of work, conditions, and responsibilities for a construction project.
Time and materials (Cost-Plus-Fee): A contract type where the owner reimburses the contractor for all actual costs incurred (e.g., labor, materials, equipment) plus an agreed-upon fixed fee or percentage for overhead and profit.
CAD: An acronym for Computer-Aided Design, referring to the use of computer systems to assist in the creation, modification, analysis, or optimization of a design.
Review Questions Answered
What two major components make up the contract documents?
The two major components are The construction drawings and The project manual (which includes the specifications).
When did architects first begin to use drawings to communicate their design intent?
Architects first began to use drawings and written instructions on paper as the main communication method during the Renaissance.
What does CAD stand for?
CAD stands for Computer-Aided Design.
There is a particular way in which the drawings are organized in a set of plans. Identify the order of drawings in a typical set of plans.
Drawings are typically organized by design discipline and numbered for reference. The order is: Civil (C) → Architectural (A) → Structural (S) → Mechanical (M) → Electrical (E). Civil drawings precede all others in the set.
What is the difference between a plan view and a section view in a set of drawings?
A plan view is a horizontal cut through the building, showing layout from above. A section view is a vertical cut through the building, showing internal relationships and construction elements.
Name the four primary sections of a project manual.
The four primary sections are: Bidding documents, General conditions, Supplemental conditions, and Technical specifications.
The CSI MasterFormat is broken down into how many divisions?
The CSI MasterFormat is broadly broken into two primary groups: the Procurement and Contracting Requirements Group (Division 00) and the Specifications Group (Divisions 01–49). This means it comprises 50 divisions in total (00 through 49).
Under which CSI division would you find building insulation?
Building insulation would be found under Division 07: Thermal and Moisture Protection.
Name the four basic types of construction contracts.
The four basic contract types are: Lump-Sum (Fixed Price), Cost-Plus-Fee (Time and Materials), Guaranteed Maximum Price (GMP), and Unit-Price Contracts.
Under a guaranteed maximum price contract, what happens if the actual cost is less than the guaranteed maximum contract price?
If the actual cost is less than the guaranteed maximum contract price (GMP), any savings typically go to the owner. Owners often provide a shared-savings incentive, where savings are split between the owner and the contractor (e.g., 60/40 or 50/50).
Additional Notes and References
The CSI MasterFormat is a living standard; stay updated via the CSI website (MasterFormat editions evolve and add new divisions or modify existing ones).
The MasterFormat reference framework helps in organizing project information, estimates, cost databases, and supplier data for efficient project management.
The notes above reflect the chapter’s emphasis on how drawings, specs, and contract clauses work together to govern construction work, costs, risk, and quality.