Contracts and Specifications Examples

The following progressive examples demonstrate key contractual calculations in construction project management, including liquidated damages, unit price variances, guaranteed maximum price contracts, and conceptual case studies.

Problem 1: Liquidated Damages - Basic Application

A contract specifies a completion date of October 1st. The contractor finishes the project on October 15th. The contract includes a Liquidated Damages (LD) clause of $1,500 per calendar day of delay. The owner claims they lost $20,000 in potential rent during those 1515 days. How much can the owner deduct from the contractor's final payment?

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Problem 2: Liquidated Damages - Intermediate Calculation with Excusable Delays

A contractor is 3030 days late on a project. However, they properly documented and requested a time extension for 1010 days of severe, unseasonable weather (excusable/non-compensable) and 55 days due to the owner failing to provide site access (excusable/compensable). The LD rate is $2,000 per day. What are the final liquidated damages?

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Problem 3: Liquidated Damages - Substantial Completion

A contract imposes liquidated damages of $3,000 per day for missing the completion deadline of June 1. The contractor reaches Substantial Completion on June 11 but completes the final punch list items on June 20. How much is assessed in liquidated damages?

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Problem 4: Unit Price Contract Payment - Basic Quantity Variance

A contractor bid on a highway project containing an estimated 5,0005,000 cubic meters (m3m^3) of excavation at a unit price of $12.00 / m3m^3. After the work was completed, surveyors measured the actual excavated volume to be 5,400m35,400 \, m^3. How much is the contractor paid for this item?

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Problem 5: Unit Price Contract Payment - Significant Variation Clause

A contract estimated 10,00010,000 tons of asphalt at $80 / ton\text{ton}. The contract includes a clause that if actual quantities vary by more than 20%20\% from the estimate, unit prices must be renegotiated. The actual quantity required was 13,00013,000 tons. The contractor proved their costs increased, and the new agreed price for the overage is $90 / ton\text{ton}. Calculate the total payment.

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Problem 6: Lump Sum Contract - Percentage of Completion

A contractor has a Lump Sum contract for a building project worth $2,500,000. At the end of the second month, the project is assessed to be 35%35\% complete. The contractor previously received a payment of $400,000 for the first month. The contract specifies a 10%10\% retainage. What is the net payment due to the contractor for month two?

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Problem 7: Cost Plus Fee - Guaranteed Maximum Price (GMP)

A contract is signed for Cost Plus a Fixed Fee of $100,000, with a Guaranteed Maximum Price (GMP) of $1,500,000. During construction, the contractor experiences severe cost overruns, and the actual reimbursable cost of the work reaches $1,450,000. How much is the contractor paid, and what is their effective profit?

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Problem 8: Cost Plus Fee - GMP with Shared Savings

A contractor operates under a GMP contract set at $2,000,000. The agreement includes a 60%/40%60\% / 40\% shared savings clause (60%60\% to the owner, 40%40\% to the contractor) for any final costs below the GMP. The contractor's fixed fee is $150,000. If the final reimbursable costs are $1,700,000, calculate the total amount the contractor receives and their total profit.

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Conceptual Case Study 1: Contract Documents Hierarchy

A conflict arises during the construction of a commercial building. The general conditions of the contract state that testing of concrete must be done by an independent lab paid for by the owner. However, the technical specifications for concrete clearly state that the contractor must hire and pay for the testing laboratory. In a typical contract hierarchy, how is this conflict resolved?

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Conceptual Case Study 2: Constructive Changes

A contractor is excavating for a foundation when they encounter unexpected, undocumented bedrock not shown in the geotechnical report provided by the owner. The owner's representative insists the contractor must proceed with the excavation without extra pay, arguing the contractor should have inspected the site better. The contractor proceeds but files a claim for extra costs. What contract concept applies here?

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Conceptual Case Study 3: Breach of Contract vs. Termination for Convenience

A city municipality signs a contract for a new community center. Halfway through the project, a new mayor is elected who decides to cancel the project to redirect funds elsewhere. The contractor has not missed any deadlines or performed defective work. How can the city end the contract, and what are the financial implications?

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Conceptual Case Study 4: Implied Warranties (Spearin Doctrine)

An owner provides a contractor with highly detailed blueprints and specifications for a custom HVAC system. The contractor builds the system exactly as specified, without deviation. However, upon startup, the system fails to adequately cool the building because the engineering calculations provided by the owner's designer were flawed. The owner demands the contractor fix the issue at their own expense. Who is liable?

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