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FAR Clause

52.249-10

Default (Fixed-Price Construction).
View on acquisition.gov · View on eCFR.gov
Effective Date
APR 1984
Active Deviations
Versions
1 (since 2017-01-01)
RFO
RFO Version Available

The Revolutionary FAR Overhaul has published a revised version of this clause. The RFO version supersedes the eCFR text below for contracts using the RFO model; see the RFO deviation for applicability.

View RFO version
52.249-10 Default (Fixed-Price Construction).

As prescribed in 49.504(c)(1), insert the following clause:

Default (Fixed-Price Construction) (APR 1984)

(a) If the Contractor refuses or fails to prosecute the work or any separable part, with the diligence that will insure its completion within the time specified in this contract including any extension, or fails to complete the work within this time, the Government may, by written notice to the Contractor, terminate the right to proceed with the work (or the separable part of the work) that has been delayed. In this event, the Government may take over the work and complete it by contract or otherwise, and may take possession of and use any materials, appliances, and plant on the work site necessary for completing the work. The Contractor and its sureties shall be liable for any damage to the Government resulting from the Contractor's refusal or failure to complete the work within the specified time, whether or not the Contractor's right to proceed with the work is terminated. This liability includes any increased costs incurred by the Government in completing the work.

(b) The Contractor's right to proceed shall not be terminated nor the Contractor charged with damages under this clause, if—

(1) The delay in completing the work arises from unforeseeable causes beyond the control and without the fault or negligence of the Contractor. Examples of such causes include (i) acts of God or of the public enemy, (ii) acts of the Government in either its sovereign or contractual capacity, (iii) acts of another Contractor in the performance of a contract with the Government, (iv) fires, (v) floods, (vi) epidemics, (vii) quarantine restrictions, (viii) strikes, (ix) freight embargoes, (x) unusually severe weather, or (xi) delays of subcontractors or suppliers at any tier arising from unforeseeable causes beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and

(2) The Contractor, within 10 days from the beginning of any delay (unless extended by the Contracting Officer), notifies the Contracting Officer in writing of the causes of delay. The Contracting Officer shall ascertain the facts and the extent of delay. If, in the judgment of the Contracting Officer, the findings of fact warrant such action, the time for completing the work shall be extended. The findings of the Contracting Officer shall be final and conclusive on the parties, but subject to appeal under the Disputes clause.

(c) If, after termination of the Contractor's right to proceed, it is determined that the Contractor was not in default, or that the delay was excusable, the rights and obligations of the parties will be the same as if the termination had been issued for the convenience of the Government.

(d) The rights and remedies of the Government in this clause are in addition to any other rights and remedies provided by law or under this contract.

(End of clause)

Alternate I
(APR 1984). If the contract is for dismantling, demolition, or removal of improvements, substitute the following paragraph (a) for paragraph (a) of the basic clause:

(a)(1) If the Contractor refuses or fails to prosecute the work, or any separable part, with the diligence that will insure its completion within the time specified in this contract, including any extension, or fails to complete the work within this time, the Government may, by written notice to the Contractor, terminate the right to proceed with the work or the part of the work that has been delayed. In this event, the Government may take over the work and complete it by contract or otherwise, and may take possession of and use any materials, appliances, and plant on the work site necessary for completing the work.

(2) If title to property is vested in the Contractor under this contract, it shall revest in the Government regardless of any other clause of this contract, except for property that the Contractor has disposed of by bona fide sale or removed from the site.

(3) The Contractor and its sureties shall be liable for any damage to the Government resulting from the Contractor's refusal or failure to complete the work within the specified time, whether or not the Contractor's right to proceed with the work is terminated. This liability includes any increased costs incurred by the Government in completing the work.

Alternate II
(APR 1984). If the contract is to be awarded during a period of national emergency, subparagraph (b)(1) below may be substituted for subparagraph (b)(1) of the basic clause:

(1) The delay in completing the work arises from causes other than normal weather beyond the control and without the fault or negligence of the Contractor. Examples of such causes include (i) acts of God or of the public enemy, (ii) acts of the Government in either its sovereign or contractual capacity, (iii) acts of another Contractor in the performance of a contract with the Government, (iv) fires, (v) floods, (vi) epidemics, (vii) quarantine restrictions, (viii) strikes, (ix) freight embargoes, (x) unusually severe weather, or (xi) delays of subcontractors or suppliers at any tier arising from causes other than normal weather beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and

Alternate III
(APR 1984). If the contract is for dismantling, demolition, or removal of improvements and is to be awarded during a period of national emergency, substitute the following paragraph (a) for paragraph (a) of the basic clause. The following subparagraph (b)(1) may be substituted for subparagraph (b)(1) of the basic clause:

(a)(1) If the Contractor refuses or fails to prosecute the work, or any separable part, with the diligence that will insure its completion within the time specified in this contract, including any extension, or fails to complete the work within this time, the Government may, by written notice to the Contractor, terminate the right to proceed with the work or the part of the work that has been delayed. In this event, the Government may take over the work and complete it by contract or otherwise, and may take possession of and use any materials, appliances, and plant on the work site necessary for completing the work.

(2) If title to property is vested in the Contractor under this contract, it shall revest in the Government regardless of any other clause of this contract, except for property that the Contractor has disposed of by bona fide sale or removed from the site.

(3) The Contractor and its sureties shall be liable for any damage to the Government resulting from the Contractor's refusal or failure to complete the work within the specified time, whether or not the Contractor's right to proceed with the work is terminated. This liability includes any increased costs incurred by the Government in completing the work.

(b) The Contractor's right to proceed shall not be terminated nor the Contractor charged with damages under this this clause, if—

(1) The delay in completing the work arises from causes other than normal weather beyond the control and without the fault or negligence of the Contractor. Examples of such causes include (i) acts of God or of the public enemy, (ii) acts of the Government in either its sovereign or contractual capacity, (iii) acts of another Contractor in the performance of a contract with the Government, (iv) fires, (v) floods, (vi) epidemics, (vii) quarantine restrictions, (viii) strikes, (ix) freight embargoes, (x) unusually severe weather, or (xi) delays of subcontractors or suppliers at any tier arising from causes other than normal weather beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and

[48 FR 42478, Sept. 19, 1983, as amended at 60 FR 34762, July 3, 1995]
49.504(c)
(c)
(1) Construction. The contracting officer shall insert the clause at 52.249-10, Default (Fixed-Price Construction), in solicitations and contracts for construction, when a fixed-price contract is contemplated and the contract amount is expected to exceed the simplified acquisition threshold. The contracting officer may use the clause when the contract amount is at or below the simplified acquisition threshold, if appropriate (e.g., if completion dates are essential).

(2) Dismantling and demolition. If the contract is for dismantling, demolition, or removal of improvements, the contracting officer shall use the clause with its AlternateI.

(3) National emergencies. If the contract is to be awarded during a period of national emergency, the contracting officer may use the clause-

(i) With its AlternateII when a fixed-price contract for construction is contemplated, or

(ii) With its AlternateIII when a contract for dismantling, demolition, or removal of improvements is contemplated.
Prescription data sourced from eCFR as of 2026-06-10 03:16 UTC. Cross-references within the prescription are not resolved automatically.

Regulatory Stack

The layers of regulation that govern this clause, from the FAR prescription through agency-specific supplements and any active deviations.

RFO RFO Version Overhauled clause text
The Revolutionary FAR Overhaul publishes a revised version of this clause. See the RFO Version tab for the controlling authority under the RFO model.

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FAR FAR Prescription 49.504(c)
(c)
(1) Construction. The contracting officer shall insert the clause at 52.249-10, Default (Fixed-Price Construction), in solicitations and contracts for construction, when a fixed-price contract is contemplated and the contract amount is expected to exceed the simplified acquisition threshold. The contracting officer may use the clause when the contract amount is at or below the simplified acquisition threshold, if appropriate (e.g., if completion dates are essential).

(2) Dismantling and demolition. If the contract is for dismantling, demolition, or removal of improvements, the contracting officer shall use the clause with its AlternateI.

(3) National emergencies. If the contract is to be awarded during a period of national emergency, the contracting officer may use the clause-

(i) With its AlternateII when a fixed-price contract for construction is contemplated, or

(ii) With its AlternateIII when a contract for dismantling, demolition, or removal of improvements is contemplated.

View on acquisition.gov · View on eCFR.gov

Version History

Version history is sourced from the codified eCFR. Changes published only as class deviations or by the Revolutionary FAR Overhaul do not appear here until they are incorporated into the eCFR. For RFO-driven changes see the RFO Version tab and any active deviations cited above.

No version history available from eCFR.

RFO Version

Comparison of the codified eCFR text against the Revolutionary FAR Overhaul revision. Highlights show additions (green) and deletions (red, struck through).

Clause Text

Substantive changes. The RFO version differs materially from the eCFR text.
eCFR (codified)
RFO (implemented)
Unchanged
52.249-10 Default (Fixed-Price Construction).
eCFR (codified)
RFO (implemented)
1 added, 87 removed
(1)
(1) The delay in completing the work arises from unforeseeable causes beyond the control and without the fault or negligence of the Contractor. Examples of such causes include (i) acts of God or of the public enemy, (ii) acts of the Government in either its sovereign or contractual capacity, (iii) acts of another Contractor in the performance of a contract with the Government, (iv) fires, (v) floods, (vi) epidemics, (vii) quarantine restrictions, (viii) strikes, (ix) freight embargoes, (x) unusually severe weather, or (xi) delays of subcontractors or suppliers at any tier arising from unforeseeable causes beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and
(1)
(1) The delay in completing the work arises from unforeseeable causes beyond the control and without the fault or negligence of the Contractor. Examples of such causes include-
9 added
(i)
(i)
(i) Acts of God or of the public enemy;
12 added
(ii)
(ii)
(ii) Acts of the Government in either its sovereign or contractual capacity;
14 added
(iii)
(iii)
(iii) Acts of another Contractor in the performance of a contract with the Government;
2 added
(iv)
(iv)
(iv) Fires;
2 added
(v)
(v)
(v) Floods;
2 added
(vi)
(vi)
(vi) Epidemics;
3 added
(vii)
(vii)
(vii) Quarantine restrictions;
2 added
(viii)
(viii)
(viii) Strikes;
3 added
(ix)
(ix)
(ix) Freight embargoes;
5 added
(x)
(x)
(x) Unusually severe weather; or
32 added
(xi)
(xi)
(xi) Delays of subcontractors or suppliers at any tier arising from unforeseeable causes beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and
2 added, 2 removed
Alternate II (APR 1984). If the contract is to be awarded during a period of national emergency, subparagraph (b)(1) below may be substituted for subparagraph (b)(1) of the basic clause:
Alternate II (Apr 1984). If the contract is to be awarded during a period of national emergency, paragraph (b)(1) below may be substituted for paragraph (b)(1) of the basic clause:
1 added, 90 removed
(1)
(1) The delay in completing the work arises from causes other than normal weather beyond the control and without the fault or negligence of the Contractor. Examples of such causes include (i) acts of God or of the public enemy, (ii) acts of the Government in either its sovereign or contractual capacity, (iii) acts of another Contractor in the performance of a contract with the Government, (iv) fires, (v) floods, (vi) epidemics, (vii) quarantine restrictions, (viii) strikes, (ix) freight embargoes, (x) unusually severe weather, or (xi) delays of subcontractors or suppliers at any tier arising from causes other than normal weather beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and
(1)
(1) The delay in completing the work arises from causes other than normal weather beyond the control and without the fault or negligence of the Contractor. Examples of such causes include-
6 added, 49 removed
(i)
Alternate III (APR 1984). If the contract is for dismantling, demolition, or removal of improvements and is to be awarded during a period of national emergency, substitute the following paragraph (a) for paragraph (a) of the basic clause. The following subparagraph (b)(1) may be substituted for subparagraph (b)(1) of the basic clause:
(i)
(i) Acts of God or of the public enemy;
12 added
(ii)
(ii)
(ii) Acts of the Government in either its sovereign or contractual capacity;
14 added
(iii)
(iii)
(iii) Acts of another Contractor in the performance of a contract with the Government;
2 added
(iv)
(iv)
(iv) Fires;
2 added
(v)
(v)
(v) Floods;
2 added
(vi)
(vi)
(vi) Epidemics;
3 added
(vii)
(vii)
(vii) Quarantine restrictions;
2 added
(viii)
(viii)
(viii) Strikes;
3 added
(ix)
(ix)
(ix) Freight embargoes;
5 added
(x)
(x)
(x) Unusually severe weather; or
35 added
(xi)
(xi)
(xi) Delays of subcontractors or suppliers at any tier arising from causes other than normal weather beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and
52 added
Alternate III (Apr 1984). If the contract is for dismantling, demolition, or removal of improvements and is to be awarded during a period of national emergency, substitute the following paragraph (a) for paragraph (a) of the basic clause. The following paragraph (b)(1) may be substituted for paragraph (b)(1) of the basic clause:
2 added, 3 removed
(b)
(b) The Contractor's right to proceed shall not be terminated nor the Contractor charged with damages under this this clause, if—
(b)
(b) The Contractor’s right to proceed shall not be terminated nor the Contractor charged with damages under this clause, if-
1 added, 90 removed
(1)
(1) The delay in completing the work arises from causes other than normal weather beyond the control and without the fault or negligence of the Contractor. Examples of such causes include (i) acts of God or of the public enemy, (ii) acts of the Government in either its sovereign or contractual capacity, (iii) acts of another Contractor in the performance of a contract with the Government, (iv) fires, (v) floods, (vi) epidemics, (vii) quarantine restrictions, (viii) strikes, (ix) freight embargoes, (x) unusually severe weather, or (xi) delays of subcontractors or suppliers at any tier arising from causes other than normal weather beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and
(1)
(1) The delay in completing the work arises from causes other than normal weather beyond the control and without the fault or negligence of the Contractor. Examples of such causes include-
9 added, 15 removed
(i)
[48 FR 42478, Sept. 19, 1983, as amended at 60 FR 34762, July 3, 1995]
(i)
(i) Acts of God or of the public enemy;
12 added
(ii)
(ii)
(ii) Acts of the Government in either its sovereign or contractual capacity;
14 added
(iii)
(iii)
(iii) Acts of another Contractor in the performance of a contract with the Government;
2 added
(iv)
(iv)
(iv) Fires;
2 added
(v)
(v)
(v) Floods;
2 added
(vi)
(vi)
(vi) Epidemics;
3 added
(vii)
(vii)
(vii) Quarantine restrictions;
2 added
(viii)
(viii)
(viii) Strikes;
3 added
(ix)
(ix)
(ix) Freight embargoes;
5 added
(x)
(x)
(x) Unusually severe weather; or
35 added
(xi)
(xi)
(xi) Delays of subcontractors or suppliers at any tier arising from causes other than normal weather beyond the control and without the fault or negligence of both the Contractor and the subcontractors or suppliers; and

Prescription

Substantive changes. The RFO prescription differs materially from the eCFR prescription.
eCFR (codified)
RFO (implemented)
Unchanged
52.249-10 Default (Fixed-Price Construction).: Prescription
eCFR (codified)
RFO (implemented)
5 added, 10 removed
(c)
(c) (1) Construction. The contracting officer shall insert the clause at 52.249-10, Default (Fixed-Price Construction), in solicitations and contracts for construction, when a fixed-price contract is contemplated and the contract amount is expected to exceed the simplified acquisition threshold. The contracting officer may use the clause when the contract amount is at or below the simplified acquisition threshold, if appropriate (e.g., if completion dates are essential).
(c)
(1) Construction. Insert the clause at 52.249-10, Default (Fixed-Price Construction), in solicitations and contracts for construction when a fixed price contract is contemplated, and the amount is expected to exceed the simplified acquisition threshold. The contracting officer may use the clause when the contract amount is at or below the simplified acquisition threshold, if appropriate (e.g., if completion dates are essential.)
25 removed
(2)
(2) Dismantling and demolition. If the contract is for dismantling, demolition, or removal of improvements, the contracting officer shall use the clause with its AlternateI.
(2)
23 removed
(3)
(3) National emergencies. If the contract is to be awarded during a period of national emergency, the contracting officer may use the clause-
(3)
13 removed
(i)
(i) With its AlternateII when a fixed-price contract for construction is contemplated, or
(i)
16 removed
(ii)
(ii) With its AlternateIII when a contract for dismantling, demolition, or removal of improvements is contemplated.
(ii)

Source: acquisition.gov RFO Part 52 · Prescribing Part 49

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