Document:

A. O. SMITH CORPORATION
                       EXECUTIVE SUPPLEMENTAL PENSION PLAN

                             AS AMENDED AND RESTATED
                            EFFECTIVE JANUARY 1, 2001

Section 1. Purpose

          The purpose of this Plan is to provide a pension plan supplement for
certain key executives of the Company. This Plan, effective January 1, 2001,
applies only to Executives who are in active employment with the Company on or
after such date.

          This plan is an amendment and restatement of the A. O. Smith
Corporation Supplemental Benefit Plan, dated December 14, 1993, and is a
continuation of the pension plan supplement part of that plan. The profit
sharing supplement part of that plan was continued under the A. O. Smith
Corporation Supplemental Profit Sharing Plan, effective January 1, 2001.

Section 2.  Definitions

          (a) "Affiliate" a domestic subsidiary or affiliated company of A. O.
Smith Corporation which has been designated as being eligible to participate in
the Plan by the Committee.

          (b) "Average Monthly Earnings" means the monthly average in the five
(5) Plan Years (of the most recent ten (10) Plan Years prior to termination of
employment) in which the greatest Earnings were received.

          (c) "Company" means A. O. Smith Corporation.

          (d) "Committee" means the Personnel and Compensation Committee of the
Board of Directors of the Company.

          (e) "Earnings" shall mean the total of all wages, salaries,
commissions and bonuses paid to the Executive, including any deferred
compensation or salary reduction amounts pursuant to Section 125 and 401(k) of
the Internal Revenue Code.

          (f) "Executive" means an employee of the Company or an Affiliate with
a position which is assigned Grade 23 or above and who is entitled to a deferred
vested or retirement benefit in the Pension Plan.

          (g) "Pension Plan" means the A. O. Smith Retirement Plan.

          (h) "Plan Year" means the calendar year.
<PAGE>
Section 3.  Pension Plan Supplement

          (a) An Executive may be entitled to receive a monthly Pension Plan
supplement (the "Pension Plan Supplement") from the Company under this Plan. The
formula for calculation of the monthly Pension Plan Supplement, if any, which an
Executive may receive is as follows:

          (1)  1.65% of the Executive's Average Monthly Earnings multiplied by
               the number of years of Credited Service (as defined in the
               Pension Plan), but not more than forty (40) years;

          (2)  reduced by any applicable reduction factors for early retirement
               in the Pension Plan;

          (3)  minus the total monthly retirement or deferred vested benefit
               actually payable to the Executive from the Pension Plan; and

          (4)  minus the benefit that the Executive is entitled to under the A.
               O. Smith Corporation Executive Life Insurance Plan.

          (b) The monthly Pension Plan Supplement shall be paid to the Executive
in each calendar month the Executive actually receives a retirement or deferred
vested benefit from the Pension Plan in the same form elected under the Pension
Plan. The Pension Plan Supplement shall cease on the date of the cessation of
Pension Plan benefits to the Executive or any beneficiaries thereof.

          (c) In the event survivor benefits are payable to beneficiaries of the
Executive from the Pension Plan, the Company shall pay a monthly supplement to
the same beneficiaries equal in the aggregate to the Pension Plan Supplement,
provided however, that any such supplemental beneficiary payments shall be
reduced to reflect the joint and survivor benefit option election made by the
Executive and in effect under the Pension Plan. In no event shall a benefit be
paid under this Plan to a beneficiary of an Executive if the Executive dies
prior to beginning receipt of his payments under the Pension Plan.

Section 4.  Unfunded Plan

          The rights of the Executive or an Executive's beneficiary under the
Plan shall be solely those of an unsecured creditor of the Company. The Company
shall not be required to set aside any assets with respect to the Plan and any
assets actually held by the Company with reference to the Plan shall be the sole
property of the Company. Neither the Executive nor an Executive's beneficiaries,
heirs, legal representatives, or assigns shall have ownership rights of any
nature with respect to any assets set aside for the Plan, unless and until such
time as such assets are paid over and transferred to the Executive or the
Executive's beneficiaries under the terms of the Plan.

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<PAGE>
Section 5.  Non-Alienation of Benefits

          Neither an Executive nor his designated beneficiaries shall have the
power to transfer, assign, anticipate or otherwise encumber in advance the
payments provided in this Plan; nor shall any of said payments, nor any assets
or funds of the Company or any Affiliate be subject to seizure for the payment
of any of the Executive's or his beneficiaries' judgments, alimony or separate
maintenance or be reached or transferred by operation of law in the event of the
bankruptcy or insolvency of the Executive or any beneficiary.

Section 6.  Administration

          The Committee shall have all such powers that may be necessary to
carry out the provisions of the Plan, including without limitation, the
discretionary power and authority to delegate administrative matters to other
persons, to construe and interpret the Plan, to adopt and revise rules,
regulations and forms relating to and consistent with the Plan's terms, to
select the actuarial factors to be used, to make all other benefit
determinations, and to make any other determination which it deems necessary or
advisable for the implementation and administration of the Plan. Subject to the
foregoing, all decisions and determinations by the Committee shall be final,
binding and conclusive as to all parties, including without limitation any
Executive and all other employees and persons, unless arbitrary and capricious.

Section 7.  Appeals Procedures

          (a) If an Executive (or beneficiary) believes he is entitled to a
benefit hereunder that was not provided, the Executive or beneficiary
(hereinafter referred to as the "claimant") shall file a written claim for such
benefit with the Committee. If for any reason a claim for benefits under this
Plan is denied by the Committee, the Committee shall deliver to the claimant a
written explanation setting forth the specific reasons for the denial, pertinent
references to the section of the Plan on which the denial is based, a
description of such other data as may be pertinent to the claim review, and
information on the procedures to be followed by the claimant in obtaining a
review of his claim and his right to file a civil suit pursuant to ERISA section
502, all written in a manner calculated to be understood by the claimant. For
this purpose, the claimant's claim shall be deemed filed when presented in
writing to the Committee, and the Committee's explanation shall be in writing
delivered to the claimant within ninety (90) days of the date the claim is
filed.

          (b) The claimant shall have sixty (60) days following his receipt of
the denial of the claim to file with the Committee a written request for review
of the denial. For such review, the claimant or his representative may review
pertinent documents and submit written issues and comments. The Committee shall
decide the issue on review and furnish the claimant with a copy of its decision
within sixty (60) days of receipt of the claimant's request for review of his
claim. The decision on review shall be final and binding and in writing and
shall include specific reasons for the decision, written in a manner calculated
to be understood by the claimant, as well as specific references to the
pertinent provisions of the Plan on which the

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<PAGE>

decision is based, a statement that the claimant is entitled to receive copies
of, or access to, pertinent documents, and a statement that the claimant is
entitled to bring an action under ERISA section 502. If a copy of the decision
is not so furnished to the claimant within such sixty (60) days, the claim shall
be deemed denied on review.

Section 8.  Limitation of Rights Against the Company

          Participation in this Plan, or any modifications thereof, or the
payments of any benefits hereunder, shall not be construed as giving to any
Executive any right to be retained in the service of the Company, limiting in
any way the right of the Company to terminate such Executive's employment at any
time, evidencing any agreement or understanding, express or implied, that the
Company will employ such Executive in any particular position or at any
particular rate of compensation and/or guaranteeing such Executive any right to
receive any other form or amount of remuneration from the Company.

Section 9.  Construction

          The Plan shall be construed, administered and governed in all respects
under and by the laws of the State of Wisconsin, without reference to conflict
of law principles thereof. Wherever any words are used herein in the masculine,
they shall be construed as though they were used in the feminine for all cases
where they would so apply; and wherever any words are used herein in the
singular or the plural, they shall be construed as though they were used in the
plural or the singular, as the case may be, in all cases where they would so
apply. The words "hereof', "herein" and "hereunder" and other similar compounds
of the word "here" shall mean and refer to this entire document and not to any
particular paragraph.

Section 10.  Amendment or Termination of the Plan

          The Committee shall have the right to amend, modify, terminate or
discontinue the Plan at any time; and such action shall be final, binding and
conclusive as to all parties, including any Executive, any beneficiary thereof
and all other employees and persons. Notwithstanding the foregoing, any such
Committee action to terminate or discontinue the Plan or to change the payment
amounts or the time and manner of payment thereof as then provided in the Plan
shall not be effective and operative with respect to benefits accrued as of such
date, unless and until written consent thereto is obtained from each Executive
affected by such action or, if any such Executive is not then living, from the
beneficiary thereof.

Section 11.  Relationship to Employment Agreements

          Except as otherwise expressly provided herein, the Plan does not
affect the rights of the Executive under any employment or other compensation
agreement with the Company covering an Executive.

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<PAGE>

Section 12.  Successors and Assigns

          The terms and conditions of the Plan, as amended and in effect from
time to time, shall be binding upon the successors and assigns of the Company,
including without limitation any entity into which the Company may be merged or
with which the Company may be consolidated.

                                       5A. O. SMITH CORPORATION
                        SUPPLEMENTAL Profit Sharing PLAn

                            EFFECTIVE JANUARY 1, 2001

Section 1.  Purpose

          The purpose of the A. O Smith Corporation Supplemental Profit Sharing
Plan ("the Plan") is to provide a profit sharing plan supplement for certain key
employees of the Company and its Affiliates who are subject to any reduction in
Company Matching Contributions from the A. O. Smith Profit Sharing Retirement
Plan due to the restrictions of Section 401(a)(17), on covered compensation or
due to the maximum limitation on contributions under Sections 401(k), and
401(m), or 402(g) of the Internal Revenue Code

          This Plan is a continuation of the profit sharing supplement part
("Reserve Account I") of the A. O. Smith Corporation Supplemental Benefit Plan,
dated December 14, 1993. The A. O. Smith Corporation Supplemental Benefit Plan
has been amended and restated effective January 1, 2001 and renamed the A. O.
Smith Corporation Executive Supplemental Pension Plan.

Section 2.  Definitions

          (a) "Affiliate" a domestic subsidiary or affiliated company of A. O.
Smith Corporation which has been designated as being eligible to participate in
the Plan by the Committee.

          (b) "Company" means A. O. Smith Corporation

          (c) "Company Matching Contribution" shall have the same meaning as set
forth in the Qualified Plan.

          (d) "Committee" means the Personnel and Compensation Committee of the
Board of Directors of the Company.

          (e) "Crediting Election" means the investment fund(s) selected by the
Employee to be used as the basis for calculation of the rate of return
equivalent for the Employee's Profit Sharing Account. An Employee's Crediting
Election may be changed on a daily basis.

          (f) "Eligible Tax Deferred Employee Contribution" shall have the same
meaning as set forth in the Qualified Plan

          (g) "Employee" means any employee of the Company or an Affiliate who
is assigned Grade 21 or above and whose Company Matching Contribution in the A.
O. Smith Profit Sharing Retirement Plan is limited by application of the
Sections 401(a)(17), 402(g), 401(k) or 401(m) of the Internal Revenue Code.
<PAGE>

          (h) "Plan Year" means the calendar year.

          (i) ""Profit Sharing Account" means the bookkeeping reserve account
(formerly named Reserve Account I) for each Employee to identify the applicable
profit sharing supplement under this Plan.

          (j) "Qualified Plan" means the A. O. Smith Profit Sharing Retirement
Plan.

Section 3.  Profit Sharing Plan Supplement

          The Company shall establish a Profit Sharing Account for each Employee
to identify the value of the applicable supplement from time to time. To be
eligible for a credit to the Profit Sharing Account for a Plan Year, the
Employee must contribute the maximum Eligible Tax-Deferred Employee
Contributions allowed by law to the Qualified Plan. As of each December 31st,
the amount to be credited to the Employee's Profit Sharing Account shall be
equal to the difference between (a) and (b):

          (a) The Company Matching Contribution the Employee would have been
entitled to from the Qualified Plan in the Plan Year assuming the Employee had
made the maximum Eligible Tax-Deferred Employee Contributions for such Plan Year
without the application of the restrictions in Sections 401(a)(17) on covered
compensation or the limitations on contributions under Sections 401(k), 401(m)
and 402(g) of the Internal Revenue Code, and

          (b) The actual Company Matching Contribution allocable to the account
of the Employee for such Plan Year in the Qualified Plan.

For purposes of determining the Company Matching Contribution under (a) above,
an Employee's compensation shall include the amount of any base salary which the
Employee has chosen to defer for such year under any deferred compensation
arrangement of the Company. The amount of the supplement determined under this
Section 3 shall be credited to the Employee's Profit Sharing Account on January
31st of each Plan Year following the Plan Year in which the supplement is
earned.

Section 4.  Vesting

          An Employee shall vest in the amounts allocated to the Profit Sharing
Account under the same vesting rules set forth in Article IX of the Qualified
Plan.

Section 5.  Profit Sharing Account

          (a) As of the last day of each calendar month, an additional amount
shall be credited or debited against the Employee's Profit Sharing Account based
on the rate of return of the Employee's Crediting Election. The Committee shall
select a minimum of four investment funds to be used to determine the rate of
return equivalent on the Employee's Profit Sharing Account.

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<PAGE>

          (b) Subject to an alternative election described below, payment of the
vested amounts credited to the Profit Sharing Account for each Employee shall
commence during the month of January immediately following the Employee's
termination of employment with the Company and shall be made in fifteen (15)
annual installments, subject to a minimum annual installment amount of $5,000 or
such higher amount determined in the discretion of the Committee and uniformly
applicable to all Employees. The first such installment shall equal the vested
value of the Profit Sharing Account as of the date of distribution divided by
fifteen (15). Each subsequent installment shall equal the remaining value of the
Profit Sharing Account, including earnings (or losses) as of the date of such
distribution divided by the number of remaining installment payments.
Notwithstanding the foregoing, on or prior to December 31st of the calendar year
preceding the Employee's termination of employment, the Employee may elect by
written instrument delivered to the Committee that the number of annual
installment periods be any whole number less than fifteen (15); in any such
case, the method of determining the distributable amount each year shall be
correspondingly adjusted.

          (c) In the event of an Employee's death either before or after
benefits hereunder have commenced to him, any amount remaining allocated to the
Profit Sharing Account shall be paid to such beneficiary or beneficiaries as the
Employee shall designate by written instrument delivered to the Committee, or if
no such written instrument is properly delivered or if such designated
beneficiary predeceases the Employee, to the executors, administrators, or
personal representatives of the Employee's estate. Any installment payments
previously commenced to the Employee shall continue to such beneficiary. In the
event no distributions had been made to the Employee prior to his death,
installment payments shall commence thereafter to the beneficiary as provided in
subsection (b) above.

          (d) The Profit Sharing Account shall be utilized solely as a device
for the measurement and determination of the amount to be paid to an Employee at
the times specified above for the payment of the accumulated value of
supplemental profit sharing benefits under this Plan. The rights of the Employee
or an Employee's beneficiary under the Plan shall be solely those of an
unsecured creditor of the Company. Neither the Profit Sharing Account nor any
other reserve established on the Company's books to reflect the liabilities
under this Plan shall constitute or be treated as a trust fund of any kind. On
the contrary, it is expressly agreed and understood that the Company shall not
be required to set aside any assets with respect hereto and that any assets
actually held by the Company with reference to this Plan shall be and remain the
sole property of the Company, and that neither an Employee nor an Employee's
beneficiaries, heirs, legal representatives or assigns shall have ownership
rights of any nature with respect thereto, unless and until such time as such
assets are paid over and transferred to the Employee or the Employee's
beneficiaries, as herein provided.

Section 6.  Non-Alienation of Benefits

          Neither an Employee nor his designated beneficiaries shall have the
power to transfer, assign, anticipate or otherwise encumber in advance any of
the payments provided in this Plan; nor shall any of said payments, nor any
assets or funds of the Company be subject to seizure for the payment of any of
the Employee's or his beneficiaries' judgments, alimony or separate

                                       3
<PAGE>

maintenance or be reached or transferred by operation of law in the event of the
bankruptcy or insolvency of the Employee or any beneficiary.

Section 7.  Administration

          The Committee shall have all such powers that may be necessary to
carry out the provisions of the Plan, including without limitation, the
discretionary power and authority to delegate administrative matters to other
persons, to construe and interpret the Plan, determine benefits, to adopt and
revise rules, regulations and forms relating to and consistent with the Plan's
terms and to make any other determination which it deems necessary or advisable
for the implementation and administration of the Plan. Subject to the foregoing,
all decisions and determinations by the Committee shall be final, binding and
conclusive as to all parties, including without limitation any Employee and all
other persons unless, arbitrary and capricious.

Section 8.  Appeals Procedures

          (a) If an Employee (or beneficiary) believes he is entitled to a
benefit hereunder that was not provided, the Employee or beneficiary
(hereinafter referred to as the "claimant") shall file a written claim for such
benefit with the Committee. If for any reason a claim for benefits under this
Plan is denied by the Committee, the Committee shall deliver to the claimant a
written explanation setting forth the specific reasons for the denial, pertinent
references to the section of the Plan on which the denial is based, a
description of such other data as may be pertinent to the claim review, and
information on the procedures to be followed by the claimant in obtaining a
review of his claim, and his right to file a civil suit pursuant to ERISA
Section 502, all written in a manner calculated to be understood by the
claimant. For this purpose, the claimant's claim shall be deemed filed when
presented in writing to the Committee, and the Committee's explanation shall be
in writing delivered to the claimant within ninety (90) days of the date the
claim is filed.

          (b) The claimant shall have sixty (60) days following his receipt of
the denial of the claim to file with the Committee a written request for review
of the denial. For such review, the claimant or his representative may review
pertinent documents and submit written issues and comments. The Committee shall
decide the issue on review and furnish the claimant with a copy of its decision
within sixty (60) days of receipt of the claimant's request for review of his
claim. The decision on review shall be final and binding and in writing and
shall include specific reasons for the decision, written in a manner calculated
to be understood by the claimant, as well as specific references to the
pertinent provisions of the Plan on which the decision is based. If a copy of
the decision is not so furnished to the claimant within such sixty (60) days,
the claim shall be deemed denied on review.

Section 9.  Limitation of Rights Against the Company

          Participation in this Plan, or any modifications thereof, or the
payments of any benefits hereunder, shall not be construed as giving to any
Employee any right to be retained in the service of the Company, limiting in any
way the right of the Company to terminate such

                                       4
<PAGE>

Employee's employment at any time, evidencing any agreement or understanding,
express or implied, that the such Employee will be employed in any particular
position or at any particular rate of compensation and/or guaranteeing such
Employee any right to receive any other form or amount of remuneration from the
Company.

Section 10.  Construction

          The Plan shall be construed, administered and governed in all respects
under and by the laws of the State of Wisconsin, without reference to conflict
of law principles thereof. Wherever any words are used herein in the masculine,
they shall be construed as though they were used in the feminine for all cases
where they would so apply; and wherever any words are used herein in the
singular or the plural, they shall be construed as though they were used in the
plural or the singular, as the case may be, in all cases where they would so
apply. The words "hereof', "herein" and "hereunder" and other similar compounds
of the word "here" shall mean and refer to this entire document and not to any
particular paragraph.

Section 11.  Amendment or Termination of the Plan

          The Committee shall have the right to amend, modify, terminate or
discontinue the Plan at any time; and such action shall be final, binding and
conclusive as to all parties, including any Employee, any beneficiary thereof
and all other persons. Notwithstanding the foregoing, any such Committee action
to terminate or discontinue the Plan or to change the payment amounts or the
time and manner of payment thereof as then provided in the Plan shall not be
effective and operative with respect to amounts allocated to the Profit Sharing
Account as of such date, unless and until written consent thereto is obtained
from each Employee affected by such action or, if any such Employee is not then
living, from the beneficiary thereof.

Section 12.  Relationship to Employment Agreements

          Except as otherwise expressly provided herein, the Plan does not
affect the rights of the Employee under any employment or other compensation
agreement with the Company or any Affiliate.

Section 13.  Successors and Assigns

         The terms and conditions of the Plan, as amended and in effect from
time to time shall be binding upon the successors and assigns of the Company.

                                       5

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