<PAGE>   1
                 EIGHTH AMENDMENT TO LETTER OF CREDIT AGREEMENT
                 ----------------------------------------------


            EIGHTH AMENDMENT (the "Amendment"), dated as of June 23, 1997, among
The LTV Corporation, a Delaware corporation ("LTV"), LTV Steel Company, Inc., a
New Jersey corporation ("LTVSC"), LTV Steel Mining Company, a Minnesota limited
partnership ("LTVSM"), LTV Steel Tubular Products Company, a Delaware
corporation ("LTVSTP", and together with LTVSC and LTVSM, the "Borrowers"), the
financial institutions party to the Credit Agreement referred to below (the
"Lenders") and BT Commercial Corporation, acting as Agent (the "Agent") in the
manner and to the extent described in Article 9 of the Credit Agreement referred
to below. All capitalized terms used herein and not otherwise defined shall have
the respective meanings provided such terms in the Credit Agreement.


                              W I T N E S S E T H:
                              - - - - - - - - - -


            WHEREAS, LTV, the Borrowers, the Lenders and the Agent are parties
to a Credit Agreement, dated as of October 12, 1994 (as amended, modified or
supplemented to the date hereof, the "Credit Agreement"); and

            WHEREAS, the parties hereto wish to amend the Credit Agreement as
herein provided;


            1. Section 1.1 of the Credit Agreement is hereby amended by (i)
deleting the reference to "or" in the first parenthetical in the definition of
"Material Subsidiary" and inserting a comma in lieu thereof and (ii) inserting
the following text immediately after the reference to "Interstate Commerce
Commission" in the first parenthetical in the definition of "Material
Subsidiary":

     ", or any Varco Pruden Company".

            2. Section 1.1 of the Credit Agreement is hereby further amended by
inserting therein in the appropriate alphabetical order the following new
definitions:

            "VARCO PRUDEN ASSET PURCHASE AGREEMENT shall mean the Asset Purchase
      Agreement, dated as of May 21, 1997, as amended from time to time, among
      The LTV Corporation, United Dominion Industries, Inc. and United Dominion
      Industries Limited.

            VARCO PRUDEN ASSETS shall mean (i) all or substantially all of the
      assets (which may include certain equity interests) comprising the Varco
      Pruden division and the AEP-Span division of United Dominion Industries,
      Inc., (ii) certain other assets of United Dominion Industries, Inc.'s
      affiliates, including, without limitation equity interests in certain
      joint ventures in China, Brazil (Medabil), Argentina and

<PAGE>   2

      Egypt in which Varco-Pruden International Limited or Span Holdings
      Limited, each a Bahamian corporation and wholly owned subsidiary of United
      Dominion Industries Limited, holds an equity interest, and (iii) other
      assets acquired by any Varco Pruden Company subsequent to the initial
      acquisition pursuant to the Varco Pruden Asset Purchase Agreement.

            VARCO PRUDEN COMPANIES shall mean VP Buildings Inc. and any direct
      or indirect subsidiary thereof which owns any of the Varco Pruden
      Assets.".

            3. Section 7.2 of the Credit Agreement is hereby amended by (i)
deleting the reference to "and" appearing at the end of clause (xiv), (ii)
deleting the period appearing at the end of clause (xv) and inserting "; and "
in lieu thereof and (iii) inserting the following new clause (xvi) at the end
thereof:

            "(xvi) Liens on any Varco Pruden Assets owned by a Varco Pruden
      Company.".

            4. Section 7.3 of the Credit Agreement is hereby amended by (i)
deleting the reference to "and" appearing at the end of clause (xv), (ii)
deleting the period appearing at the end of clause (xvi) and inserting "; and"
in lieu thereof and (iii) inserting the following new clause (xvii) at the end
of thereof:

            "(xvii) any Varco Pruden Company may create, incur, assume or
      guaranty, or otherwise become or remain directly or indirectly liable with
      respect to, any Indebtedness, PROVIDED that such Indebtedness is
      non-recourse to LTV or any Subsidiary of LTV (other than any Varco Pruden
      Company).".

            5. Section 7.6 of the Credit Agreement is hereby amended by deleting
clause (v) in its entirety and inserting the following new clause (v) in lieu
thereof:

            "(v) LTV and its Wholly-Owned Subsidiaries may make and own
      Investments in their respective Wholly-Owned Subsidiaries; PROVIDED that
      (x) LTV and/or its Subsidiaries may make Investments in the Varco Pruden
      Companies in the amount required to accomplish the initial acquisition of
      the Varco Pruden Assets, pursuant to the Varco Pruden Asset Purchase
      Agreement, on the date of the acquisition thereof and (y) the aggregate
      amount of Investments made by LTV and its Subsidiaries after the Closing
      Date pursuant to this clause (v)(y) in (i) Material Subsidiaries which are
      not Credit Parties (other than LTV Finance) (and including Contingent
      Obligations with respect thereto) and (ii) the Varco Pruden Companies
      after the initial Investments therein pursuant to clause (v)(x) above, in
      the case of clauses (v)(y)(i) and (v)(y)(ii) shall not exceed $50,000,000
      at any time;".

            6. Section 7.9 of the Credit Agreement is hereby amended by (i)
deleting the word "and" appearing before clause (ii) therein and (ii) inserting
the following new clause (iii) immediately before the semicolon at the end of
clause (ii): 

                                      -2-
<PAGE>   3

     "and (iii) the lines of business engaged in by the Varco Pruden Companies 
as a result of the initial acquisition by LTV of the Varco Pruden Assets
pursuant to the Varco Pruden Asset Purchase Agreement".

            7. Section 7.16 of the Credit Agreement is hereby amended by
deleting the first proviso appearing therein in its entirety and inserting the
following new proviso in lieu thereof: 

      "provided that if (A) J&L Empire, Inc. incurs non-recourse Indebtedness
      or (B) any Varco Pruden Company incurs Indebtedness (which Indebtedness
      shall be non- recourse to LTV or any Subsidiary of LTV (other than any
      Varco Pruden Company)), as the case may be, that is otherwise permitted
      under this Agreement, the documents pursuant to which such Indebtedness is
      incurred may contain restrictions otherwise prohibited under this Section
      7.16;".

            8. Section 7.19 of the Credit Agreement is hereby amended by
inserting the following new parenthetical immediately after the reference to
"Subsidiaries" in the last sentence therein:

      "(other than a Varco Pruden Company)".

            9. In order to induce the undersigned . Lenders to enter into this
Amendment, LTV and the Borrowers hereby represent and warrant that:

            (a) No Default or Event of Default exists as of the Eighth Amendment
      Effective Date and after giving effect to this Amendment;

            (b) On the Eighth Amendment Effective Date after giving effect to
      this Amendment, all representations and warranties contained in the Credit
      Agreement and the other Credit Documents are true and correct in all
      material respects; and

            (c) On and after the Eighth Amendment Effective Date, this
      Amendment, and the transactions permitted hereby, shall be permitted by,
      and shall not violate any material term of or cause a breach of, any of
      the Related Agreements.

            10. This Amendment is limited as specified and shall not constitute
a modification, acceptance or waiver of any other provision of the Credit
Agreement or any other Credit Document.

            11. This Amendment may be executed in any number of counterparts and
by the different parties hereto on separate counterparts, each of which
counterparts when executed and delivered shall be an original, but all of which
shall together constitute one and the same instrument. A complete set of
counterparts shall be lodged with LTV, the Borrowers and the Agent. 

                                      -3-
<PAGE>   4


            12. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE
STATE OF NEW YORK.

            13. This Amendment shall become effective on the date (the "Eighth
Amendment Effective Date") on which LTV, the Borrowers and the Required Lenders
shall have signed a copy hereof (whether the same or different copies) and shall
have delivered (including by way of facsimile device) the same to the Agent.

            14. From and after the Eighth Amendment Effective Date, all
references in the Credit Agreement and each of the Credit Documents to the
Credit Agreement shall be deemed to be references to such Credit Agreement as
amended hereby. 



                                  *    *    *






                                      -4-

<PAGE>   5

            IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be executed and delivered by their proper and duly authorized officers as of the
date set forth above.


                                        THE LTV CORPORATION


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: J. C. Skurek
                                           Title: Vice President & Treasurer



                                        LTV STEEL COMPANY, INC.


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: J. C. Skurek
                                           Title: Vice President & Treasurer



                                        LTV STEEL MINING CO.

                                        By: Youngstown Erie Corporation


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: J. C. Skurek
                                           Title: Vice President & Treasurer


                                        By: Erie B Corporation


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: J. C. Skurek
                                           Title: Vice President & Treasurer

<PAGE>   6


                                        By: Erie I Corporation


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: J. C. Skurek
                                           Title: Vice President & Treasurer



                                        LTV STEEL TUBULAR PRODUCTS
                                           COMPANY


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: J. C. Skurek
                                           Title: Vice President & Treasurer



                                        BT COMMERCIAL CORPORATION,
                                           individually and as Agent
                                           and Collateral Agent

                                        By: /s/ Bruce W. Addison
                                           -------------------------------------
                                           Name: Bruce W. Addison
                                           Title:  Vice President


                                        THE CHASE MANHATTAN BANK,
                                           as a Lender

                                        By: /s/ James H. Ramage
                                           -------------------------------------
                                           Name: James H. Ramage
                                           Title: Vice President
<PAGE>   7

                                        THE LONG-TERM CREDIT BANK OF
                                           JAPAN, LTD., CHICAGO BRANCH,
                                           as a Lender

                                        By: /s/ Brady S. Sadek
                                           -------------------------------------
                                           Name:  Brady S. Sadek
                                           Title: Vice President & Deputy 
                                                  General Manager 



                                        MELLON BANK N.A., as a Lender



                                        By: /s/ Richard K. James 
                                           -------------------------------------
                                           Name:  Richard K. James
                                           Title: Vice President 



                                        THE SUMITOMO BANK, LTD.,
                                           CHICAGO BRANCH, as a Lender


                                        By: /s/ John Kemper
                                           -------------------------------------
                                           Name: John Kemper
                                           Title: Senior Vice President



                                        PNC BANK NATIONAL ASSOCIATION,
                                           as a Lender



                                        By: /s/ MARK RUTHERFORD
                                           -------------------------------------
                                           Name: MARK RUTHERFORD
                                           Title: Vice-President


                                       
<PAGE>   8

                                        CREDIT LYONNAIS CHICAGO
                                           BRANCH, as a Lender



                                        By: /s/ Julie T. Kanak 
                                           -------------------------------------
                                           Name: Julie T. Kanak
                                           Title: Vice President 



                                        CAISSE NATIONALE DE CREDIT
                                           AGRICOLE, as a Lender


                                        By: /s/ David Bouhl
                                           -------------------------------------
                                           Name: DAVID BOUHL, F.V.P.
                                           Title: HEAD OF CORPORATE BANKING
                                                         CHICAGO



                                        NATIONAL CITY BANK, as a Lender



                                        By: /s/ Davis R. Bonner
                                           -------------------------------------
                                           Name: Davis R. Bonner
                                           Title: Vice President/Senior Lending
                                                  Officer




                                        KEYBANK NATIONAL ASSOCIATION, as a 
                                           Lender



                                        By: /s/ Richard A. Pohle
                                           -------------------------------------
                                           Name:  Richard A. Pohle
                                           Title: Vice President





<PAGE>   9


                 NINTH AMENDMENT TO LETTER OF CREDIT AGREEMENT
                 ---------------------------------------------


            NINTH AMENDMENT (the "Amendment"), dated as of August 28, 1997,
among The LTV Corporation, a Delaware corporation ("LTV"), LTV Steel Company,
Inc., a New Jersey corporation ("LTVSC"), LTV Steel Mining Company, a Minnesota
limited partnership ("LTVSM"), LTV Steel Tubular Products Company, a Delaware
corporation ("LTVSTP", and together with LTVSC and LTVSM, the "Borrowers"), the
financial institutions party to the Credit Agreement referred to below (the
"Lenders") and BT Commercial Corporation, acting as Agent (the "Agent") in the
manner and to the extent described in Article 9 of the Credit Agreement referred
to below. All capitalized terms used herein and not otherwise defined shall have
the respective meanings provided such terms in the Credit Agreement.


                              W I T N E S S E T H:
                              - - - - - - - - - -


            WHEREAS, LTV, the Borrowers, the Lenders and the Agent are parties
to a Credit Agreement, dated as of October 12, 1994 (as amended, modified or
supplemented to the date hereof, the "Credit Agreement"); and

            WHEREAS, the parties hereto wish to amend the Credit Agreement as
herein provided;


            1. Section 7.3 of the Credit Agreement is hereby amended by deleting
the reference to "$150,000,000" in subsection (xv) and inserting "$300,000,000"
in lieu thereof.

            2. Section 7.19 of the Credit Agreement is hereby amended by
inserting the following sentence at the end thereof:

      "Notwithstanding anything to the contrary contained in this Agreement, the
      existence of an "equal and ratable" clause in any indenture or other
      agreement evidencing other Indebtedness shall not in and of itself result
      in a violation of this Section 7.19 and Section 7.2 of the Credit
      Agreement, PROVIDED, HOWEVER, that (i) the existence of such "equal and
      ratable" clause shall not give any of the Credit Parties or any of their
      Subsidiaries the right to create or suffer to exist any Lien on their
      assets that is not otherwise permitted by Section 7.2 of the Credit
      Agreement and (ii) such "equal and ratable" clause shall except from its
      operation the creation or assumption of any Lien on the Collateral with
      respect to this Agreement and any extension, revision, refinancing or
      replacement thereof by a lender or syndicate of lenders.".

            3. In order to induce the undersigned Lenders to enter into this
Amendment, LTV and the Borrowers hereby represent and warrant that:

<PAGE>   10

            (a) No Default or Event of Default exists as of the Ninth Amendment
      Effective Date (as defined below in Section 7), and after giving effect to
      this Amendment;

            (b) On the Ninth Amendment Effective Date after giving effect to
      this Amendment, all representations and warranties contained in the Credit
      Agreement and the other Credit Documents are true and correct in all
      material respects; and

            (c) On and after the Ninth Amendment Effective Date, this Amendment
      shall be permitted by, and shall not violate any material term of or cause
      a breach of, any of the Related Agreements.

            4. This Amendment is limited as specified and shall not constitute a
modification, acceptance or waiver of any other provision of the Credit
Agreement or any other Credit Document.

            5. This Amendment may be executed in any number of counterparts and
by the different parties hereto on separate counterparts, each of which
counterparts when executed and delivered shall be an original, but all of which
shall together constitute one and the same instrument. A complete set of
counterparts shall be lodged with LTV, the Borrowers and the Agent.

            6. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE
STATE OF NEW YORK.

            7. This Amendment shall become effective on the date (the "Ninth
Amendment Effective Date") on which LTV, the Borrowers and the Required Lenders
shall have signed a copy hereof (whether the same or different copies) and shall
have delivered (including by way of facsimile device) the same to the Agent.

            8. From and after the Ninth Amendment Effective Date, all references
in the Credit Agreement and each of the Credit Documents to the Credit Agreement
shall be deemed to be references to such Credit Agreement as amended hereby.

                               *       *       *







                                      -2-


<PAGE>   11

            IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be executed and delivered by their proper and duly authorized officers as of the
date set forth above.


                                        THE LTV CORPORATION


                                        By: /s/ Arthur W. Huge
                                           -------------------------------------
                                           Name: Arthur W. Huge
                                           Title: Senior Vice President and
                                                  Chief Financial Officer



                                        LTV STEEL COMPANY, INC.


                                        By: /s/ Arthur W. Huge
                                           -------------------------------------
                                           Name: Arthur W. Huge
                                           Title: Senior Vice President and
                                                  Chief Financial Officer



                                        LTV STEEL MINING CO.

                                        By: Youngstown Erie Corporation


                                        By: /s/ Arthur W. Huge
                                           -------------------------------------
                                           Name: Arthur W. Huge
                                           Title: Vice President and Controller


                                        By: Erie B Corporation


                                        By: /s/ Arthur W. Huge
                                           -------------------------------------
                                           Name: Arthur W. Huge
                                           Title: Vice President and Controller

<PAGE>   12


                                        By: Erie I Corporation


                                        By: /s/ Arthur W. Huge
                                           -------------------------------------
                                           Name: Arthur W. Huge
                                           Title: Vice President and Controller



                                        LTV STEEL TUBULAR PRODUCTS
                                           COMPANY


                                        By: /s/ Arthur W. Huge
                                           -------------------------------------
                                           Name: Arthur W. Huge
                                           Title: Vice President and Controller



                                        BT COMMERCIAL CORPORATION,
                                           individually and as Agent
                                           and Collateral Agent

                                        By: /s/ Bruce W. Addison
                                           -------------------------------------
                                           Name: Bruce W. Addison
                                           Title:  Vice President


                                        CAISSE NATIONALE DE CREDIT
                                           AGRICOLE, as a Lender


                                        By: /s/ David Bouhl
                                           -------------------------------------
                                           Name: DAVID BOUHL, F.V.P.
                                           Title: HEAD OF CORPORATE BANKING
                                                         CHICAGO
<PAGE>   13

                                        THE CHASE MANHATTAN BANK,
                                           as a Lender

                                        By: /s/ Peter M. Ling
                                           -------------------------------------
                                           Name: Peter M. Ling
                                           Title: Vice President



                                        CREDIT LYONNAIS CHICAGO
                                           BRANCH, as a Lender



                                        By: /s/ Julie T. Kanak 
                                           -------------------------------------
                                           Name: Julie T. Kanak
                                           Title: Vice President 



                                        KEYBANK NATIONAL ASSOCIATION, as a 
                                           Lender



                                        By: /s/ Richard A. Pohle
                                           -------------------------------------
                                           Name:  Richard A. Pohle
                                           Title: Vice President



                                        THE LONG-TERM CREDIT BANK OF
                                           JAPAN, LTD., CHICAGO BRANCH,
                                           as a Lender

                                        By: /s/ Brady S. Sadek
                                           -------------------------------------
                                           Name:  Brady S. Sadek
                                           Title: Senior Vice President


<PAGE>   14

                                        MELLON BANK N.A., as a Lender



                                        By: /s/ Richard K. James 
                                           -------------------------------------
                                           Name:  Richard K. James
                                           Title: Vice President 


                                        NATIONAL CITY BANK, as a Lender



                                        By: /s/ Renold D. Thompson, Jr.
                                           -------------------------------------
                                           Name: Renold D. Thompson, Jr.
                                           Title: Senior Vice President

                                        PNC BANK, NATIONAL ASSOCIATION,
                                           as a Lender



                                        By: /s/ MARK W. RUTHERFORD
                                           -------------------------------------
                                           Name: MARK W. RUTHERFORD
                                           Title: Vice-President



                                        THE SUMITOMO BANK, LTD.,
                                           CHICAGO BRANCH, as a Lender


                                        By: 
                                           -------------------------------------
                                           Name: 
                                           Title:



<PAGE>   15


                 TENTH AMENDMENT TO LETTER OF CREDIT AGREEMENT
                 ---------------------------------------------


            TENTH AMENDMENT (the "Amendment"), dated as of September 4, 1997,
among The LTV Corporation, a Delaware corporation ("LTV"), LTV Steel Company,
Inc., a New Jersey corporation ("LTVSC"), LTV Steel Mining Company, a Minnesota
limited partnership ("LTVSM"), LTV Steel Tubular Products Company, a Delaware
corporation ("LTVSTP", and together with LTVSC and LTVSM, the "Borrowers"), the
financial institutions party to the Credit Agreement referred to below (the
"Lenders") and BT Commercial Corporation, acting as Agent (the "Agent") in the
manner and to the extent described in Article 9 of the Credit Agreement referred
to below. All capitalized terms used herein and not otherwise defined shall have
the respective meanings provided such terms in the Credit Agreement.


                              W I T N E S S E T H:
                              - - - - - - - - - -


            WHEREAS, LTV, the Borrowers, the Lenders and the Agent are parties
to a Credit Agreement, dated as of October 12, 1994 (as amended, modified or
supplemented to the date hereof, the "Credit Agreement"); and

            WHEREAS, the parties hereto wish to amend the Credit Agreement as
herein provided;


            1. Section 1.1 of the Credit Agreement is hereby amended by
inserting the following new definition in alphabetical order:

            "INDENTURE shall mean the indenture containing provisions
      substantially in the form of the provisions in the preliminary Offering
      Memorandum of LTV, dated August 29, 1997.".

            2. Section 7,3 of the Credit Agreement is hereby amended by
inserting the following text at the end of clause (xi) thereof: 


      "; PROVIDED FURTHER that the Indebtedness permitted under clause (vii) of
      this Section, including any redemption premium payable with respect
      thereto, may be refinanced with the proceeds of the offering of notes
      contemplated by the preliminary Offering Memorandum of LTV dated August
      29, 1997.".

            3. Section 7.16 of the Credit Agreement is hereby amended by
deleting the period at the end thereof and inserting the following text in lieu
thereof:

      "; PROVIDED FURTHER that this Section 7.16 shall not prohibit the creation
      of restrictions affecting Subsidiaries as are set out in the Indenture.".






<PAGE>   16

            4. In order to induce the undersigned Lenders to enter into this
Amendment, LTV and the Borrowers hereby represent and warrant that:

            (a) No Default or Event of Default exists as of the Tenth Amendment
      Effective Date (as defined below in Section 8), and after giving effect to
      this Amendment;

            (b) On the Tenth Amendment Effective Date after giving effect to
      this Amendment, all representations and warranties contained in the Credit
      Agreement and the other Credit Documents are true and correct in all
      material respects;

            (c) On and after the Tenth Amendment Effective Date, this Amendment
      shall be permitted by, and shall not violate any material term of or cause
      a breach of, any of the Related Agreements; and

            (d) As of the Tenth Amendment Effective Date, all Guarantors (except
      LTV) are direct or indirect, wholly-owned Subsidiaries of LTV which would
      be considered to be Restricted Subsidiaries (as defined in the Indenture)
      for purposes of the Indenture.

            5. This Amendment is limited as specified and shall not constitute a
modification, acceptance or waiver of any other provision of the Credit
Agreement or any other Credit Document.

            6. This Amendment may be executed in any number of counterparts and
by the different parties hereto on separate counterparts, each of which
counterparts when executed and delivered shall be an original, but all of which
shall together constitute one and the same instrument. A complete set of
counterparts shall be lodged with LTV, the Borrowers and the Agent.

            7. THIS AMENDMENT AND THE RIGHTS AND OBLIGATIONS OF THE PARTIES
HEREUNDER SHALL BE CONSTRUED IN ACCORDANCE WITH AND GOVERNED BY THE LAW OF THE
STATE OF NEW YORK.

            8. This Amendment shall become effective on the date (the "Tenth
Amendment Effective Date") on which LTV, the Borrowers and the Required Lenders
shall have signed a copy hereof (whether the same or different copies) and shall
have delivered (including by way of facsimile device) the same to the Agent.

            9. From and after the Tenth Amendment Effective Date, all references
in the Credit Agreement and each of the Credit Documents to the Credit Agreement
shall be deemed to be references to such Credit Agreement as amended hereby.


                               *       *       *







                                      -2-


<PAGE>   17

            IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be executed and delivered by their proper and duly authorized officers as of the
date set forth above.


                                        THE LTV CORPORATION


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: John C. Skurek
                                           Title: Vice President and Treasurer



                                        LTV STEEL COMPANY, INC.


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: John C. Skurek
                                           Title: Vice President and Treasurer



                                        LTV STEEL MINING CO.

                                        By: Youngstown Erie Corporation


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: John C. Skurek
                                           Title: Vice President and Treasurer


                                        By: Erie B Corporation


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: John C. Skurek
                                           Title: Vice President and Treasurer

<PAGE>   18


                                        By: Erie I Corporation


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: John C. Skurek
                                           Title: Vice President and Treasurer



                                        LTV STEEL TUBULAR PRODUCTS
                                           COMPANY


                                        By: /s/ J.C. Skurek
                                           -------------------------------------
                                           Name: John C. Skurek
                                           Title: Vice President and Treasurer



                                        BT COMMERCIAL CORPORATION,
                                           individually and as Agent
                                           and Collateral Agent

                                        By: /s/ Bruce W. Addison
                                           -------------------------------------
                                           Name: Bruce W. Addison
                                           Title:  Vice President


                                        CAISSE NATIONALE DE CREDIT
                                           AGRICOLE, as a Lender


                                        By: /s/ David Bouhl
                                           -------------------------------------
                                           Name: David Bouhl, F.V.P.
                                           Title: Head of Corporate Banking
                                                         Chicago
<PAGE>   19

                                        THE CHASE MANHATTAN BANK,
                                           as a Lender

                                        By: /s/ James H. Ramage
                                           -------------------------------------
                                           Name: James H. Ramage
                                           Title: Vice President



                                        CREDIT LYONNAIS CHICAGO
                                           BRANCH, as a Lender



                                        By: /s/ Julie T. Kanak 
                                           -------------------------------------
                                           Name: Julie T. Kanak
                                           Title: Vice President 



                                        KEYBANK NATIONAL ASSOCIATION, as a 
                                           Lender



                                        By: /s/ Richard A. Pohle
                                           -------------------------------------
                                           Name:  Richard A. Pohle
                                           Title: Vice President



                                        THE LONG-TERM CREDIT BANK OF
                                           JAPAN, LTD., CHICAGO BRANCH,
                                           as a Lender

                                        By: /s/ Brady S. Sadek
                                           -------------------------------------
                                           Name:  Brady S. Sadek
                                           Title: Senior Vice President  


<PAGE>   20
                                        MELLON BANK N.A., as a Lender



                                        By: /s/ Richard K. James 
                                           -------------------------------------
                                           Name:  Richard K. James
                                           Title: Vice President 


                                        NATIONAL CITY BANK, as a Lender



                                        By: /s/ Davis R. Bonner
                                           -------------------------------------
                                           Name: Davis R. Bonner
                                           Title: Vice President

                                        PNC BANK, NATIONAL ASSOCIATION,
                                           as a Lender



                                        By: /s/ Mark W. Rutherford
                                           -------------------------------------
                                           Name: Mark W. Rutherford
                                           Title: Vice President



                                        THE SUMITOMO BANK, LTD.,
                                           CHICAGO BRANCH, as a Lender


                                        By: /s/ John H. Kemper
                                           -------------------------------------
                                           Name: John H. Kemper
                                           Title: Senior Vice President