EXHIBIT 4(K) CERTIFICATE OF TRUST The undersigned, the trustees of Alcoa Trust I, desiring to form a business trust pursuant to Delaware Business Trust Act, 12 Del. C. (S) 3810 et ---- -- -- seq., hereby certify as follows: - ---- (a) The name of the business trust being formed hereby (the "Trust") is "Alcoa Trust I." (b) The name and business address of the trustee of the Trust which has its principal place of business in the State of Delaware is as follows: Chase Manhattan Bank Delaware 1201 Market St. Wilmington, DE 19801 Attention: Trust Department (c) This Certificate of Trust shall be effective as of the date of filing. Dated: July 10, 1998 /S/ Cynthia E. Holloway ----------------------------------- CYNTHIA E. HOLLOWAY Regular Trustee /S/ Robert G. Wennemer ---------------------------------- ROBERT G. WENNEMER Regular Trustee /S/ Richard B. Kelson ---------------------------------- RICHARD B. KELSON Regular Trustee CHASE MANHATTAN BANK DELAWARE, as Delaware Trustee By: /S/ Denis Kelly ------------------------------- Denis Kelly Trust Officer THE CHASE MANHATTAN BANK, as Institutional Trustee By: /S/ Joanne Adamis ------------------------------- Joanne Adamis Assistant Vice President