BankAmerica Corp. filed for a proposed shelf offering of up to $1 billion of debt and up to $50 million of currency warrants.

UAL, which is planning a $1 billion shelf offering of notes, fell 3 7/8, to 153 3/8.

If the seasoned equity offering is made by an issuer that meets certain regulatory criteria, it may be a shelf offering.

It assigned ratings to $256 billion of corporate debt, including shelf offerings but excluding structured financings.

Debt * American General Corp. filed a shelf offering of up to $400 million of debt securities.

Debt * Crown Cork and Seal Co., Philadelphia, filed for a shelf offering of up to $600 million in debt securities.

Rights issues are sometimes carried out as a shelf offering.

Separately, the corporation filed for a shelf offering of $3 billion in medium-term Euronotes.

Columbus Southern Power Co. filed a shelf offering of up to $200 million of first mortgage bonds.

The Rohm & Haas Holdings Ltd. subsidiary also filed for a shelf offering of $150 million in debt securities guaranteed by the company.