================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549


                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

Date of report (Date of earliest event reported)  February 13, 1998

                     Structured Asset Securities Corporation
--------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Its Charter)


 Delaware                           33-96378                74-2440858
--------------------------------------------------------------------------------
(State or Other Jurisdiction        (Commission             (IRS Employer
of Incorporation)                   File Number)            Identification No.)


200 Vesey Street, New York, New York                        10285
--------------------------------------------------------------------------------
(Address of Principal Executive Offices)                    (Zip Code)

Registrant's telephone number, including area code  (212) 526-7000


-------------------------------------------------------------------------------
          (Former Name or Former Address, if Changed Since Last Report)


------------------------------------------------------------------------------

================================================================================
<PAGE>

Item 5. Other Events.

      It is expected that during late February or early March of 1998, a single
series of certificates, entitled Lehman Brothers Commercial Mortgage Trust,
Commercial Mortgage Pass-Through Certificates, Series 1998-C1 (the
"Certificates"), will be issued pursuant to a pooling and servicing agreement,
to be entered into by and among Structured Asset Securities Corporation (the
"Registrant"), GMAC Commercial Mortgage Corporation, as master servicer and as
special servicer, LaSalle National Bank, as trustee, and ABN AMRO Bank N.V., as
fiscal agent. Certain classes of the Certificates (the "Underwritten
Certificates") will be registered under the Registrant's registration statement
on Form S-3 (no. 33-96378) and sold to Lehman Brothers Inc. (the "Underwriter")
pursuant to an underwriting agreement to be entered into by and between the
Registrant and the Underwriter.

      In connection with the expected sale of the Underwritten Certificates, the
Underwriter has advised the Registrant that it has furnished to prospective
investors certain information attached hereto as Exhibit 99.1 that may be
considered "Computational Materials" (as defined in the no-action letter dated
May 20, 1994 issued by the Division of Corporation Finance of the Securities and
Exchange Commission (the "Commission") to Kidder, Peabody Acceptance Corporation
I, Kidder, Peabody & Co. Incorporated, and Kidder Structured Asset Corporation
and the no-action letter dated May 27, 1994 issued by the Division of
Corporation Finance of the Commission to the Public Securities Association) and
"ABS Term Sheets" (as defined in the no-action letter dated February 17, 1995
issued by the Division of Corporation Finance of the Commission to the Public
Securities Association).

      The Computational Materials and ABS Term Sheets attached hereto have been
prepared and provided to the Registrant by the Underwriter. The information in
such Computational Materials and ABS Term Sheets is preliminary and will be
superseded by the final Prospectus Supplement relating to the Underwritten
Certificates and by any other information subsequently filed with the
Commission. To the extent any Computational Materials and ABS Term Sheets
previously filed by the Registrant with respect to the Underwritten Certificates
are inconsistent with the Computational Materials and ABS Term Sheets attached
hereto, such previously filed Computational Materials and ABS Term Sheets are
superseded by the Computational Materials and ABS Term Sheets attached hereto.

Item 7. Financial Statements and Exhibits.

(a)   Financial statements of businesses acquired:

      Not applicable.

(b)   Pro forma financial information:

      Not applicable.


                                       -2-
<PAGE>

(c)   Exhibits:

Exhibit No.      Description

99.1             Computational Materials and ABS Term Sheets prepared by 
                 Lehman Brothers Inc.


                                       -3-
<PAGE>

                                  SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

Date: February 18, 1998


                                     STRUCTURED ASSET SECURITIES
                                      CORPORATION


                                    By: /s/ Paul A. Hughson
                                        -----------------------
                                        Name: Paul A. Hughson
                                        Title:   Vice President


                                       -4-
<PAGE>

                                 EXHIBIT INDEX

            The following exhibits are filed herewith:

Exhibit No.                                                           Page No.
-----------                                                           --------

99.1        Computational Materials and ABS Term Sheets prepared by
            Lehman Brothers Inc.


                                     -5-
[{"type": "8-K", "sequence": "1", "description": "FORM 8-K", "secsgml_size_bytes": 5698}]
{"company-data": {"conformed-name": "STRUCTURED ASSET SEC CORP SERIES 1998-3", "cik": "0000808851", "assigned-sic": "6189", "irs-number": "742440850", "state-of-incorporation": "DE", "fiscal-year-end": "1231"}, "filing-values": {"form-type": "8-K", "act": "34", "file-number": "033-96378", "film-number": "98585084"}, "business-address": {"street1": "200 VESEY ST 20TH FLR", "city": "NEW YORK", "state": "NY", "zip": "10285", "phone": "2115265594"}, "mail-address": {"street1": "200 VESEY STREET", "street2": "24TH FLOOR", "city": "NEW YORK", "state": "NY", "zip": "10285"}, "former-company": [{"former-conformed-name": "STRUCTURED ASSET SECURITIES CORP", "date-changed": "19980205"}, {"former-conformed-name": "STRUCTURED ASSET SEC CORP SERIES 1998-2", "date-changed": "19980203"}, {"former-conformed-name": "STRUCTURED ASSET SEC CORP MORT PASS THR CERT SERIES 1997-4", "date-changed": "19980106"}]}
================================================================================

                       SECURITIES AND EXCHANGE COMMISSION
                             Washington, D.C. 20549

                                    FORM 8-K

                                 CURRENT REPORT

                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

Date of report (Date of earliest event reported)  February 13, 1998

                     Structured Asset Securities Corporation
--------------------------------------------------------------------------------
             (Exact Name of Registrant as Specified in Its Charter)

 Delaware                           33-96378                74-2440858
--------------------------------------------------------------------------------
(State or Other Jurisdiction        (Commission             (IRS Employer
of Incorporation)                   File Number)            Identification No.)

200 Vesey Street, New York, New York                        10285
--------------------------------------------------------------------------------
(Address of Principal Executive Offices)                    (Zip Code)

Registrant's telephone number, including area code  (212) 526-7000

-------------------------------------------------------------------------------
          (Former Name or Former Address, if Changed Since Last Report)

------------------------------------------------------------------------------

================================================================================
Item 5. Other Events.

      It is expected that during late February or early March of 1998, a single
series of certificates, entitled Lehman Brothers Commercial Mortgage Trust,
Commercial Mortgage Pass-Through Certificates, Series 1998-C1 (the
"Certificates"), will be issued pursuant to a pooling and servicing agreement,
to be entered into by and among Structured Asset Securities Corporation (the
"Registrant"), GMAC Commercial Mortgage Corporation, as master servicer and as
special servicer, LaSalle National Bank, as trustee, and ABN AMRO Bank N.V., as
fiscal agent. Certain classes of the Certificates (the "Underwritten
Certificates") will be registered under the Registrant's registration statement
on Form S-3 (no. 33-96378) and sold to Lehman Brothers Inc. (the "Underwriter")
pursuant to an underwriting agreement to be entered into by and between the
Registrant and the Underwriter.

      In connection with the expected sale of the Underwritten Certificates, the
Underwriter has advised the Registrant that it has furnished to prospective
investors certain information attached hereto as Exhibit 99.1 that may be
considered "Computational Materials" (as defined in the no-action letter dated
May 20, 1994 issued by the Division of Corporation Finance of the Securities and
Exchange Commission (the "Commission") to Kidder, Peabody Acceptance Corporation
I, Kidder, Peabody & Co. Incorporated, and Kidder Structured Asset Corporation
and the no-action letter dated May 27, 1994 issued by the Division of
Corporation Finance of the Commission to the Public Securities Association) and
"ABS Term Sheets" (as defined in the no-action letter dated February 17, 1995
issued by the Division of Corporation Finance of the Commission to the Public
Securities Association).

      The Computational Materials and ABS Term Sheets attached hereto have been
prepared and provided to the Registrant by the Underwriter. The information in
such Computational Materials and ABS Term Sheets is preliminary and will be
superseded by the final Prospectus Supplement relating to the Underwritten
Certificates and by any other information subsequently filed with the
Commission. To the extent any Computational Materials and ABS Term Sheets
previously filed by the Registrant with respect to the Underwritten Certificates
are inconsistent with the Computational Materials and ABS Term Sheets attached
hereto, such previously filed Computational Materials and ABS Term Sheets are
superseded by the Computational Materials and ABS Term Sheets attached hereto.

Item 7. Financial Statements and Exhibits.

(a)   Financial statements of businesses acquired:

      Not applicable.

(b)   Pro forma financial information:

      Not applicable.

                                       -2-
(c)   Exhibits:

Exhibit No.      Description

99.1             Computational Materials and ABS Term Sheets prepared by 
                 Lehman Brothers Inc.

                                       -3-
SIGNATURES

      Pursuant to the requirements of the Securities Exchange Act of 1934, the
Registrant has duly caused this report to be signed on its behalf by the
undersigned, thereunto duly authorized.

Date: February 18, 1998

                                     STRUCTURED ASSET SECURITIES
                                      CORPORATION

                                    By: /s/ Paul A. Hughson
                                        -----------------------
                                        Name: Paul A. Hughson
                                        Title:   Vice President

                                       -4-
EXHIBIT INDEX

            The following exhibits are filed herewith:

Exhibit No.                                                           Page No.
-----------                                                           --------

99.1        Computational Materials and ABS Term Sheets prepared by
            Lehman Brothers Inc.

                                     -5-