Exhibit 31.1

                     Certification under Section 302 of the
                           Sarbanes-Oxley Act of 2002

I, Stan L.  Hasselbusch,  President and Chief Executive  Officer of L. B. Foster
Company, certify that:

        1.        I have reviewed this Quarterly Report on Form 10-Q of L. B.
                  Foster Company;

        2.        Based on my knowledge, this quarterly report does not contain
                  any untrue statement of a material fact or omit to state a
                  material fact necessary to make the statements made, in light
                  of the circumstances under which statements were made, not
                  misleading with respect to the period covered by this
                  quarterly report;

        3.        Based on my knowledge, the financial statements, and other
                  financial information included in this quarterly report,
                  fairly present in all material respects the financial
                  condition, results of operations and cash flows of the
                  registrant as of, and for, the periods presented in this
                  quarterly report;

        4.        The registrant's other certifying officer and I are
                  responsible for establishing and maintaining disclosure
                  controls and procedures (as defined in Exchange Act Rules
                  13a-15(e) and 15d - 15(e)) for the registrant and we have:

                  (a) Designed such disclosure controls and procedures, or
                  caused such disclosure controls and procedures to be designed
                  under our supervision, to ensure that material information
                  relating to the registrant, including its consolidated
                  subsidiaries, is made known to us by others within those
                  entities, particularly during the period in which this
                  quarterly report is being prepared;

                  (b) Evaluated the effectiveness of the registrant's disclosure
                  controls and procedures and presented in this quarterly report
                  our conclusions about the effectiveness of the disclosure
                  controls and procedures, as of the end of the period covered
                  by this report based upon such evaluation; and

                  (c) Disclosed in this quarterly report any change in the
                  registrant's internal control over financial reporting that
                  occurred during the registrant's most recent fiscal quarter
                  (the registrant's fourth fiscal quarter in the case of an
                  annual report) that has materially affected, or is reasonably
                  likely to materially affect, the registrant's internal control
                  over financial reporting; and

        5.        The registrant's other certifying officer and I have
                  disclosed, based on our most recent evaluation of internal
                  control over financial reporting, to the registrant's auditors
                  and the audit committee of the registrant's board of directors
                  (or persons performing the equivalent function):

                  (a) All significant deficiencies and material weaknesses in
                  the design or operation of internal control over financial
                  reporting which are reasonably likely to adversely affect the
                  registrant's ability to record, process, summarize and report
                  financial information; and

                  (b) Any fraud, whether or not material, that involves
                  management or other employees who have a significant role in
                  the registrant's internal control over financial reporting.

August 12, 2004                     /s/ Stan L. Hasselbusch
                                   -----------------------------------
                                   Name: Stan L. Hasselbusch
                                   Title: President and Chief Executive Officer