SEC Form 4

FORM 4		UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934 or Section 30(h) of the Investment Company Act of 1940	OMB APPROVAL OMB Number: 3235-0287 Estimated average burden hours per response: 0.5
	Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

1. Name and Address of Reporting Person* HASSELBUSCH STAN L (Last) (First) (Middle) L.B. FOSTER COMPANY 415 HOLIDAY DRIVE (Street) PITTSBURGH PA 15220 (City) (State) (Zip)	2. Issuer Name and Ticker or Trading Symbol FOSTER L B CO [ FSTR ]	5. Relationship of Reporting Person(s) to Issuer (Check all applicable) X Director 10% Owner X Officer (give title below) Other (specify below) President and Chief Executive
	3. Date of Earliest Transaction (Month/Day/Year) 05/05/2006
	4. If Amendment, Date of Original Filed (Month/Day/Year)	6. Individual or Joint/Group Filing (Check Applicable Line) X Form filed by One Reporting Person Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock	05/05/2006		M		15,000	A	$4.44	52,816	D
Common Stock	05/05/2006		S		10,000	D	$24.95	42,816	D
Common Stock	05/05/2006		S		5,000	D	$25	37,817	D
Common Stock	05/08/2006		M		8,000	A	$4.44	45,817	D
Common Stock	05/08/2006		S		8,000	D	$24.95	37,817	D
Common Stock	05/09/2006		M		27,000	A	$4.44	60,817	D
Common Stock	05/09/2006		S		27,000	D	$24.95	37,817	D
Common Stock								25,053	I	Approximate share equivalent of units in 401(k) trust

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares
Option to Buy	$5.25							08/13/1998	08/12/2008	Common	25,000		25,000	D
Option to Buy	$4.38							10/23/1998	10/22/2008	Common	25,000		25,000	D
Option to Buy	$4.44	05/05/2006		M			15,000	03/01/2001(1)	02/28/2010	Common	15,000	$0(6)	35,000	D
Option to Buy	$4.44	05/08/2006		M			8,000	03/01/2001(1)	02/28/2010	Common	8,000	$0(6)	27,000	D
Option to Buy	$4.44	05/09/2006		M			27,000	03/01/2001(1)	02/28/2010	Common	27,000	(6)	0	D
Option to Buy	$2.75							02/02/2002(2)	02/01/2011	Common	20,000		20,000	D
Option to Buy	$3.65							05/09/2002(3)	05/08/2011	Common	30,000		30,000	D
Option to Buy	$4.75							12/12/2002(4)	12/11/2011	Common	50,000		50,000	D
Option to Buy	$5.5							05/15/2002(5)	05/14/2012	Common	20,000		20,000	D

Explanation of Responses:

1. 25% becomes exercisable on 3/1/01 and an additional 25% becomes vested on each of the next three anniversaries

2. 25% becomes exercisable on 2/2/02 and an additional 25% becomes vested on each of the next three anniversaries

3. 25% becomes exercisable on 5/9/02 and an additional 25% becomes vested on each of the next three anniversaries

4. 25% becomes exercisable on 12/12/02 and an additional 25% becomes vested on each of the next three anniversaries

5. 25% becomes exercisable on 5/15/03 and an additional 25% becomes vested on each of the next three anniversaries

6. Not applicable

Remarks:

	Stan L. Hasselbusch	05/09/2006
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
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