Simpson Manufacturing Co., Inc. and Subsidiaries

Computation of Earnings Per Common Share

(Unaudited)

Exhibit 11

Basic Earnings per Share

		Three Months Ended
		March 31,
		2002			2001
Weighted average number of common
shares outstanding		12,184,713			12,037,073
Net income		$	9,729,940		$	8,980,154
Basic net income per share		$	0.80		$	0.75

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Diluted Earnings per Share

		Three Months Ended
		March 31,
		2002			2001
Weighted average number of common
shares outstanding		12,184,713			12,037,073
Shares issuable pursuant to employee stock
option plans, less shares assumed
repurchased at the average fair value
during the period		173,293			236,359
Shares issuable pursuant to the independent
director stock option plan, less shares
assumed repurchased at the average fair
value during the period		2,168			4,053
Number of shares for computation of diluted
net income per share		12,360,174			12,277,485
Net income		$	9,729,940		$	8,980,154
Diluted net income per share		$	0.79		$	0.73

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