    <SEC-DOCUMENT>0000920371-19-000005-index.html : 20190110
    <SEC-HEADER>0000920371-19-000005.hdr.sgml : 20190110
    <ACCEPTANCE-DATETIME>20190110143004
    ACCESSION NUMBER:		0000920371-19-000005
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		15
    CONFORMED PERIOD OF REPORT:	20190110
    ITEM INFORMATION:		Regulation FD Disclosure
    FILED AS OF DATE:		20190110
    DATE AS OF CHANGE:		20190110

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			SIMPSON MANUFACTURING CO INC /CA/
    		CENTRAL INDEX KEY:			0000920371
    		STANDARD INDUSTRIAL CLASSIFICATION:	CUTLERY, HANDTOOLS & GENERAL HARDWARE [3420]
    		IRS NUMBER:				943196943
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-13429
    		FILM NUMBER:		19520051

    	BUSINESS ADDRESS:
    		STREET 1:		5956 W LAS POSITAS BLVD
    		CITY:			PLEASANTON
    		STATE:			CA
    		ZIP:			94588
    		BUSINESS PHONE:		9255609000

    	MAIL ADDRESS:
    		STREET 1:		5956 W LAS POSITAS BLVD
    		CITY:			PLEASANTON
    		STATE:			CA
    		ZIP:			94588
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>form8-kitem701fddisclosure.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: form8-kitem701fddisclosure.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>a190110ssdoffseasonin2f9.htm
    <DESCRIPTION>EXHIBIT 99.1
    <TEXT>
    Document 2 - file: a190110ssdoffseasonin2f9.htm

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>3
    <FILENAME>a190110ssdoffseasonin2f9001.jpg
    <TEXT>
    Document 3 - file: a190110ssdoffseasonin2f9001.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>4
    <FILENAME>a190110ssdoffseasonin2f9002.jpg
    <TEXT>
    Document 4 - file: a190110ssdoffseasonin2f9002.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>5
    <FILENAME>a190110ssdoffseasonin2f9003.jpg
    <TEXT>
    Document 5 - file: a190110ssdoffseasonin2f9003.jpg

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    <SEQUENCE>6
    <FILENAME>a190110ssdoffseasonin2f9004.jpg
    <TEXT>
    Document 6 - file: a190110ssdoffseasonin2f9004.jpg

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    <DOCUMENT>
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    <SEQUENCE>7
    <FILENAME>a190110ssdoffseasonin2f9005.jpg
    <TEXT>
    Document 7 - file: a190110ssdoffseasonin2f9005.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>a190110ssdoffseasonin2f9006.jpg
    <TEXT>
    Document 8 - file: a190110ssdoffseasonin2f9006.jpg

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    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>a190110ssdoffseasonin2f9007.jpg
    <TEXT>
    Document 9 - file: a190110ssdoffseasonin2f9007.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>a190110ssdoffseasonin2f9008.jpg
    <TEXT>
    Document 10 - file: a190110ssdoffseasonin2f9008.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>a190110ssdoffseasonin2f9009.jpg
    <TEXT>
    Document 11 - file: a190110ssdoffseasonin2f9009.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>a190110ssdoffseasonin2f9010.jpg
    <TEXT>
    Document 12 - file: a190110ssdoffseasonin2f9010.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>a190110ssdoffseasonin2f9011.jpg
    <TEXT>
    Document 13 - file: a190110ssdoffseasonin2f9011.jpg

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    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>a190110ssdoffseasonin2f9012.jpg
    <TEXT>
    Document 14 - file: a190110ssdoffseasonin2f9012.jpg

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    <DOCUMENT>
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    <SEQUENCE>15
    <FILENAME>a190110ssdoffseasonin2f9013.jpg
    <TEXT>
    Document 15 - file: a190110ssdoffseasonin2f9013.jpg

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