    <SEC-DOCUMENT>0000099780-21-000115-index.html : 20210729
    <SEC-HEADER>0000099780-21-000115.hdr.sgml : 20210729
    <ACCEPTANCE-DATETIME>20210729161453
    ACCESSION NUMBER:		0000099780-21-000115
    CONFORMED SUBMISSION TYPE:	8-K
    PUBLIC DOCUMENT COUNT:		70
    CONFORMED PERIOD OF REPORT:	20210729
    ITEM INFORMATION:		Regulation FD Disclosure
    ITEM INFORMATION:		Financial Statements and Exhibits
    FILED AS OF DATE:		20210729
    DATE AS OF CHANGE:		20210729

    FILER:

    	COMPANY DATA:
    		COMPANY CONFORMED NAME:			TRINITY INDUSTRIES INC
    		CENTRAL INDEX KEY:			0000099780
    		STANDARD INDUSTRIAL CLASSIFICATION:	RAILROAD EQUIPMENT [3743]
    		IRS NUMBER:				750225040
    		STATE OF INCORPORATION:			DE
    		FISCAL YEAR END:			1231

    	FILING VALUES:
    		FORM TYPE:		8-K
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-06903
    		FILM NUMBER:		211127591

    	BUSINESS ADDRESS:
    		STREET 1:		14221 N DALLAS PARKWAY
    		STREET 2:		SUITE 1100
    		CITY:			DALLAS
    		STATE:			TX
    		ZIP:			75254
    		BUSINESS PHONE:		214-631-4420

    	MAIL ADDRESS:
    		STREET 1:		14221 N DALLAS PARKWAY
    		STREET 2:		SUITE 1100
    		CITY:			DALLAS
    		STATE:			TX
    		ZIP:			75254

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	TRINITY STEEL CO INC
    		DATE OF NAME CHANGE:	19720407
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>8-K
    <SEQUENCE>1
    <FILENAME>trn-20210729.htm
    <DESCRIPTION>8-K
    <TEXT>
    Document 1 - file: trn-20210729.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-99.1
    <SEQUENCE>2
    <FILENAME>q22021investorpresentati.htm
    <DESCRIPTION>EX-99.1
    <TEXT>
    Document 2 - file: q22021investorpresentati.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.SCH
    <SEQUENCE>3
    <FILENAME>trn-20210729.xsd
    <DESCRIPTION>XBRL TAXONOMY EXTENSION SCHEMA DOCUMENT
    <TEXT>
    Document 3 - file: trn-20210729.xsd

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.LAB
    <SEQUENCE>4
    <FILENAME>trn-20210729_lab.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION LABEL LINKBASE DOCUMENT
    <TEXT>
    Document 4 - file: trn-20210729_lab.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EX-101.PRE
    <SEQUENCE>5
    <FILENAME>trn-20210729_pre.xml
    <DESCRIPTION>XBRL TAXONOMY EXTENSION PRESENTATION LINKBASE DOCUMENT
    <TEXT>
    Document 5 - file: trn-20210729_pre.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>6
    <FILENAME>q22021investorpresentati001.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 6 - file: q22021investorpresentati001.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>7
    <FILENAME>q22021investorpresentati002.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 7 - file: q22021investorpresentati002.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>8
    <FILENAME>q22021investorpresentati003.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 8 - file: q22021investorpresentati003.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>9
    <FILENAME>q22021investorpresentati004.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 9 - file: q22021investorpresentati004.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>10
    <FILENAME>q22021investorpresentati005.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 10 - file: q22021investorpresentati005.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>11
    <FILENAME>q22021investorpresentati006.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 11 - file: q22021investorpresentati006.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>12
    <FILENAME>q22021investorpresentati007.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 12 - file: q22021investorpresentati007.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>13
    <FILENAME>q22021investorpresentati008.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 13 - file: q22021investorpresentati008.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>14
    <FILENAME>q22021investorpresentati009.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 14 - file: q22021investorpresentati009.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>15
    <FILENAME>q22021investorpresentati010.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 15 - file: q22021investorpresentati010.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>16
    <FILENAME>q22021investorpresentati011.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 16 - file: q22021investorpresentati011.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>17
    <FILENAME>q22021investorpresentati012.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 17 - file: q22021investorpresentati012.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>18
    <FILENAME>q22021investorpresentati013.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 18 - file: q22021investorpresentati013.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>19
    <FILENAME>q22021investorpresentati014.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 19 - file: q22021investorpresentati014.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>20
    <FILENAME>q22021investorpresentati015.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 20 - file: q22021investorpresentati015.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>21
    <FILENAME>q22021investorpresentati016.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 21 - file: q22021investorpresentati016.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>22
    <FILENAME>q22021investorpresentati017.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 22 - file: q22021investorpresentati017.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>23
    <FILENAME>q22021investorpresentati018.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 23 - file: q22021investorpresentati018.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>24
    <FILENAME>q22021investorpresentati019.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 24 - file: q22021investorpresentati019.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>25
    <FILENAME>q22021investorpresentati020.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 25 - file: q22021investorpresentati020.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>26
    <FILENAME>q22021investorpresentati021.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 26 - file: q22021investorpresentati021.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>27
    <FILENAME>q22021investorpresentati022.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 27 - file: q22021investorpresentati022.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>28
    <FILENAME>q22021investorpresentati023.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 28 - file: q22021investorpresentati023.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>29
    <FILENAME>q22021investorpresentati024.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 29 - file: q22021investorpresentati024.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>30
    <FILENAME>q22021investorpresentati025.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 30 - file: q22021investorpresentati025.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>31
    <FILENAME>q22021investorpresentati026.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 31 - file: q22021investorpresentati026.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>32
    <FILENAME>q22021investorpresentati027.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 32 - file: q22021investorpresentati027.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>33
    <FILENAME>q22021investorpresentati028.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 33 - file: q22021investorpresentati028.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>34
    <FILENAME>q22021investorpresentati029.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 34 - file: q22021investorpresentati029.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>35
    <FILENAME>q22021investorpresentati030.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 35 - file: q22021investorpresentati030.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>36
    <FILENAME>q22021investorpresentati031.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 36 - file: q22021investorpresentati031.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>37
    <FILENAME>q22021investorpresentati032.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 37 - file: q22021investorpresentati032.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>38
    <FILENAME>q22021investorpresentati033.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 38 - file: q22021investorpresentati033.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>39
    <FILENAME>q22021investorpresentati034.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 39 - file: q22021investorpresentati034.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>40
    <FILENAME>q22021investorpresentati035.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 40 - file: q22021investorpresentati035.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>41
    <FILENAME>q22021investorpresentati036.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 41 - file: q22021investorpresentati036.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>42
    <FILENAME>q22021investorpresentati037.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 42 - file: q22021investorpresentati037.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>43
    <FILENAME>q22021investorpresentati038.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 43 - file: q22021investorpresentati038.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>44
    <FILENAME>q22021investorpresentati039.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 44 - file: q22021investorpresentati039.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>45
    <FILENAME>q22021investorpresentati040.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 45 - file: q22021investorpresentati040.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>46
    <FILENAME>q22021investorpresentati041.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 46 - file: q22021investorpresentati041.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>47
    <FILENAME>q22021investorpresentati042.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 47 - file: q22021investorpresentati042.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>48
    <FILENAME>q22021investorpresentati043.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 48 - file: q22021investorpresentati043.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>49
    <FILENAME>q22021investorpresentati044.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 49 - file: q22021investorpresentati044.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>50
    <FILENAME>q22021investorpresentati045.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 50 - file: q22021investorpresentati045.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>51
    <FILENAME>q22021investorpresentati046.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 51 - file: q22021investorpresentati046.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>52
    <FILENAME>q22021investorpresentati047.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 52 - file: q22021investorpresentati047.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>53
    <FILENAME>q22021investorpresentati048.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 53 - file: q22021investorpresentati048.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>54
    <FILENAME>q22021investorpresentati049.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 54 - file: q22021investorpresentati049.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>55
    <FILENAME>q22021investorpresentati050.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 55 - file: q22021investorpresentati050.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>56
    <FILENAME>q22021investorpresentati051.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 56 - file: q22021investorpresentati051.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>57
    <FILENAME>q22021investorpresentati052.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 57 - file: q22021investorpresentati052.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>58
    <FILENAME>q22021investorpresentati053.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 58 - file: q22021investorpresentati053.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>59
    <FILENAME>q22021investorpresentati054.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 59 - file: q22021investorpresentati054.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>60
    <FILENAME>q22021investorpresentati055.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 60 - file: q22021investorpresentati055.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>61
    <FILENAME>q22021investorpresentati056.jpg
    <DESCRIPTION>GRAPHIC
    <TEXT>
    Document 61 - file: q22021investorpresentati056.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>GRAPHIC
    <SEQUENCE>62
    <FILENAME>trn-20210729_g1.jpg
    <TEXT>
    Document 62 - file: trn-20210729_g1.jpg

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>63
    <FILENAME>trn-20210729_htm.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 63 - file: trn-20210729_htm.html

    Document 63 - RAW XML: trn-20210729_htm.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>64
    <FILENAME>R1.htm
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 64 - file: R1.htm

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>EXCEL
    <SEQUENCE>65
    <FILENAME>Financial_Report.xlsx
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 65 - file: Financial_Report.xlsx

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>66
    <FILENAME>Show.js
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 66 - file: Show.js

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>67
    <FILENAME>report.css
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 67 - file: report.css

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>XML
    <SEQUENCE>68
    <FILENAME>FilingSummary.xml
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 68 - file: FilingSummary.html

    Document 68 - RAW XML: FilingSummary.xml

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>JSON
    <SEQUENCE>71
    <FILENAME>MetaLinks.json
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 71 - file: MetaLinks.json

    </DOCUMENT>
    <DOCUMENT>
    <TYPE>ZIP
    <SEQUENCE>72
    <FILENAME>0000099780-21-000115-xbrl.zip
    <DESCRIPTION>IDEA: XBRL DOCUMENT
    <TEXT>
    Document 72 - file: 0000099780-21-000115-xbrl.zip

    </DOCUMENT>
    </SEC-DOCUMENT>