<?xml version="1.0" encoding="US-ASCII"?>
<!-- Generated by CompSci Transform (tm) - http://www.compsciresources.com -->
<!-- Created: Thu Mar 14 14:10:02 UTC 2024 -->
<linkbase xmlns="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" xmlns:xbrldt="http://xbrl.org/2005/xbrldt">
  <roleRef xlink:type="simple" xlink:href="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd#PvpAdjustmentsOnly" roleURI="http://xbrl.sec.gov/ecd/role/PvpAdjustmentsOnly"/>
  <roleRef xlink:type="simple" xlink:href="ufpi-20240424.xsd#ufpi_r_AdditionalDimensions" roleURI="http://ufpi.com/role/AdditionalDimensions"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member"/>
  <arcroleRef xlink:type="simple" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" arcroleURI="http://xbrl.org/int/dim/arcrole/all"/>
  <definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/ecd/role/PvpAdjustmentsOnly">
    <loc xlink:type="locator" xlink:label="ecd_AllAdjToCompMember" xlink:href="https://xbrl.sec.gov/ecd/2023/ecd-2023.xsd#ecd_AllAdjToCompMember"/>
    <loc xlink:type="locator" xlink:label="ufpi_GrantDateFairValueGDFVOfEquityAwardsReportedInSCTMember" xlink:href="ufpi-20240424.xsd#ufpi_GrantDateFairValueGDFVOfEquityAwardsReportedInSCTMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_GrantDateFairValueGDFVOfEquityAwardsReportedInSCTMember" order="1" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ufpi_FVAsOfFYEndOfEquityAwardsGrantedDuringTheYearThatAreOutstandingAndUnvestedAsOfFYEndMember" xlink:href="ufpi-20240424.xsd#ufpi_FVAsOfFYEndOfEquityAwardsGrantedDuringTheYearThatAreOutstandingAndUnvestedAsOfFYEndMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_FVAsOfFYEndOfEquityAwardsGrantedDuringTheYearThatAreOutstandingAndUnvestedAsOfFYEndMember" order="3" xbrldt:closed="true"/>
<!-- [WMV5][XcpuxYn59dz7vgYynUDuwG7r97K2jUTysl7vcz0lJt9uqgO9qQHmt9BQ98lPQIywLyErl6i3VNQvfxipqnp8S3snfJwveXP1/M/2zlJr+bwAZkKHLim39Imz6jPteAxNppvjrnzxUcTJyUy6gu+crf/WXTuJCCbXLk+VcuiD5E2KaYzxQJ3zQvXBTudI3D+rm45SinF2Ub/xEohvE63f8Xd9tOUmbAK9DZCUptQTwDpUzlZ86r5k1bsqlIoYxuxuzOOv44SCu2RS67Mwm1j+BC814S0xqRLGEjwlhJXeshI18T5Mrw2a5ycb+L7Of/pS] CSR-->
    <loc xlink:type="locator" xlink:label="ufpi_ChangeAsOfEndOfFYInFVOfAwardsGrantedInAnyPriorYearThatAreOutstandingAndUnvestedAsOfFYEndMember" xlink:href="ufpi-20240424.xsd#ufpi_ChangeAsOfEndOfFYInFVOfAwardsGrantedInAnyPriorYearThatAreOutstandingAndUnvestedAsOfFYEndMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_ChangeAsOfEndOfFYInFVOfAwardsGrantedInAnyPriorYearThatAreOutstandingAndUnvestedAsOfFYEndMember" order="5" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ufpi_ChangeAsOfTheVestingDateFromEndOfPriorFYInFVForAnyEquityAwardsGrantedInAnyPriorYearThatVestedAtTheEndOfOrDuringFYMember" xlink:href="ufpi-20240424.xsd#ufpi_ChangeAsOfTheVestingDateFromEndOfPriorFYInFVForAnyEquityAwardsGrantedInAnyPriorYearThatVestedAtTheEndOfOrDuringFYMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_ChangeAsOfTheVestingDateFromEndOfPriorFYInFVForAnyEquityAwardsGrantedInAnyPriorYearThatVestedAtTheEndOfOrDuringFYMember" order="7" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ufpi_FVAsOfTheVestingDateForAwardsThatAreGrantedAndVestInTheSameFYMember" xlink:href="ufpi-20240424.xsd#ufpi_FVAsOfTheVestingDateForAwardsThatAreGrantedAndVestInTheSameFYMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_FVAsOfTheVestingDateForAwardsThatAreGrantedAndVestInTheSameFYMember" order="9" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ufpi_DividendsOrOtherEarningsPaidOnStockOrOptionAwardsInTheCoveredFYPriorToTheVestingDateThatAreNotOtherwiseIncludedInTheTotalCompensationForTheCoveredFYMember" xlink:href="ufpi-20240424.xsd#ufpi_DividendsOrOtherEarningsPaidOnStockOrOptionAwardsInTheCoveredFYPriorToTheVestingDateThatAreNotOtherwiseIncludedInTheTotalCompensationForTheCoveredFYMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_DividendsOrOtherEarningsPaidOnStockOrOptionAwardsInTheCoveredFYPriorToTheVestingDateThatAreNotOtherwiseIncludedInTheTotalCompensationForTheCoveredFYMember" order="11" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ufpi_FVAtTheEndOfThePriorFYForAwardsGrantedInAnyPriorYearThatFailedToMeetApplicableVestingConditionsDuringFYMember" xlink:href="ufpi-20240424.xsd#ufpi_FVAtTheEndOfThePriorFYForAwardsGrantedInAnyPriorYearThatFailedToMeetApplicableVestingConditionsDuringFYMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_FVAtTheEndOfThePriorFYForAwardsGrantedInAnyPriorYearThatFailedToMeetApplicableVestingConditionsDuringFYMember" order="13" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ufpi_ChangeInActuarialPresentValueOfTheAccumulatedBenefitUnderAllDefinedBenefitAndActuarialPensionPlansReportedInSCTMember" xlink:href="ufpi-20240424.xsd#ufpi_ChangeInActuarialPresentValueOfTheAccumulatedBenefitUnderAllDefinedBenefitAndActuarialPensionPlansReportedInSCTMember"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_ChangeInActuarialPresentValueOfTheAccumulatedBenefitUnderAllDefinedBenefitAndActuarialPensionPlansReportedInSCTMember" order="15" xbrldt:closed="true"/>
    <loc xlink:type="locator" xlink:label="ufpi_AggregateOfPensionServiceCostAttributableToServicesRenderedDuringTheFYAndAnyPriorServiceCostAttributableToServicesRenderedInPriorPeriodsAsDeterminedUnderAccountingStandardsCodificationASC715Member" xlink:href="ufpi-20240424.xsd#ufpi_AggregateOfPensionServiceCostAttributableToServicesRenderedDuringTheFYAndAnyPriorServiceCostAttributableToServicesRenderedInPriorPeriodsAsDeterminedUnderAccountingStandardsCodificationASC715Member"/>
    <definitionArc xlink:type="arc" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="ecd_AllAdjToCompMember" xlink:to="ufpi_AggregateOfPensionServiceCostAttributableToServicesRenderedDuringTheFYAndAnyPriorServiceCostAttributableToServicesRenderedInPriorPeriodsAsDeterminedUnderAccountingStandardsCodificationASC715Member" order="17" xbrldt:closed="true"/>
  </definitionLink>
  <definitionLink xlink:type="extended" xlink:role="http://ufpi.com/role/AdditionalDimensions"/>
</linkbase>
