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  <xsd:import namespace="http://fasb.org/us-types/2011-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2011/elts/us-types-2011-01-31.xsd"/>
  <xsd:import namespace="http://xbrl.sec.gov/dei/2011-01-31" schemaLocation="http://xbrl.sec.gov/dei/2011/dei-2011-01-31.xsd"/>
  <xsd:element name="ResearchAndDevelopmentAndOtherEngineering" id="ssd_ResearchAndDevelopmentAndOtherEngineering" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element name="StockIssuedDuringPeriodSharesStockOptionsExercise" id="ssd_StockIssuedDuringPeriodSharesStockOptionsExercise" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="DebtIssuanceCostsForCreditFacility" id="ssd_DebtIssuanceCostsForCreditFacility" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element name="SupplementalCashFlowCashPaidAbstract" id="ssd_SupplementalCashFlowCashPaidAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ConsolidationOfVariableInterestEntity" id="ssd_ConsolidationOfVariableInterestEntity" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element name="ReportingSegmentsNumberPriorToSaleOfDiscontinuedOperations" id="ssd_ReportingSegmentsNumberPriorToSaleOfDiscontinuedOperations" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ReportingSegmentsNumber" id="ssd_ReportingSegmentsNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="DocumentAndEntityInformationAbstract" id="ssd_DocumentAndEntityInformationAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationPerShare" id="ssd_ShareBasedCompensationPerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="InterestIncomeNet" id="ssd_InterestIncomeNet" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element name="AccruedInterestEarnedFromRelatedParties" id="ssd_AccruedInterestEarnedFromRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration"/>
  <xsd:element name="AllowanceForSalesDiscountAndReturnsCurrent" id="ssd_AllowanceForSalesDiscountAndReturnsCurrent" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant"/>
  <xsd:element name="PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress" id="ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element name="ScheduleOfIntangibleAssetsBySegmentTableTextBlock" id="ssd_ScheduleOfIntangibleAssetsBySegmentTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ScheduleOfGoodwillAndIntangibleAssetsTable" id="ssd_ScheduleOfGoodwillAndIntangibleAssetsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="NorthAmericaMember" id="ssd_NorthAmericaMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="EuropeMember" id="ssd_EuropeMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="AsiaPacificMember" id="ssd_AsiaPacificMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="GoodwillAbstract" id="ssd_GoodwillAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="IntangibleAssetsAbstract" id="ssd_IntangibleAssetsAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="GoodwillAndIntangibleAssetsLineItems" id="ssd_GoodwillAndIntangibleAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="IntangibleAssetsRollForward" id="ssd_IntangibleAssetsRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="IntangibleAssetsTranslationAdjustments" id="ssd_IntangibleAssetsTranslationAdjustments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="duration"/>
  <xsd:element name="KeymarkEnterprisesLLCMember" id="ssd_KeymarkEnterprisesLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsBalanceSheetTableTextBlock" id="ssd_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsBalanceSheetTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementTableTextBlock" id="ssd_ScheduleOfDisposalGroupsIncludingDiscontinuedOperationsIncomeStatementTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="SimpsonDuraVentCompanyIncMember" id="ssd_SimpsonDuraVentCompanyIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="SegmentAndDiscontinuedOperationsPolicyTextBlock" id="ssd_SegmentAndDiscontinuedOperationsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="StockOptionPlan1994Member" id="ssd_StockOptionPlan1994Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="StockOptionPlan2011Member" id="ssd_StockOptionPlan2011Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="StockOptionPlan1995Member" id="ssd_StockOptionPlan1995Member" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfTimesOptionsGrantedUnderPlansEachYear" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfTimesOptionsGrantedUnderPlansEachYear" type="xbrli:stringItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardAgeAfterWhichVestingOfOptionsGrantedAccelerates" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardAgeAfterWhichVestingOfOptionsGrantedAccelerates" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="PercentageOfInterestHeldForEquityMethodInvestmentsHighEndOfRange" id="ssd_PercentageOfInterestHeldForEquityMethodInvestmentsHighEndOfRange" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ServiceSalesPercentageOfNetSales" id="ssd_ServiceSalesPercentageOfNetSales" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ScheduleOfShareBasedCompensationUnvestedStockOptionsActivityTableTextBlock" id="ssd_ScheduleOfShareBasedCompensationUnvestedStockOptionsActivityTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceDateOfGrantLowEndOfRange" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceDateOfGrantLowEndOfRange" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceDateOfGrantHighEndOfRange" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceDateOfGrantHighEndOfRange" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsContractualTermAbstract" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsContractualTermAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnrecognizedCompensationCostAbstract" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsUnrecognizedCompensationCostAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsAggregateIntrinsicValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedRollForward" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedRollForward" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumber" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedNumber" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValueAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedForfeitedInPeriod" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedForfeitedInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedGrantsInPeriod" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedGrantsInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriod" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedWeightedAverageGrantDateFairValue" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsVestedInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <xsd:element name="OtherLinesOfCreditMember" id="ssd_OtherLinesOfCreditMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="USTreasurySecuritiesAndMoneyMarketFundsFairValueDisclosure" id="ssd_USTreasurySecuritiesAndMoneyMarketFundsFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="debit" xbrli:periodType="instant"/>
  <xsd:element name="CommonStockClosingPricePerShare" id="ssd_CommonStockClosingPricePerShare" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedGrantsInPeriodWeightedAverageGrantDateFairValue" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedGrantsInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedForfeitedInPeriodWeightedAverageGrantDateFairValue" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsNonvestedForfeitedInPeriodWeightedAverageGrantDateFairValue" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="OperationsAndSummaryOfSignificantAccountingPoliciesDisclosureAbstract" id="ssd_OperationsAndSummaryOfSignificantAccountingPoliciesDisclosureAbstract" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="NumberOfStockIncentivePlans" id="ssd_NumberOfStockIncentivePlans" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="NumberOfStockOptionPlansSuperseded" id="ssd_NumberOfStockOptionPlansSuperseded" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceDateOfGrant" id="ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsExercisePriceDateOfGrant" type="num:perShareItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant"/>
  <xsd:element name="EquityMethodInvestmentOwnershipPercentageIncreaseDecrease" id="ssd_EquityMethodInvestmentOwnershipPercentageIncreaseDecrease" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration"/>
  <xsd:element name="SanLeandroFacilityMember" id="ssd_SanLeandroFacilityMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration"/>
</xsd:schema>
