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  <element id="rs_BusinessAcquisitionPurchasePriceAllocationOtherDisclosureAbstract" name="BusinessAcquisitionPurchasePriceAllocationOtherDisclosureAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable" id="rs_ScheduleOfFiniteLivedAndIndefiniteLivedIntangibleAssetsByMajorClassTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems" id="rs_FiniteLivedAndIndefiniteLivedIntangibleAssetsLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IntangibleAssetsNetAbstract" id="rs_IntangibleAssetsNetAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="rs_IntangibleAssetsExcludingGoodwillForeignCurrencyTranslationAdjustment" name="IntangibleAssetsExcludingGoodwillForeignCurrencyTranslationAdjustment" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_DeferredTaxLiabilitiesLIFOInventoryCosts" name="DeferredTaxLiabilitiesLIFOInventoryCosts" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="ScheduleOfDebtInstrumentsTable" id="rs_ScheduleOfDebtInstrumentsTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtInstrumentIssuedTranchesNumber" id="rs_DebtInstrumentIssuedTranchesNumber" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="DebtRedemptionPriceDueToChangeOfControlAndDowngradeOfCreditRatingAsPercentageOfPrincipalAmount" id="rs_DebtRedemptionPriceDueToChangeOfControlAndDowngradeOfCreditRatingAsPercentageOfPrincipalAmount" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PreferredStockSharesIssuanceNumberOfSeriesMinimum" id="rs_PreferredStockSharesIssuanceNumberOfSeriesMinimum" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityMethodInvestmentsAndMinorityInterestAbstract" id="rs_EquityMethodInvestmentsAndMinorityInterestAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityMethodInvestmentsAndMinorityInterestDisclosureTextBlock" id="rs_EquityMethodInvestmentsAndMinorityInterestDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PensionAndOtherPostretirementBenefitsDisclosureAndPostemploymentBenefitsDisclosureAbstract" id="rs_PensionAndOtherPostretirementBenefitsDisclosureAndPostemploymentBenefitsDisclosureAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="PensionAndOtherPostretirementBenefitsDisclosureAndPostemploymentBenefitsDisclosureTextBlock" id="rs_PensionAndOtherPostretirementBenefitsDisclosureAndPostemploymentBenefitsDisclosureTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EMJMember" id="rs_EMJMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CashSurrenderValuePoliciesOwnedByWhollyOwnedSubsidiaryTable" id="rs_CashSurrenderValuePoliciesOwnedByWhollyOwnedSubsidiaryTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CashSurrenderValuePoliciesByBorrowingStatusAxis" id="rs_CashSurrenderValuePoliciesByBorrowingStatusAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CashSurrenderValuePoliciesByBorrowingStatusDomain" id="rs_CashSurrenderValuePoliciesByBorrowingStatusDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CashSurrenderValuePoliciesBorrowedMember" id="rs_CashSurrenderValuePoliciesBorrowedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CashSurrenderValuePoliciesUnborrowedMember" id="rs_CashSurrenderValuePoliciesUnborrowedMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="CashSurrenderValuePoliciesOwnedByWhollyOwnedSubsidiaryLineItems" id="rs_CashSurrenderValuePoliciesOwnedByWhollyOwnedSubsidiaryLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="rs_LoansBorrowedAgainstLifeInsurancePolicies" name="LoansBorrowedAgainstLifeInsurancePolicies" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="LoansBorrowedAgainstLifeInsurancePolicyFixedInterestRateUnderCertainLifeInsurancePolicies" id="rs_LoansBorrowedAgainstLifeInsurancePolicyFixedInterestRateUnderCertainLifeInsurancePolicies" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="LoansOutstandingAgainstLifeInsurancePoliciesIncludingAccruedInterest" id="rs_LoansOutstandingAgainstLifeInsurancePoliciesIncludingAccruedInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="AccountsReceivableAndConcentrationsOfCreditRiskPolicyTextBlock" id="rs_AccountsReceivableAndConcentrationsOfCreditRiskPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LongLivedAssetsPolicyTextBlock" id="rs_LongLivedAssetsPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <element id="rs_NumberOfLocationsInWhichEntityOperatesMinimum" name="NumberOfLocationsInWhichEntityOperatesMinimum" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_MinimumNumberOfMetalProductsDistributedByEntity" name="MinimumNumberOfMetalProductsDistributedByEntity" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="CarbonSteelMember" id="rs_CarbonSteelMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AluminumMember" id="rs_AluminumMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="StainlessSteelMember" id="rs_StainlessSteelMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AlloySteelMember" id="rs_AlloySteelMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="TollProcessingMember" id="rs_TollProcessingMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="rs_OtherProductsOrServicesMember" name="OtherProductsOrServicesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="SalesRevenueGoodsAndServicesNetPercentage" id="rs_SalesRevenueGoodsAndServicesNetPercentage" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="AceroPrimeSDeRLDeCVMember" id="rs_AceroPrimeSDeRLDeCVMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OregonFeralloyPartnersLLCMember" id="rs_OregonFeralloyPartnersLLCMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IndianaPicklingAndProcessingCompanyMember" id="rs_IndianaPicklingAndProcessingCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="FeralloyProcessingCompanyMember" id="rs_FeralloyProcessingCompanyMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ValexCorpMember" id="rs_ValexCorpMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityMethodInvestmentAndMinorityInterestTable" id="rs_EquityMethodInvestmentAndMinorityInterestTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EquityMethodInvestmentAndMinorityInterestLineItems" id="rs_EquityMethodInvestmentAndMinorityInterestLineItems" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="NumberOfJointVentureInterestsInWhichEntityHasNoncontrollingInterest" id="rs_NumberOfJointVentureInterestsInWhichEntityHasNoncontrollingInterest" type="xbrli:integerItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OwnershipPercentageByParentForConsolidation" id="rs_OwnershipPercentageByParentForConsolidation" type="num:percentItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="instant" />
  <xsd:element name="ScheduleOfFutureMinimumLeasePaymentsForLeasesTableTextBlock" id="rs_ScheduleOfFutureMinimumLeasePaymentsForLeasesTableTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LeaseCommitmentMinimumTermForFurtherDisclosure" id="rs_LeaseCommitmentMinimumTermForFurtherDisclosure" type="xbrli:durationItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="OperatingLeasePaymentsDueToRelatedParties" id="rs_OperatingLeasePaymentsDueToRelatedParties" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" nillable="true" xbrli:balance="credit" xbrli:periodType="duration" />
  <element id="rs_ScheduleOfNonvestedRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" name="ScheduleOfNonvestedRestrictedStockAndRestrictedStockUnitsActivityTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="RestrictedStockAndRestrictedStockUnitsMember" id="rs_RestrictedStockAndRestrictedStockUnitsMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="GoodwillPolicyAbstract" id="rs_GoodwillPolicyAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="rs_ShareOfCommonStock" name="ShareOfCommonStock" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAndLongTermDebt" id="rs_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCurrentAndLongTermDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:balance="credit" xbrli:periodType="instant" />
  <xsd:element name="ImpactOfNewAccountingPronouncementsNotYetAdoptedPolicyTextBlock" id="rs_ImpactOfNewAccountingPronouncementsNotYetAdoptedPolicyTextBlock" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" abstract="false" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ComponentOfOtherNonoperatingIncomeExpenseTable" id="rs_ComponentOfOtherNonoperatingIncomeExpenseTable" type="xbrli:stringItemType" substitutionGroup="xbrldt:hypercubeItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ComponentOfOtherNonoperatingIncomeExpenseAxis" id="rs_ComponentOfOtherNonoperatingIncomeExpenseAxis" type="xbrli:stringItemType" substitutionGroup="xbrldt:dimensionItem" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="ComponentOfOtherNonoperatingIncomeExpenseNameDomain" id="rs_ComponentOfOtherNonoperatingIncomeExpenseNameDomain" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="InvestmentIncomeFromLifeInsurancePoliciesMember" id="rs_InvestmentIncomeFromLifeInsurancePoliciesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="LifeInsurancePolicyCostOfInsuranceMember" id="rs_LifeInsurancePolicyCostOfInsuranceMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="IncomeFromLifeInsurancePolicyRedemptionMember" id="rs_IncomeFromLifeInsurancePolicyRedemptionMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="MiscellaneousOtherNonoperatingIncomeExpenseMember" id="rs_MiscellaneousOtherNonoperatingIncomeExpenseMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="rs_ComponentOfOtherNonoperatingIncomeExpenseLineItems" name="ComponentOfOtherNonoperatingIncomeExpenseLineItems" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <xsd:element name="OtherSecuritiesMember" id="rs_OtherSecuritiesMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <xsd:element name="EagleSteelProductsIncMember" id="rs_EagleSteelProductsIncMember" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" nillable="true" xbrli:periodType="duration" />
  <element id="rs_PremiumsAndAccruedInterestOnLoansBorrowedAgainstLifeInsurancePolicies" name="PremiumsAndAccruedInterestOnLoansBorrowedAgainstLifeInsurancePolicies" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_RestrictedStockWithPerformanceConditionsMember" name="RestrictedStockWithPerformanceConditionsMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_PaymentsOfOrdinaryDividendsCommonStockAndDividendEquivalents" name="PaymentsOfOrdinaryDividendsCommonStockAndDividendEquivalents" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_StockRepurchaseProgramIncreaseInNumberOfSharesAuthorizedToBeRepurchased" name="StockRepurchaseProgramIncreaseInNumberOfSharesAuthorizedToBeRepurchased" nillable="true" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_StockRepurchaseAcquiredAverageCostPerShare" name="StockRepurchaseAcquiredAverageCostPerShare" nillable="true" type="num:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_NumberOfIntangibleAssetsSubjectToImpairment" name="NumberOfIntangibleAssetsSubjectToImpairment" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_PerformanceTargetPeriod" name="PerformanceTargetPeriod" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_TubularSteelInc.Member" name="TubularSteelInc.Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_NumberOfLocationEntityOperates" name="NumberOfLocationEntityOperates" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_ConcentrationRiskValue" name="ConcentrationRiskValue" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_DividendsAndDividendEquivalentsCommonStockCash" name="DividendsAndDividendEquivalentsCommonStockCash" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_BestManufacturingInc.Member" name="BestManufacturingInc.Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_FiniteLivedIntangibleAssetsAmortizationExpenseYearSix" name="FiniteLivedIntangibleAssetsAmortizationExpenseYearSix" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_Acquisitions2016Member" name="Acquisitions2016Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_CumulativeEffectOfNewAccountingPrincipleDuringPeriodOfAdoption" name="CumulativeEffectOfNewAccountingPrincipleDuringPeriodOfAdoption" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_AlaskaSteelCompanyMember" name="AlaskaSteelCompanyMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_OtherNotesAndRevolvingCreditFacilitiesMember" name="OtherNotesAndRevolvingCreditFacilitiesMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_CreditAgreementMember" name="CreditAgreementMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_ImpairmentAndRestructuringChargesDisclosureAbstract" name="ImpairmentAndRestructuringChargesDisclosureAbstract" nillable="true" type="xbrli:stringItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_UnsecuredRevolvingCreditFacilityDueSeptember2021Member" name="UnsecuredRevolvingCreditFacilityDueSeptember2021Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_UnsecuredTermLoanDueSeptember2021Member" name="UnsecuredTermLoanDueSeptember2021Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity" name="LineOfCreditFacilityContingentIncreaseAdditionalBorrowingCapacity" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_ExercisePriceDollar38Member" name="ExercisePriceDollar38Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_ScheduleOfInventoryValuationReserveAndInventoryLiquidationsTableTextBlock" name="ScheduleOfInventoryValuationReserveAndInventoryLiquidationsTableTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_LIFOInventoryCostOnFIFOAmount" name="LIFOInventoryCostOnFIFOAmount" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_PostemploymentBenefitsPeriodExpenseIncome" name="PostemploymentBenefitsPeriodExpenseIncome" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="debit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_NumberOfConsecutiveYearsOfRegularCommonStockQuarterlyDividends" name="NumberOfConsecutiveYearsOfRegularCommonStockQuarterlyDividends" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_GoodwillWrittenOffRelatedToDisposalOfBusinessUnit" name="GoodwillWrittenOffRelatedToDisposalOfBusinessUnit" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_RestrictedStockUnitsRSU2016Member" name="RestrictedStockUnitsRSU2016Member" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_UnrecordedUnconditionalPurchaseObligationThirdAnniversaryAndThereafter" name="UnrecordedUnconditionalPurchaseObligationThirdAnniversaryAndThereafter" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_CumulativeEffectOfProspectiveApplicationOfNewAccountingPrincipleNetOfTax1" name="CumulativeEffectOfProspectiveApplicationOfNewAccountingPrincipleNetOfTax1" nillable="true" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xbrli:balance="credit" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_BusinessPolicyTextBlock" name="BusinessPolicyTextBlock" nillable="true" type="nonnum:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_FergusonPerforatingCompanyMember" name="FergusonPerforatingCompanyMember" nillable="true" type="nonnum:domainItemType" substitutionGroup="xbrli:item" abstract="true" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
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  <element id="rs_NumberOfPerformanceObligationFromSaleOfMetalProducts" name="NumberOfPerformanceObligationFromSaleOfMetalProducts" nillable="true" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
  <element id="rs_NumberOfDaysToPerformServices" name="NumberOfDaysToPerformServices" nillable="true" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" xmlns="http://www.w3.org/2001/XMLSchema" />
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</xsd:schema>
