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  <xs:element id="fss_DismissedMember" abstract="true" name="DismissedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LineofCreditFacilityCovenantsHolidayPermittedAcquisitionConsideration" abstract="false" name="LineofCreditFacilityCovenantsHolidayPermittedAcquisitionConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_SettlementCandidatesDomain" abstract="true" name="SettlementCandidatesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LatvianCommercialDisputeMember" abstract="true" name="LatvianCommercialDisputeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_TaxBenefitFromWorthlessStockDeductionInterest" abstract="false" name="TaxBenefitFromWorthlessStockDeductionInterest" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_DeferredTaxPaymentsUnderCARESAct" abstract="false" name="DeferredTaxPaymentsUnderCARESAct" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_BuffaloFirefighterPlaintiffsMember" abstract="true" name="BuffaloFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LackawannaFirefighterPlaintiffsMember" abstract="true" name="LackawannaFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LineofCreditFacilityCovenantsPermittedOtherIncrementalCashPayments" abstract="false" name="LineofCreditFacilityCovenantsPermittedOtherIncrementalCashPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_StockIssuedDuringPeriodValueStockOptionExercisesAndOther" abstract="false" name="StockIssuedDuringPeriodValueStockOptionExercisesAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_LackawannaCountyPennsylvaniaMember" abstract="true" name="LackawannaCountyPennsylvaniaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SafetyAndSecuritySystemsMember" abstract="true" name="SafetyAndSecuritySystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_DepreciableRentalEquipmentAvailableforOperatingLeasesAccumulatedDepreciation" abstract="false" name="DepreciableRentalEquipmentAvailableforOperatingLeasesAccumulatedDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOperatingLeaseRightOfUseAsset" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredandLiabilitiesAssumedOperatingLeaseRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_ErieCountyFirefighterPlaintiffsMember" abstract="true" name="ErieCountyFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_NewYorkCityFirefighterPlaintiffsMember" abstract="true" name="NewYorkCityFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_CommitmentsDisclosureLineItems" abstract="true" name="CommitmentsDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="fss_AcquisitionsNarrativeAbstract" abstract="true" name="AcquisitionsNarrativeAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="fss_LossContingencyNumberOfPlaintiffsDismissed" abstract="false" name="LossContingencyNumberOfPlaintiffsDismissed" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="fss_NewYorkKingsCountyFirefighterPlaintiffsMember" abstract="true" name="NewYorkKingsCountyFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_InterestRateSwap2022Member" abstract="true" name="InterestRateSwap2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="fss_NorthAmericanRefuseTruckBodyBusinessMember" abstract="true" name="NorthAmericanRefuseTruckBodyBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_UnrecognizedTaxBenefitDecreaseResultingFromDiscontinuedOperationsandDisposal" abstract="false" name="UnrecognizedTaxBenefitDecreaseResultingFromDiscontinuedOperationsandDisposal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_PittsburghFirefighterPlaintiffsMember" abstract="true" name="PittsburghFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_OutsideChicagoFirefighterPlaintiffsMember" abstract="true" name="OutsideChicagoFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_TaxBenefitFromInterestOfStockDeduction" abstract="false" name="TaxBenefitFromInterestOfStockDeduction" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_EuropeOtherMember" abstract="true" name="EuropeOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_PennsylvaniaFirefighterPlaintiffsMember" abstract="true" name="PennsylvaniaFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LesseeOperatingLeaseInitialLeaseTerm" abstract="false" name="LesseeOperatingLeaseInitialLeaseTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="fss_ResponsiveSettlementCandidatesDomain" abstract="true" name="ResponsiveSettlementCandidatesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_Amended2016CreditAgreementMember" abstract="true" name="Amended2016CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_TaxBenefitFromRemeasurementOfDeferredTaxesForChangesinStateTaxApportionment" abstract="false" name="TaxBenefitFromRemeasurementOfDeferredTaxesForChangesinStateTaxApportionment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_IndustrialsignalingequipmentMember" abstract="true" name="IndustrialsignalingequipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_EnvironmentalSolutionsMember" abstract="true" name="EnvironmentalSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_RentalincomeMember" abstract="true" name="RentalincomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_A2022CreditAgreementMember" abstract="true" name="A2022CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SupremeCourtofStateofNewYorkErieCountyMember" abstract="true" name="SupremeCourtofStateofNewYorkErieCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_PercentageOfClaimantsAgreedForSettlementAsPerSettlementAgreement" abstract="false" name="PercentageOfClaimantsAgreedForSettlementAsPerSettlementAgreement" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="fss_RecognizedTaxBenefitFromWorhtlessStockDeductionNet" abstract="false" name="RecognizedTaxBenefitFromWorhtlessStockDeductionNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_Warrantyperiod" abstract="false" name="Warrantyperiod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="fss_BusinessAcquisitionPurchasePriceAdjustment" abstract="false" name="BusinessAcquisitionPurchasePriceAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherIntangibleAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_InterestRateSwapFairValueDisclosure" abstract="false" name="InterestRateSwapFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_FairValueMeasurementwithUnobservableInputsReconciliationsRecurringBasisForeignCurrencyAdjustment" abstract="false" name="FairValueMeasurementwithUnobservableInputsReconciliationsRecurringBasisForeignCurrencyAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
