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    <link:label id="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue_EB67AF64D05BB25C4C93E33635178B8B_terseLabel_en-US" xlink:label="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue_EB67AF64D05BB25C4C93E33635178B8B" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding and expected to vest at the end of the period (in dollars per share)</link:label>
    <link:label id="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue_EB67AF64D05BB25C4C93E33635178B8B_label_en-US" xlink:label="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue_EB67AF64D05BB25C4C93E33635178B8B" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share Based Compensation Arrangement by Share Based Payment Award, Equity Instruments Other than Options, Vested and Expected to Vest Weighted Average Grant Date Fair Value</link:label>
    <link:label id="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue_EB67AF64D05BB25C4C93E33635178B8B_documentation_en-US" xlink:label="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue_EB67AF64D05BB25C4C93E33635178B8B" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">The weighted average fair value for nonvested restricted stock units issued during the period on other than stock (or unit) option plans.</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue_EB67AF64D05BB25C4C93E33635178B8B" xlink:to="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestWeightedAverageGrantDateFairValue_EB67AF64D05BB25C4C93E33635178B8B" xlink:type="arc" />
    <link:label id="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestIntrinsicValue_32133AAB161996FC42BEE3363517C962_terseLabel_en-US" xlink:label="lab_ssd_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsVestedAndExpectedToVestIntrinsicValue_32133AAB161996FC42BEE3363517C962" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Outstanding and expected to vest at end of the period (in dollars)</link:label>
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    <link:label id="lab_us-gaap_DepreciationDepletionAndAmortization_C981DA586DA3D66811D993171E39F9A3_label_en-US" xlink:label="lab_us-gaap_DepreciationDepletionAndAmortization_C981DA586DA3D66811D993171E39F9A3" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Depreciation, Depletion and Amortization</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DepreciationDepletionAndAmortization" xlink:label="loc_us-gaap_DepreciationDepletionAndAmortization_C981DA586DA3D66811D993171E39F9A3" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_NoncashProjectAbandonmentCosts" xlink:label="loc_us-gaap_NoncashProjectAbandonmentCosts_B902EC0A3082D41891D093171E39DC2B" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_NoncashProjectAbandonmentCosts_B902EC0A3082D41891D093171E39DC2B" xlink:to="lab_us-gaap_NoncashProjectAbandonmentCosts_B902EC0A3082D41891D093171E39DC2B" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_3BE27605ACA09AE1A9F393171E398A6A_terseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_3BE27605ACA09AE1A9F393171E398A6A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Loss in equity method investment, before tax</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1" xlink:label="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_3BE27605ACA09AE1A9F393171E398A6A" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_3BE27605ACA09AE1A9F393171E398A6A" xlink:to="lab_us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInAmountOfContingentConsiderationLiability1_3BE27605ACA09AE1A9F393171E398A6A" xlink:type="arc" />
    <link:label id="lab_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_ACBA7BD3E2F113A7113A93171E3977CD_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_ACBA7BD3E2F113A7113A93171E3977CD" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain (adjustment) on bargain purchase of a business</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount" xlink:label="loc_us-gaap_BusinessCombinationBargainPurchaseGainRecognizedAmount_ACBA7BD3E2F113A7113A93171E3977CD" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GainLossOnSaleOfBusiness_6F7E0F0052584DBF810E93171E396445_negatedTerseLabel_en-US" xlink:label="lab_us-gaap_GainLossOnSaleOfBusiness_6F7E0F0052584DBF810E93171E396445" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:type="resource" xml:lang="en-US">Gain on disposal of a business</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GainLossOnSaleOfBusiness" xlink:label="loc_us-gaap_GainLossOnSaleOfBusiness_6F7E0F0052584DBF810E93171E396445" xlink:type="locator" />
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    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_51E62B50ADECEF60857093171E398E0A_terseLabel_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_51E62B50ADECEF60857093171E398E0A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Deferred income taxes</link:label>
    <link:label id="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_51E62B50ADECEF60857093171E398E0A_label_en-US" xlink:label="lab_us-gaap_DeferredIncomeTaxExpenseBenefit_51E62B50ADECEF60857093171E398E0A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Deferred Income Tax Expense (Benefit)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DeferredIncomeTaxExpenseBenefit" xlink:label="loc_us-gaap_DeferredIncomeTaxExpenseBenefit_51E62B50ADECEF60857093171E398E0A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensation_EC0C351166C170D763BA93171E39D293_verboseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_EC0C351166C170D763BA93171E39D293" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Noncash compensation related to stock plans</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensation_EC0C351166C170D763BA93171E39D293_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensation_EC0C351166C170D763BA93171E39D293" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation</link:label>
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    <link:label id="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_C51491FDCED7C4D91AB893171E397477_negatedLabel_en-US" xlink:label="lab_us-gaap_ExcessTaxBenefitFromShareBasedCompensationOperatingActivities_C51491FDCED7C4D91AB893171E397477" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Excess tax benefit of options exercised and restricted stock units vested</link:label>
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    <link:label id="lab_us-gaap_ProvisionForDoubtfulAccounts_B4596C22222921B5B63493171E3945CB_terseLabel_en-US" xlink:label="lab_us-gaap_ProvisionForDoubtfulAccounts_B4596C22222921B5B63493171E3945CB" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Recovery (provision) of doubtful accounts</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IncreaseDecreaseInOtherNoncurrentAssets" xlink:label="loc_us-gaap_IncreaseDecreaseInOtherNoncurrentAssets_DF37B4F80CCECAEB61D593171E39405B" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LeaseholdImprovementsMember" xlink:label="loc_us-gaap_LeaseholdImprovementsMember_06B6EDBDD89239B24627E33634B3CDFF" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_LeaseholdImprovementsMember_06B6EDBDD89239B24627E33634B3CDFF" xlink:to="lab_us-gaap_LeaseholdImprovementsMember_06B6EDBDD89239B24627E33634B3CDFF" xlink:type="arc" />
    <link:label id="lab_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736_terseLabel_en-US" xlink:label="lab_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Machinery, equipment, and software</link:label>
    <link:label id="lab_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736_label_en-US" xlink:label="lab_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Machinery Equipment and Software Development [Member]</link:label>
    <link:label id="lab_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736_documentation_en-US" xlink:label="lab_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the information pertaining to tangible personal property used to produce goods and services including internally developed software for sale, licensing or long-term internal use.</link:label>
    <link:loc xlink:href="ssd-20170930.xsd#ssd_MachineryEquipmentAndSoftwareDevelopmentMember" xlink:label="loc_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736" xlink:to="lab_ssd_MachineryEquipmentAndSoftwareDevelopmentMember_CEC681C4FEC726C4A00DE33634B30736" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_54333B6488B323B738CCE33634B31E25_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_54333B6488B323B738CCE33634B31E25" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentLineItems_54333B6488B323B738CCE33634B31E25_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentLineItems_54333B6488B323B738CCE33634B31E25" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment [Line Items]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentLineItems" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentLineItems_54333B6488B323B738CCE33634B31E25" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentLineItems_54333B6488B323B738CCE33634B31E25" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentLineItems_54333B6488B323B738CCE33634B31E25" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_EACA2110FBE141504407E33634B33431_terseLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_EACA2110FBE141504407E33634B33431" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment, gross</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentGross_EACA2110FBE141504407E33634B33431_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentGross_EACA2110FBE141504407E33634B33431" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentGross" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentGross_EACA2110FBE141504407E33634B33431" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentGross_EACA2110FBE141504407E33634B33431" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentGross_EACA2110FBE141504407E33634B33431" xlink:type="arc" />
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_6DD22DCE46C772E67385E33634B3CD04_negatedLabel_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_6DD22DCE46C772E67385E33634B3CD04" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Less accumulated depreciation and amortization</link:label>
    <link:label id="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_6DD22DCE46C772E67385E33634B3CD04_label_en-US" xlink:label="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_6DD22DCE46C772E67385E33634B3CD04" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accumulated Depreciation, Depletion and Amortization, Property, Plant, and Equipment</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment" xlink:label="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_6DD22DCE46C772E67385E33634B3CD04" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_6DD22DCE46C772E67385E33634B3CD04" xlink:to="lab_us-gaap_AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment_6DD22DCE46C772E67385E33634B3CD04" xlink:type="arc" />
    <link:label id="lab_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7_totalLabel_en-US" xlink:label="lab_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment excluding capital projects in progress, net</link:label>
    <link:label id="lab_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7_label_en-US" xlink:label="lab_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property Plant and Equipment Excluding Capital Projects in Progress</link:label>
    <link:label id="lab_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7_documentation_en-US" xlink:label="lab_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the aggregate of long-lived physical assets excluding capital projects in progress used in the normal conduct of business and not intended for resale.</link:label>
    <link:loc xlink:href="ssd-20170930.xsd#ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress" xlink:label="loc_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7" xlink:to="lab_ssd_PropertyPlantAndEquipmentExcludingCapitalProjectsInProgress_F90D6B52EEB540B2444CE33634B316E7" xlink:type="arc" />
    <link:label id="lab_us-gaap_ConstructionInProgressGross_02EB87525089C66AF5C4E33634B329A2_terseLabel_en-US" xlink:label="lab_us-gaap_ConstructionInProgressGross_02EB87525089C66AF5C4E33634B329A2" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Capital projects in progress</link:label>
    <link:label id="lab_us-gaap_ConstructionInProgressGross_02EB87525089C66AF5C4E33634B329A2_label_en-US" xlink:label="lab_us-gaap_ConstructionInProgressGross_02EB87525089C66AF5C4E33634B329A2" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Construction in Progress, Gross</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ConstructionInProgressGross" xlink:label="loc_us-gaap_ConstructionInProgressGross_02EB87525089C66AF5C4E33634B329A2" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ConstructionInProgressGross_02EB87525089C66AF5C4E33634B329A2" xlink:to="lab_us-gaap_ConstructionInProgressGross_02EB87525089C66AF5C4E33634B329A2" xlink:type="arc" />
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_06B310FBB8C82EC2F6ADE33634B3DD87_totalLabel_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_06B310FBB8C82EC2F6ADE33634B3DD87" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Property, plant and equipment, net</link:label>
    <link:label id="lab_us-gaap_PropertyPlantAndEquipmentNet_06B310FBB8C82EC2F6ADE33634B3DD87_label_en-US" xlink:label="lab_us-gaap_PropertyPlantAndEquipmentNet_06B310FBB8C82EC2F6ADE33634B3DD87" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Property, Plant and Equipment, Net</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_PropertyPlantAndEquipmentNet" xlink:label="loc_us-gaap_PropertyPlantAndEquipmentNet_06B310FBB8C82EC2F6ADE33634B3DD87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_PropertyPlantAndEquipmentNet_06B310FBB8C82EC2F6ADE33634B3DD87" xlink:to="lab_us-gaap_PropertyPlantAndEquipmentNet_06B310FBB8C82EC2F6ADE33634B3DD87" xlink:type="arc" />
    <link:label id="lab_us-gaap_TitleOfIndividualAxis_1FC635E0F17710A9473A839585CC2339_terseLabel_en-US" xlink:label="lab_us-gaap_TitleOfIndividualAxis_1FC635E0F17710A9473A839585CC2339" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Title of Individual [Axis]</link:label>
    <link:label id="lab_us-gaap_TitleOfIndividualAxis_1FC635E0F17710A9473A839585CC2339_label_en-US" xlink:label="lab_us-gaap_TitleOfIndividualAxis_1FC635E0F17710A9473A839585CC2339" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Title of Individual [Axis]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TitleOfIndividualAxis" xlink:label="loc_us-gaap_TitleOfIndividualAxis_1FC635E0F17710A9473A839585CC2339" xlink:type="locator" />
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    <link:label id="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_CD94C357A95C2DE68541839585CCEF6D_terseLabel_en-US" xlink:label="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_CD94C357A95C2DE68541839585CCEF6D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Relationship to Entity [Domain]</link:label>
    <link:label id="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_CD94C357A95C2DE68541839585CCEF6D_label_en-US" xlink:label="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_CD94C357A95C2DE68541839585CCEF6D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Relationship to Entity [Domain]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_CD94C357A95C2DE68541839585CCEF6D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_CD94C357A95C2DE68541839585CCEF6D" xlink:to="lab_us-gaap_TitleOfIndividualWithRelationshipToEntityDomain_CD94C357A95C2DE68541839585CCEF6D" xlink:type="arc" />
    <link:label id="lab_us-gaap_DirectorMember_5A08FF6CC294525FCE52839585CCDF87_terseLabel_en-US" xlink:label="lab_us-gaap_DirectorMember_5A08FF6CC294525FCE52839585CCDF87" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non Employee Directors</link:label>
    <link:label id="lab_us-gaap_DirectorMember_5A08FF6CC294525FCE52839585CCDF87_label_en-US" xlink:label="lab_us-gaap_DirectorMember_5A08FF6CC294525FCE52839585CCDF87" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Director [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_DirectorMember" xlink:label="loc_us-gaap_DirectorMember_5A08FF6CC294525FCE52839585CCDF87" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_DirectorMember_5A08FF6CC294525FCE52839585CCDF87" xlink:to="lab_us-gaap_DirectorMember_5A08FF6CC294525FCE52839585CCDF87" xlink:type="arc" />
    <link:label id="lab_us-gaap_EmployeeStockOptionMember_383C2CB3B124B2982B6A839585CDCB46_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember_383C2CB3B124B2982B6A839585CDCB46" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Non-Qualified Stock Options</link:label>
    <link:label id="lab_us-gaap_EmployeeStockOptionMember_383C2CB3B124B2982B6A839585CDCB46_label_en-US" xlink:label="lab_us-gaap_EmployeeStockOptionMember_383C2CB3B124B2982B6A839585CDCB46" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Employee Stock Option [Member]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EmployeeStockOptionMember" xlink:label="loc_us-gaap_EmployeeStockOptionMember_383C2CB3B124B2982B6A839585CDCB46" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_EmployeeStockOptionMember_383C2CB3B124B2982B6A839585CDCB46" xlink:to="lab_us-gaap_EmployeeStockOptionMember_383C2CB3B124B2982B6A839585CDCB46" xlink:type="arc" />
    <link:label id="lab_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94_terseLabel_en-US" xlink:label="lab_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of stock-based incentive plans</link:label>
    <link:label id="lab_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94_label_en-US" xlink:label="lab_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Stock Incentive Plans</link:label>
    <link:label id="lab_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94_documentation_en-US" xlink:label="lab_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the number of stock based incentive plans operated by the entity after incorporating and superseding its previous plans.</link:label>
    <link:loc xlink:href="ssd-20170930.xsd#ssd_NumberOfStockIncentivePlans" xlink:label="loc_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94" xlink:to="lab_ssd_NumberOfStockIncentivePlans_B9854A871AC812527C97839585CD8E94" xlink:type="arc" />
    <link:label id="lab_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0_terseLabel_en-US" xlink:label="lab_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Number of stock option plans superseded</link:label>
    <link:label id="lab_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0_label_en-US" xlink:label="lab_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Number of Stock Option Plans Superseded</link:label>
    <link:label id="lab_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0_documentation_en-US" xlink:label="lab_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Represents the number of stock option plans superseded by the entity and replaced by another plan during the period.</link:label>
    <link:loc xlink:href="ssd-20170930.xsd#ssd_NumberOfStockOptionPlansSuperseded" xlink:label="loc_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0" xlink:to="lab_ssd_NumberOfStockOptionPlansSuperseded_D50FCC14ED5156442AD8839585CD9DF0" xlink:type="arc" />
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    <link:label id="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_50AD8BE8FCAFD68E250C839585DB07F9_label_en-US" xlink:label="lab_us-gaap_LondonInterbankOfferedRateLIBORMember_50AD8BE8FCAFD68E250C839585DB07F9" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">London Interbank Offered Rate (LIBOR) [Member]</link:label>
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    <link:label id="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0791AADDC4E4805E4A2B839585DC0058_terseLabel_en-US" xlink:label="lab_us-gaap_LineOfCreditFacilityCommitmentFeePercentage_0791AADDC4E4805E4A2B839585DC0058" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Facility fees on the available commitment of the facility (as a percent)</link:label>
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    <link:label id="lab_us-gaap_LiabilitiesCurrentAbstract_3CC71622B2EE4810F47C839586B7EB42_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrentAbstract_3CC71622B2EE4810F47C839586B7EB42" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current [Abstract]</link:label>
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    <link:label id="lab_us-gaap_AccruedLiabilitiesCurrent_872EE30E2C0DEEC8676B839586B7D008_label_en-US" xlink:label="lab_us-gaap_AccruedLiabilitiesCurrent_872EE30E2C0DEEC8676B839586B7D008" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Accrued Liabilities, Current</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_WorkersCompensationLiabilityCurrent" xlink:label="loc_us-gaap_WorkersCompensationLiabilityCurrent_700B783557E3082F23C7839586B82A15" xlink:type="locator" />
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    <link:label id="lab_us-gaap_LiabilitiesCurrent_CFB02CC5C1466EE2942F839586B8E19A_totalLabel_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_CFB02CC5C1466EE2942F839586B8E19A" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total current liabilities</link:label>
    <link:label id="lab_us-gaap_LiabilitiesCurrent_CFB02CC5C1466EE2942F839586B8E19A_label_en-US" xlink:label="lab_us-gaap_LiabilitiesCurrent_CFB02CC5C1466EE2942F839586B8E19A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Liabilities, Current</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_LiabilitiesCurrent" xlink:label="loc_us-gaap_LiabilitiesCurrent_CFB02CC5C1466EE2942F839586B8E19A" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_CapitalLeaseObligationsNoncurrent" xlink:label="loc_us-gaap_CapitalLeaseObligationsNoncurrent_4757540297C6A80DCC43839586B8A8DE" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A6B8C3EBA58C6BBB1027C494BBDBCDA8_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A6B8C3EBA58C6BBB1027C494BBDBCDA8" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2018</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A6B8C3EBA58C6BBB1027C494BBDBCDA8" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A6B8C3EBA58C6BBB1027C494BBDBCDA8" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearTwo_A6B8C3EBA58C6BBB1027C494BBDBCDA8" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_C1607BEE4E401968012CC494BBDB4995_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_C1607BEE4E401968012CC494BBDB4995" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2019</link:label>
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_C1607BEE4E401968012CC494BBDB4995" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearThree_C1607BEE4E401968012CC494BBDB4995" xlink:type="arc" />
    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_AC99528178E89424D77FC494BBDBA077_terseLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_AC99528178E89424D77FC494BBDBA077" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">2020</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour" xlink:label="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFour_AC99528178E89424D77FC494BBDBA077" xlink:type="locator" />
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    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_C98A2FD9DDB6D0D9F8BAC494BBDBBEBC" xlink:to="lab_us-gaap_FiniteLivedIntangibleAssetsAmortizationExpenseYearFive_C98A2FD9DDB6D0D9F8BAC494BBDBBEBC" xlink:type="arc" />
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    <link:label id="lab_us-gaap_FiniteLivedIntangibleAssetsNet_433D41519F48EBE76CFDC494BBDBEB42_totalLabel_en-US" xlink:label="lab_us-gaap_FiniteLivedIntangibleAssetsNet_433D41519F48EBE76CFDC494BBDBEB42" xlink:role="http://www.xbrl.org/2003/role/totalLabel" xlink:type="resource" xml:lang="en-US">Total</link:label>
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    <link:label id="lab_us-gaap_RestrictedStockMember_520EA807FCC50F8920FA839586671DD0_verboseLabel_en-US" xlink:label="lab_us-gaap_RestrictedStockMember_520EA807FCC50F8920FA839586671DD0" xlink:role="http://www.xbrl.org/2003/role/verboseLabel" xlink:type="resource" xml:lang="en-US">Restricted Stock Units</link:label>
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_5349A1A373ADF008289183958667B107_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_5349A1A373ADF008289183958667B107" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Requisite service period</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardAwardRequisiteServicePeriod1_5349A1A373ADF008289183958667B107" xlink:type="locator" />
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    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_99E5E95E96A1A6B4CB58839586670623_terseLabel_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_99E5E95E96A1A6B4CB58839586670623" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Expiration period</link:label>
    <link:label id="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_99E5E95E96A1A6B4CB58839586670623_label_en-US" xlink:label="lab_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_99E5E95E96A1A6B4CB58839586670623" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Expiration Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod" xlink:label="loc_us-gaap_SharebasedCompensationArrangementBySharebasedPaymentAwardExpirationPeriod_99E5E95E96A1A6B4CB58839586670623" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_5FB5623886250110116C839586671764_terseLabel_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_5FB5623886250110116C839586671764" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Maximum common stock shares that may be issued under plan (in shares)</link:label>
    <link:label id="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_5FB5623886250110116C839586671764_label_en-US" xlink:label="lab_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_5FB5623886250110116C839586671764" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation Arrangement by Share-based Payment Award, Number of Shares Authorized</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized" xlink:label="loc_us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardNumberOfSharesAuthorized_5FB5623886250110116C839586671764" xlink:type="locator" />
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_AllocatedShareBasedCompensationExpense" xlink:label="loc_us-gaap_AllocatedShareBasedCompensationExpense_DF89B5C379683A5235888395866739CB" xlink:type="locator" />
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    <link:label id="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_ABF5FDDF7F64DB379197839586679D41_terseLabel_en-US" xlink:label="lab_us-gaap_EmployeeServiceShareBasedCompensationTaxBenefitFromCompensationExpense_ABF5FDDF7F64DB379197839586679D41" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Less: Tax benefit of stock-based compensation expense in provision for income taxes</link:label>
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    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems" xlink:label="loc_us-gaap_EntityWideInformationRevenueFromExternalCustomerLineItems_BAD060390F24F69F1E7283958677DC8A" xlink:type="locator" />
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    <link:label id="lab_ssd_ServiceSalesPercentageOfNetSales_63030CA209BD40B8EB438395867713CA_terseLabel_en-US" xlink:label="lab_ssd_ServiceSalesPercentageOfNetSales_63030CA209BD40B8EB438395867713CA" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Service sales percentage of net sales, less than</link:label>
    <link:label id="lab_ssd_ServiceSalesPercentageOfNetSales_63030CA209BD40B8EB438395867713CA_label_en-US" xlink:label="lab_ssd_ServiceSalesPercentageOfNetSales_63030CA209BD40B8EB438395867713CA" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Service Sales Percentage of Net Sales</link:label>
    <link:label id="lab_ssd_ServiceSalesPercentageOfNetSales_63030CA209BD40B8EB438395867713CA_documentation_en-US" xlink:label="lab_ssd_ServiceSalesPercentageOfNetSales_63030CA209BD40B8EB438395867713CA" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">Percentage of net sales attributed to services sales.</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_CE4A6A144084865F25E3E336355D5580_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_CE4A6A144084865F25E3E336355D5580" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of carrying values of inventories</link:label>
    <link:label id="lab_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_CE4A6A144084865F25E3E336355D5580_label_en-US" xlink:label="lab_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_CE4A6A144084865F25E3E336355D5580" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Inventory, Current [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfInventoryCurrentTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfInventoryCurrentTableTextBlock_CE4A6A144084865F25E3E336355D5580" xlink:type="locator" />
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    <link:label id="lab_us-gaap_RestrictedStockMember_ECC9DEBB764071C41FD0E336344FED01_terseLabel_en-US" xlink:label="lab_us-gaap_RestrictedStockMember_ECC9DEBB764071C41FD0E336344FED01" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Restricted Stock</link:label>
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    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_0118EA32D1631118CEC6E336344F8B24_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_0118EA32D1631118CEC6E336344F8B24" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Schedule of unvested restricted stock unit activity</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_0118EA32D1631118CEC6E336344F8B24_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_0118EA32D1631118CEC6E336344F8B24" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Schedule of Share-based Compensation, Restricted Stock Units Award Activity [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock_0118EA32D1631118CEC6E336344F8B24" xlink:type="locator" />
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    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_091A7B986F2E2939BAABE336344F6569_terseLabel_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_091A7B986F2E2939BAABE336344F6569" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Summary of stock option activity</link:label>
    <link:label id="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_091A7B986F2E2939BAABE336344F6569_label_en-US" xlink:label="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_091A7B986F2E2939BAABE336344F6569" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Share-based Compensation, Stock Options, Activity [Table Text Block]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock" xlink:label="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_091A7B986F2E2939BAABE336344F6569" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_091A7B986F2E2939BAABE336344F6569" xlink:to="lab_us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock_091A7B986F2E2939BAABE336344F6569" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillRollForward_35BBFB12599465074012839585E72C8D_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillRollForward_35BBFB12599465074012839585E72C8D" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Goodwill</link:label>
    <link:label id="lab_us-gaap_GoodwillRollForward_35BBFB12599465074012839585E72C8D_label_en-US" xlink:label="lab_us-gaap_GoodwillRollForward_35BBFB12599465074012839585E72C8D" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill [Roll Forward]</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillRollForward" xlink:label="loc_us-gaap_GoodwillRollForward_35BBFB12599465074012839585E72C8D" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_GoodwillRollForward_35BBFB12599465074012839585E72C8D" xlink:to="lab_us-gaap_GoodwillRollForward_35BBFB12599465074012839585E72C8D" xlink:type="arc" />
    <link:label id="lab_us-gaap_Goodwill_E6D04050EBD815404FBF839585E75C19_periodStartLabel_en-US" xlink:label="lab_us-gaap_Goodwill_E6D04050EBD815404FBF839585E75C19" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance at the beginning of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_E6D04050EBD815404FBF839585E75C19" xlink:type="locator" />
    <link:labelArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="loc_us-gaap_Goodwill_E6D04050EBD815404FBF839585E75C19" xlink:to="lab_us-gaap_Goodwill_E6D04050EBD815404FBF839585E75C19" xlink:type="arc" />
    <link:label id="lab_us-gaap_GoodwillAcquiredDuringPeriod_BE89CE3B0821DEC49F6A839585E7DAA6_terseLabel_en-US" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_BE89CE3B0821DEC49F6A839585E7DAA6" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquisitions</link:label>
    <link:label id="lab_us-gaap_GoodwillAcquiredDuringPeriod_BE89CE3B0821DEC49F6A839585E7DAA6_label_en-US" xlink:label="lab_us-gaap_GoodwillAcquiredDuringPeriod_BE89CE3B0821DEC49F6A839585E7DAA6" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill, Acquired During Period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillAcquiredDuringPeriod" xlink:label="loc_us-gaap_GoodwillAcquiredDuringPeriod_BE89CE3B0821DEC49F6A839585E7DAA6" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GoodwillOtherIncreaseDecrease_466698EE5DEEE84AA375839585E7778A_negatedLabel_en-US" xlink:label="lab_us-gaap_GoodwillOtherIncreaseDecrease_466698EE5DEEE84AA375839585E7778A" xlink:role="http://www.xbrl.org/2009/role/negatedLabel" xlink:type="resource" xml:lang="en-US">Reclassifications</link:label>
    <link:label id="lab_us-gaap_GoodwillOtherIncreaseDecrease_466698EE5DEEE84AA375839585E7778A_label_en-US" xlink:label="lab_us-gaap_GoodwillOtherIncreaseDecrease_466698EE5DEEE84AA375839585E7778A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill, Other Increase (Decrease)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillOtherIncreaseDecrease" xlink:label="loc_us-gaap_GoodwillOtherIncreaseDecrease_466698EE5DEEE84AA375839585E7778A" xlink:type="locator" />
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    <link:label id="lab_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_A06130ACB950C480705B839585E7BD47_label_en-US" xlink:label="lab_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_A06130ACB950C480705B839585E7BD47" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Goodwill, Foreign Currency Translation Gain (Loss)</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_GoodwillForeignCurrencyTranslationGainLoss" xlink:label="loc_us-gaap_GoodwillForeignCurrencyTranslationGainLoss_A06130ACB950C480705B839585E7BD47" xlink:type="locator" />
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    <link:label id="lab_us-gaap_Goodwill_12F86F5F48E2646242F7839585E732A9_periodEndLabel_en-US" xlink:label="lab_us-gaap_Goodwill_12F86F5F48E2646242F7839585E732A9" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel" xlink:type="resource" xml:lang="en-US">Balance at the end of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_Goodwill" xlink:label="loc_us-gaap_Goodwill_12F86F5F48E2646242F7839585E732A9" xlink:type="locator" />
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    <link:label id="lab_ssd_IntangibleAssetsRollForward_3A4C9274EEFCF7BB5BD1839585E7C66A_terseLabel_en-US" xlink:label="lab_ssd_IntangibleAssetsRollForward_3A4C9274EEFCF7BB5BD1839585E7C66A" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Intangible Assets</link:label>
    <link:label id="lab_ssd_IntangibleAssetsRollForward_3A4C9274EEFCF7BB5BD1839585E7C66A_label_en-US" xlink:label="lab_ssd_IntangibleAssetsRollForward_3A4C9274EEFCF7BB5BD1839585E7C66A" xlink:role="http://www.xbrl.org/2003/role/label" xlink:type="resource" xml:lang="en-US">Intangible Assets [Roll Forward]</link:label>
    <link:label id="lab_ssd_IntangibleAssetsRollForward_3A4C9274EEFCF7BB5BD1839585E7C66A_documentation_en-US" xlink:label="lab_ssd_IntangibleAssetsRollForward_3A4C9274EEFCF7BB5BD1839585E7C66A" xlink:role="http://www.xbrl.org/2003/role/documentation" xlink:type="resource" xml:lang="en-US">A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.</link:label>
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    <link:label id="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_58CB9F1C6541090ADF94839585E799FA_periodStartLabel_en-US" xlink:label="lab_us-gaap_IntangibleAssetsNetExcludingGoodwill_58CB9F1C6541090ADF94839585E799FA" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel" xlink:type="resource" xml:lang="en-US">Balance at the beginning of the period</link:label>
    <link:loc xlink:href="http://xbrl.fasb.org/us-gaap/2017/elts/us-gaap-2017-01-31.xsd#us-gaap_IntangibleAssetsNetExcludingGoodwill" xlink:label="loc_us-gaap_IntangibleAssetsNetExcludingGoodwill_58CB9F1C6541090ADF94839585E799FA" xlink:type="locator" />
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    <link:label id="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_5D7D6148C625BD1F55FC839585E88EC4_terseLabel_en-US" xlink:label="lab_us-gaap_FinitelivedIntangibleAssetsAcquired1_5D7D6148C625BD1F55FC839585E88EC4" xlink:role="http://www.xbrl.org/2003/role/terseLabel" xlink:type="resource" xml:lang="en-US">Acquisitions</link:label>
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