<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2026 Workiva-->
<!--r:019ed5e8-76ac-7ec6-8d09-14a1bdf329ea,g:484d6cc3-11bb-459e-84fc-07b514ed4a9d-->
<link:linkbase xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xbrl.org/2003/linkbase http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd">
  <link:roleRef roleURI="http://www.lbfoster.com/role/Cover" xlink:type="simple" xlink:href="fstr-20260728.xsd#Cover"/>
  <link:presentationLink xlink:role="http://www.lbfoster.com/role/Cover" xlink:type="extended">
    <link:loc xlink:type="locator" xlink:label="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CoverAbstract"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentType_019ed5e8-76ac-76a7-8787-316b98956517" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentType"/>
    <link:presentationArc order="1" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_DocumentType_019ed5e8-76ac-76a7-8787-316b98956517" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_DocumentPeriodEndDate_019ed5e8-76ac-7760-be5d-b907b2619131" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_DocumentPeriodEndDate"/>
    <link:presentationArc order="2" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_DocumentPeriodEndDate_019ed5e8-76ac-7760-be5d-b907b2619131" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityRegistrantName_019ed5e8-76ac-7fce-824d-d28ce6bdf10e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityRegistrantName"/>
    <link:presentationArc order="3" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityRegistrantName_019ed5e8-76ac-7fce-824d-d28ce6bdf10e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityIncorporationStateCountryCode_019ed5e8-76ac-760d-9440-7bc72caf6ea7" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityIncorporationStateCountryCode"/>
    <link:presentationArc order="4" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityIncorporationStateCountryCode_019ed5e8-76ac-760d-9440-7bc72caf6ea7" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityFileNumber_019ed5e8-76ac-7751-a0a1-d8777adc3b8e" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityFileNumber"/>
    <link:presentationArc order="5" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityFileNumber_019ed5e8-76ac-7751-a0a1-d8777adc3b8e" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityTaxIdentificationNumber_019ed5e8-76ac-7f07-bf2e-cbc00f22fa2f" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityTaxIdentificationNumber"/>
    <link:presentationArc order="6" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityTaxIdentificationNumber_019ed5e8-76ac-7f07-bf2e-cbc00f22fa2f" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressPostalZipCode_019ed5e8-76ac-782b-9a5d-c5f006344e50" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressPostalZipCode"/>
    <link:presentationArc order="7" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityAddressPostalZipCode_019ed5e8-76ac-782b-9a5d-c5f006344e50" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_TradingSymbol_019ed5e8-76ac-74e7-8358-12008c83e7f9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_TradingSymbol"/>
    <link:presentationArc order="8" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_TradingSymbol_019ed5e8-76ac-74e7-8358-12008c83e7f9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SecurityExchangeName_019ed5e8-76ac-7038-8ea2-36b224d774e8" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SecurityExchangeName"/>
    <link:presentationArc order="9" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_SecurityExchangeName_019ed5e8-76ac-7038-8ea2-36b224d774e8" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_Security12bTitle_019ed5e8-76ac-7d9b-a44f-3d8d808a4701" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_Security12bTitle"/>
    <link:presentationArc order="10" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_Security12bTitle_019ed5e8-76ac-7d9b-a44f-3d8d808a4701" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressAddressLine1_019ed5e8-76ac-7b78-abe4-e036173ccf00" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressAddressLine1"/>
    <link:presentationArc order="11" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityAddressAddressLine1_019ed5e8-76ac-7b78-abe4-e036173ccf00" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressCityOrTown_019ed5e8-76ac-763f-a997-931a18974a09" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressCityOrTown"/>
    <link:presentationArc order="12" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityAddressCityOrTown_019ed5e8-76ac-763f-a997-931a18974a09" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityAddressStateOrProvince_019ed5e8-76ac-7965-9c5b-3021f7259c16" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityAddressStateOrProvince"/>
    <link:presentationArc order="13" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityAddressStateOrProvince_019ed5e8-76ac-7965-9c5b-3021f7259c16" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_CityAreaCode_019ed5e8-76ac-7fd7-80fa-419889b41961" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_CityAreaCode"/>
    <link:presentationArc order="14" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_CityAreaCode_019ed5e8-76ac-7fd7-80fa-419889b41961" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_LocalPhoneNumber_019ed5e8-76ac-763e-9e8f-389e3c67c7f1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_LocalPhoneNumber"/>
    <link:presentationArc order="15" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_LocalPhoneNumber_019ed5e8-76ac-763e-9e8f-389e3c67c7f1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_WrittenCommunications_019ed5e8-76ac-79a7-91f8-4444a1ef8d45" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_WrittenCommunications"/>
    <link:presentationArc order="16" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_WrittenCommunications_019ed5e8-76ac-79a7-91f8-4444a1ef8d45" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_SolicitingMaterial_019ed5e8-76ac-7c6a-997b-cb399b37a206" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_SolicitingMaterial"/>
    <link:presentationArc order="17" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_SolicitingMaterial_019ed5e8-76ac-7c6a-997b-cb399b37a206" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementTenderOffer_019ed5e8-76ac-7b40-af57-e13014709920" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementTenderOffer"/>
    <link:presentationArc order="18" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_PreCommencementTenderOffer_019ed5e8-76ac-7b40-af57-e13014709920" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_PreCommencementIssuerTenderOffer_019ed5e8-76ac-7553-8512-c6c52a7fb8e6" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_PreCommencementIssuerTenderOffer"/>
    <link:presentationArc order="19" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_PreCommencementIssuerTenderOffer_019ed5e8-76ac-7553-8512-c6c52a7fb8e6" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityEmergingGrowthCompany_019ed5e8-76ac-7c0a-9bdd-41d5ef7ff6a9" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityEmergingGrowthCompany"/>
    <link:presentationArc order="20" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityEmergingGrowthCompany_019ed5e8-76ac-7c0a-9bdd-41d5ef7ff6a9" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_EntityCentralIndexKey_019ed5e8-76ac-7c9c-9f3a-0a1c97f0298b" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_EntityCentralIndexKey"/>
    <link:presentationArc order="21" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_EntityCentralIndexKey_019ed5e8-76ac-7c9c-9f3a-0a1c97f0298b" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
    <link:loc xlink:type="locator" xlink:label="loc_dei_AmendmentFlag_019ed5e8-76ac-7185-ae02-9b0ad849aaf1" xlink:href="https://xbrl.sec.gov/dei/2026/dei-2026.xsd#dei_AmendmentFlag"/>
    <link:presentationArc order="22" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="loc_dei_CoverAbstract_019ed5e8-76ac-7b37-9393-384edda16d3d" xlink:to="loc_dei_AmendmentFlag_019ed5e8-76ac-7185-ae02-9b0ad849aaf1" xlink:type="arc" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
  </link:presentationLink>
</link:linkbase>
