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Pre-Engineered Steel Buildings

Secondary Members – Purlins, Girts & Struts

Cold-formed C and Z members that support roof and wall cladding.

Secondary Members – Purlins, Girts & Struts

Cold-formed C, Z and U purlins and girts, struts and girder beams that carry the cladding and tie the frames together.

Secondary members transfer cladding loads to the primary frames and tie the frames together. Purlins and girts are cold-formed C, Z or U sections; struts and girder beams complete the system. Purlin spacing is typically 1.0–1.4 m depending on frame spacing and building loads.

Features & components

  • C, Z and U cold-formed purlins and girts
  • Struts and girder beams
  • Typical purlin spacing 1.0 – 1.4 m
  • Bracing cables to locate and link the rafter frames

Where we supply Purlins, girts & struts

Global Markets →
North America · GDP #1United StatesThe world's largest economy and the largest market for metal building systems.HighMFNNorth America · GDP #11CanadaA CPTPP partner with demanding cold-climate and welding-certification rules.MediumCPTPPOceania · GDP #12AustraliaAS/NZS 5131 CC3-certified supply for a large, quality-driven market.HighAANZFTA · CPTPP · RCEPNorth America · GDP #13MexicoNearshoring hub of North America and a CPTPP partner of Vietnam.MediumCPTPPEurope · GDP #21PolandCentral Europe's logistics and manufacturing powerhouse.MediumEVFTAOceania · GDP #54New ZealandSeismic structural steel to NZS 3404 and AS/NZS 5131.HighAANZFTA · CPTPP · RCEPNorth America · GDP #126Trinidad and TobagoEnergy-driven economy with steady demand for industrial and commercial buildings.HighMFN

Related content

Steel products

Lapped Z purlins bolted to a rafter cleatBolts & fastenersPurlin boltsStack of lipped C studs and U tracksLight gauge steelC studs & tracksLGS wall panel with window opening, lintel and strap bracingLight gauge steelWall panelsLGS floor cassette with joists and part deckLight gauge steelFloor joistsRow of LGS roof trusses with top-hat battensLight gauge steelRoof trussesStacks of top-hat roof battens and furring channelsLight gauge steelBattens & furringLGS stud wall framingLight gauge steelInfill walls & partitionsLGS studs in track with hold-down, anchor and strapLight gauge steelConnections & anchorsVolumetric LGS module frame with floor and openingsLight gauge steelPanels & modulesTwo-storey LGS house frame with trussesLight gauge steelLGS houses & buildingsGalvanized cold-formed C purlins of several sizesPurlins & girtsC purlinsGalvanized cold-formed Z purlins of several sizesPurlins & girtsZ purlins

PEB knowledge

Lapped Z purlins spanning between rafters on a pre-engineered building roofComponentsPurlinsExploded 3D model of a PEB showing rigid frames, endwall framing, purlins, girts, bracing, roof and wall sheeting, gutters, doors and a crane runwayFundamentalsPEB anatomyGalvanized steel coils and roll-formed Z and C purlins in a fabrication shopMaterialsCold-formed steelHorizontal Z girts spanning between frame columns on the side wall of a PEBComponentsGirtsEave strut running along the top of the side wall where roof and wall meet on a PEBComponentsEave strutsGalvanized Z purlins, girts and eave struts highlighted in a PEB 3D modelWSC productsSecondary framingCold roll forming line producing Z purlins from galvanized coil with a punching unit and flying shearFabricationCold roll formingEndwall columns and endwall rafter of a pre-engineered building highlighted in a 3D modelComponentsEndwall framing
ProductsPEB buildingsPrimary framingRoof & Wall Cladding
SolutionsExport packingLight gauge steelSteel sourcingApproval drawingsFabricationCoastal & island projectsCar parks & carportsConveyor systemsASRS high-bay warehousesDirect from the factoryManufacturing plantsMachine platforms
MarketsUnited StatesCanadaAustraliaMexicoPolandNew ZealandTrinidad and Tobago

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