Skip to content

Purlins & girts

WS Z purlins and girts

WS cold-formed Z purlins Z125–Z300 with unequal flanges for lapping and continuity, 1.2–3.0 mm galvanized – auto-size line from 100 to 400 mm deep.

United States Australia / NZ Europe

Request a quotation Specifications

Galvanized cold-formed Z purlins of several sizes

Z purlins – detail

Z purlins – view

Z purlins

Standard sizes Z125 to Z300
Unequal flanges E / F nest for laps
Lip angle 95–115°
Auto-size line: H 100–400, T 1.2–4.0 mm
Oval holes 14 × 22 or 16 × 24 mm

Built for continuous roofs

Z sections have one wider and one narrower flange so two sections nest into each other at laps over the rafters. Lapped Z purlins act as continuous beams – lighter purlins for the same span, the standard secondary system for pre-engineered buildings.

C and Z purlin section dimensions — Section parameters H, E, F, L, lip angle and hole centres K.

Standard sizes (mm)

WS Z purlins – standard sizes
No.	Type	H	E	F	L	T	Lip angle	K (holes)
1	Z125	125	52	58	16–20	1.2–3.0	95–115	50–55
2	Z150	150	52	58	16–20	1.2–3.0	95–115	50–80
3	Z175	175	52	58	16–20	1.5–3.0	95–115	50–90
4	Z200	200	52	58	16–20	1.5–3.0	95–115	50–120
5	Z175	175	62	68	16–20	1.5–3.0	95–115	50–90
6	Z200	200	62	68	16–20	1.5–3.0	95–115	50–120
7	Z250	250	62	68	16–20	1.5–3.0	95–115	50–160
8	Z200	200	72	78	16–20	1.5–3.0	95–115	50–120
9	Z250	250	72	78	16–20	1.5–3.0	95–115	50–160
10	Z300	300	72	78	16–20	1.5–3.0	95–115	50–210

Auto-size Z line: H 100–400 mm, E / F 50–130 mm, L 15–25 mm, T 1.2–4.0 mm, lip 95–115°, K 40–320 mm. Holes: oval 14 × 22 mm or 16 × 24 mm.

Standards and requirements by market

Codes World Steel designs, fabricates and documents this product to – and the key geometric and load requirements in each market.

United States

AISI S100Cold-formed steel structural members
ASTM A653 / A1011Galvanized / hot-rolled sheet for purlins
MBMA ManualMetal building systems practice

All United States standards →

Australia / NZ

AS/NZS 4600Cold-formed steel structures
AS 1397G450 / G550 metallic-coated sheet
AS/NZS 5131 WSC certifiedFabrication and erection

All Australia & New Zealand standards →

Europe

EN 1993-1-3Cold-formed members and sheeting
EN 10346S350GD / S450GD + Z coated steel
EN 1090-4Cold-formed structural steel elements

All Europe standards →

Summary for orientation only – the project specification, the adopted code edition and the authority having jurisdiction govern.

Finishes

Finish	Standards / notes
Galvanized	Z180–Z350 (G60–G90) per environment

Frequently asked questions

Why use Z instead of C purlins?

Z purlins can be lapped over rafters to act as continuous beams, which usually saves weight on multi-bay roofs.

Specifications

Sizes: Z125–Z300 standard; H 100–400 auto-size
Thickness: 1.2–3.0 mm (auto-size to 4.0 mm)
Flanges: E 52–72 / F 58–78 mm
Lip: 16–20 mm at 95–115°
Holes: Oval 14 × 22 or 16 × 24 mm

Certified fabrication

IAS AC472Certificate MB-268International Accreditation Service (IAS)Valid to 1 Aug 2027

AS/NZS 5131 CC3Certificate BMP 827566BSI Group Australia & New Zealand (Benchmark Product Certification)Valid to 31 Jul 2030

Documents supplied

Coil mill certificates
Cutting and punching list
Packing list with member marks

For a quotation, send us

Purlin layout with lap lengths
Section size, thickness, length and hole positions
Coating requirement

Request a quotation

Delivery terms

FCAFree Carrier FOBFree On Board CFRCost and Freight CIFCost, Insurance and Freight CPTCarriage Paid To CIPCarriage and Insurance Paid To

Quoted under Incoterms® 2020 from Ho Chi Minh City – other terms by project.

All 11 Incoterms® 2020 rules →

Purlins & girts

Next project

Planning a steel structure abroad?

Send us your drawings or IFC model – our estimating team replies with fabrication scope, schedule and delivered price.

Request a quotation +84 902 881 833