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- 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.
Standard sizes (mm)
| 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.
Norme e requisiti per mercato
I codici secondo cui World Steel progetta, fabbrica e documenta questo prodotto, con i principali requisiti geometrici e di carico in ciascun mercato.
Stati Uniti
- AISI S100Cold-formed steel structural members
- ASTM A653 / A1011Galvanized / hot-rolled sheet for purlins
- MBMA ManualMetal building systems practice
Australia / NZ
- AS/NZS 4600Cold-formed steel structures
- AS 1397G450 / G550 metallic-coated sheet
- AS/NZS 5131 Certificata WSCFabrication and erection
Europa
- EN 1993-1-3Cold-formed members and sheeting
- EN 10346S350GD / S450GD + Z coated steel
- EN 1090-4Cold-formed structural steel elements
Sintesi solo orientativa: prevalgono il capitolato di progetto, l'edizione del codice adottata e l'autorità competente.
Finiture
| Finitura | Norme / note |
|---|---|
| Galvanized | Z180–Z350 (G60–G90) per environment |
Domande frequenti
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.
IAS AC472
AS/NZS 5131 CC3
