Cold-Formed Galvanized Z Purlins for Continuous Multi-Span Roofs
Galvanized Z purlins feature asymmetric flanges (narrow/broad) allowing them to nest together over support frames. This creates a continuous structural beam that dramatically reduces mid-span deflection and permits smaller sections or wider frame spacing, saving up to 15% overall steel weight on large industrial roofs.
Galvanized Z Purlins (Lapped Continuous Span): Galvanized Z Purlins (Lapped Continuous Span) is a certified building envelope system manufactured according to TS EN 14509 and CE standards, featuring a S350GD+Z / S390GD Yüksek Mukavemetli Çelik core, Euroclass A1 Sınıfı (Hiç Yanmaz Çelik) fire performance rating, and Z100, Z140, Z160, Z180, Z200, Z250, Z300, Z350, Z400 mm modular cover width. Custom produced from 2.00m to 13.50m with zero jobsite waste and full export logistics.
Select Secondary Steel Profile for Your Frame Spans
01 Product Overview & Primary Use
Galvanized Z purlins feature asymmetric flanges (narrow/broad) allowing them to nest together over support frames. This creates a continuous structural beam that dramatically reduces mid-span deflection and permits smaller sections or wider frame spacing, saving up to 15% overall steel weight on large industrial roofs.
Engineered from high-yield S350GD+Z galvanized structural steel, Galvanized Z Purlins (Lapped Continuous Span) reduces structural secondary steel weight by up to 40% while accelerating bolting speed with factory-punched holes.
02 Section Geometry & Dimensions
Cold-formed C and Z purlins are roll-formed in thicknesses from 1.50mm to 3.00mm and lengths from 1.00m to 14.00m with factory-punched bolt holes.
- ▪ Section / Depth Range: Z100, Z140, Z160, Z180, Z200, Z250, Z300, Z350, Z400 mm
- ▪ Production Length: 14.50 m
- ▪ Connection Detailing: Binili (Lapped) İç İçe Geçmeli Civatalı Montaj
03 Steel Grade, Yield Strength & Section Properties
Roll-formed from S350GD high-yield structural steel with Z275 zinc coating, eliminating primer painting and accelerating bolted installation.
04 Galvanized Coating & Corrosion Protection
Manufactured from high-yield S320GD and S350GD+Z structural steel conforming to EN 10346 with continuous hot-dip galvanized coating (Z100 to Z275 g/m²). Eliminates on-site blast cleaning and protective painting while providing robust corrosion protection in demanding industrial atmospheres.
05 Z-Purlin Gauge, Weight & Continuous System Price Table
Z-Section purlins (Z100 to Z400) continuous lap system specifications, nested overlap ratios, steel grades and reference unit rates per kg.
| Thickness | Unit Price | Steel Grade & Yield | Zinc Coating | Weight Range (Z 100-300) | Lap Detailing |
|---|---|---|---|---|---|
| 1.5 mm |
$1.56 / kg
EXW Turkey
|
S350GD+Z (350 MPa) | Z100 – Z275 gr/m² | 2.45 – 5.80 kg/m | 0.16L – 0.20L Continuous Lap |
| 2 mm |
$1.60 / kg
EXW Turkey
|
S350GD+Z (350 MPa) | Z140 – Z275 gr/m² | 3.25 – 7.65 kg/m | 0.16L – 0.20L Continuous Lap |
| 2.5 mm |
$1.68 / kg
EXW Turkey
|
S350GD+Z (350 MPa) | Z200 – Z275 gr/m² | 4.05 – 9.50 kg/m | 0.16L – 0.20L Continuous Lap |
| 3 mm |
$1.80 / kg
EXW Turkey
|
S350GD+Z (350 MPa) | Z275 gr/m² | 4.85 – 11.35 kg/m | 0.16L – 0.20L Continuous Lap |
Z-Section Purlin (Continuous Lap) Dimensions & Weight Table
Continuous lapped Z-purlin nested flange specifications and linear weights delivering up to 15% steel savings.
| Profile Section Code Dimensions (h × b × c × t) | Thickness (t) | Unit Weight kg/m | Inertia (Ix) cm⁴ | Section Mod (Wx) cm³ | Optimal Span metre |
|---|---|---|---|---|---|
|
Z 100 Series (Web: 100 mm)
100 × 48/53 × 15 mm
|
|||||
| Z 100x48-53x15x1.5 | 1.50 mm | 2.45 kg/m | 59.67 cm⁴ | 11.93 cm³ | 2.24 – 2.92 m |
| Z 100x48-53x15x2 | 2.00 mm | 3.25 kg/m | 79.04 cm⁴ | 15.81 cm³ | 2.46 – 3.22 m |
| Z 100x48-53x15x2.5 | 2.50 mm | 4.02 kg/m | 98.16 cm⁴ | 19.63 cm³ | 2.69 – 3.52 m |
| Z 100x48-53x15x3 | 3.00 mm | 4.78 kg/m | 117.03 cm⁴ | 23.41 cm³ | 2.92 – 3.82 m |
|
Z 150 Series (Web: 150 mm)
150 × 58/63 × 18 mm
|
|||||
| Z 150x58-63x18x1.5 | 1.50 mm | 3.35 kg/m | 172.40 cm⁴ | 22.99 cm³ | 3.35 – 4.38 m |
| Z 150x58-63x18x2 | 2.00 mm | 4.45 kg/m | 228.94 cm⁴ | 30.53 cm³ | 3.70 – 4.83 m |
| Z 150x58-63x18x2.5 | 2.50 mm | 5.52 kg/m | 285.01 cm⁴ | 38.00 cm³ | 4.04 – 5.28 m |
| Z 150x58-63x18x3 | 3.00 mm | 6.58 kg/m | 340.62 cm⁴ | 45.42 cm³ | 4.38 – 5.72 m |
|
Z 180 Series (Web: 180 mm)
180 × 58/63 × 18 mm
|
|||||
| Z 180x58-63x18x1.5 | 1.50 mm | 3.72 kg/m | 263.02 cm⁴ | 29.22 cm³ | 4.02 – 5.26 m |
| Z 180x58-63x18x2 | 2.00 mm | 4.94 kg/m | 349.57 cm⁴ | 38.84 cm³ | 4.43 – 5.79 m |
| Z 180x58-63x18x2.5 | 2.50 mm | 6.14 kg/m | 435.57 cm⁴ | 48.40 cm³ | 4.84 – 6.33 m |
| Z 180x58-63x18x3 | 3.00 mm | 7.32 kg/m | 521.01 cm⁴ | 57.89 cm³ | 5.26 – 6.87 m |
|
Z 200 Series (Web: 200 mm)
200 × 63/68 × 20 mm
|
|||||
| Z 200x63-68x20x1.5 | 1.50 mm | 4.25 kg/m | 355.85 cm⁴ | 35.59 cm³ | 4.47 – 5.84 m |
| Z 200x63-68x20x2 | 2.00 mm | 5.65 kg/m | 473.12 cm⁴ | 47.31 cm³ | 4.93 – 6.44 m |
| Z 200x63-68x20x2.5 | 2.50 mm | 7.02 kg/m | 589.71 cm⁴ | 58.97 cm³ | 5.38 – 7.03 m |
| Z 200x63-68x20x3 | 3.00 mm | 8.38 kg/m | 705.64 cm⁴ | 70.56 cm³ | 5.84 – 7.63 m |
|
Z 250 Series (Web: 250 mm)
250 × 68/73 × 20 mm
|
|||||
| Z 250x68-73x20x1.5 | 1.50 mm | 5.05 kg/m | 625.22 cm⁴ | 50.02 cm³ | 5.59 – 7.30 m |
| Z 250x68-73x20x2 | 2.00 mm | 6.70 kg/m | 831.81 cm⁴ | 66.55 cm³ | 6.16 – 8.05 m |
| Z 250x68-73x20x2.5 | 2.50 mm | 8.35 kg/m | 1037.50 cm⁴ | 83.00 cm³ | 6.73 – 8.79 m |
| Z 250x68-73x20x3 | 3.00 mm | 9.95 kg/m | 1242.27 cm⁴ | 99.38 cm³ | 7.30 – 9.54 m |
|
Z 300 Series (Web: 300 mm)
300 × 78/83 × 22 mm
|
|||||
| Z 300x78-83x22x1.5 | 1.50 mm | 5.95 kg/m | 1043.09 cm⁴ | 69.54 cm³ | 6.71 – 8.76 m |
| Z 300x78-83x22x2 | 2.00 mm | 7.90 kg/m | 1388.29 cm⁴ | 92.55 cm³ | 7.39 – 9.66 m |
| Z 300x78-83x22x2.5 | 2.50 mm | 9.85 kg/m | 1732.25 cm⁴ | 115.48 cm³ | 8.07 – 10.55 m |
| Z 300x78-83x22x3 | 3.00 mm | 11.75 kg/m | 2074.97 cm⁴ | 138.33 cm³ | 8.76 – 11.45 m |
|
Z 350 Series (Web: 350 mm)
350 × 80/85 × 25 mm
|
|||||
| Z 350x80-85x25x1.5 | 1.50 mm | 6.42 kg/m | 1544.89 cm⁴ | 88.28 cm³ | 7.82 – 10.22 m |
| Z 350x80-85x25x2 | 2.00 mm | 8.56 kg/m | 2056.86 cm⁴ | 117.54 cm³ | 8.62 – 11.27 m |
| Z 350x80-85x25x2.5 | 2.50 mm | 10.70 kg/m | 2567.35 cm⁴ | 146.71 cm³ | 9.42 – 12.31 m |
| Z 350x80-85x25x3 | 3.00 mm | 12.84 kg/m | 3076.35 cm⁴ | 175.79 cm³ | 10.22 – 13.35 m |
|
Z 400 Series (Web: 400 mm)
400 × 90/95 × 28 mm
|
|||||
| Z 400x90-95x28x1.5 | 1.50 mm | 7.30 kg/m | 2279.99 cm⁴ | 114.00 cm³ | 8.94 – 11.68 m |
| Z 400x90-95x28x2 | 2.00 mm | 9.73 kg/m | 3036.15 cm⁴ | 151.81 cm³ | 9.85 – 12.88 m |
| Z 400x90-95x28x2.5 | 2.50 mm | 12.17 kg/m | 3790.41 cm⁴ | 189.52 cm³ | 10.77 – 14.07 m |
| Z 400x90-95x28x3 | 3.00 mm | 14.60 kg/m | 4542.76 cm⁴ | 227.14 cm³ | 11.68 – 15.26 m |
* Statik ve Açıklık Kriteri: Atalet (Ix) ve Mukavemet (Wx) değerleri TS EN 1993-1-3 (Eurocode 3) ince cidarlı çelik normlarına göre kalınlık bazında hesaplanmıştır.
Tavsiye edilen aşık açıklıkları; S350GD+Z çelik kalitesi, L/200 sehim sınırı ve standart aşık yayılı yükü (100–140 kg/m², 1.5 m aşık aksı) referans alınarak verilmiştir. Kesin aşık aralığı ve kesiti, proje bölgesi kar ve rüzgar yükü hesaplarına göre belirlenmelidir.
06 Z-Section Nested Flange & Overlap Geometry
Z-sections engineered with asymmetrical flanges (B1 and B2) enabling seamless nesting and overlap continuity over portal frames:
H: 100mm | B1: 50mm | B2: 55mm. Economical solution for 4.0m to 5.0m roof spans.
H: 150mm | B1: 60mm | B2: 65mm. Industry standard for standard 6.0m warehouse portal bays.
H: 200mm | B1: 60mm | B2: 65mm. Minimizes deflection by up to 35% over 7.5m to 8.0m bays.
H: 250mm | B1: 70mm | B2: 75mm. Engineered for high snow regions and additional rooftop solar loads.
07 Corrosion Resistance & Structural Safety
Class A1 non-combustible galvanized steel producing zero smoke or droplets.
High tensile strength reduces roof secondary framing weight by up to 40% compared to hot-rolled beams.
08 Assembly & Joint Detailing
Cold-formed purlins are bolted to primary rafters using connecting cleats. Z-purlins allow continuous nested laps over supports, reducing structural deflections by up to 35%.
09 Applications & Market Sectors
10 Logistics: Truckload & 40ft Container Stuffing
Delivered in steel-strapped bundles. A standard trailer carries 24,000 kg of structural purlins.
Loaded up to the container maximum payload of 26,000 kg with certified export lashing.
11 Pricing per kg & Project Quotation
Factory-direct indicative kg rates for S350GD+Z galvanized purlins.
12 Compatible Purlin Accessories & Brackets
Galvanized C / Z / Sigma Purlin Span & Deflection Calculator
Specify your purlin span between trusses, purlin spacing and profile section to calculate deflection limits (L/200, L/300), safe capacity, and required steel tonnage per EN 1993-1-3.
Z200 / 2.00 mm (L = 6.00 m)
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Frequently Asked Questions
Common technical inquiries regarding sandwich panels, profiles, pricing, and export supply.
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