z-channel steel standard sizes

Z-channel steel (also known as Z-purlins or Z-sections) is widely used in construction and structural applications, particularly in roofing, wall cladding systems, and steel framing. The standard sizes can vary depending on the manufacturer and country, but generally, Z-channel steel dimensions are based on:

• Web height (H)

• Flange width (A)

• Lip or return (B)

• Thickness (T)

Here are typical standard Z-channel steel sizes used internationally:

Common Web Heights (H):

• 100 mm (4 in)

• 120 mm (4.75 in)

• 150 mm (6 in)

• 200 mm (8 in)

• 250 mm (10 in)

• 300 mm (12 in)

Typical Flange Widths (A):

• 40 mm (1.5 in)

• 50 mm (2 in)

• 60 mm (2.5 in)

Lip/Return Sizes (B):

• 15 mm to 25 mm (0.6 to 1 in)

 Standard Thickness (T):

• 1.2 mm (18 gauge)

• 1.5 mm (16 gauge)

• 2.0 mm (14 gauge)

• 2.5 mm (12 gauge)

• 3.0 mm (11 gauge)

 Standard Lengths:

• 6 meters (approx. 20 ft)

• 8 meters (approx. 26 ft)

• Can be custom cut depending on project needs

Example Size Labeling:

A Z-section might be labeled as: Z200-50-20-2.0, which means:

• 200 mm web height

• 50 mm flange width

• 20 mm lip/return

• 2.0 mm thickness