The common specifications for 75 vertical keels are a width of 75mm, a height of 35-50mm, a thickness of 0.4-0.6mm, and a length of usually 3 meters or customized sizes, in accordance with the national standard GB/T 11981-2024.
Standard specification parameters
Section size:
The mainstream models are 75 × 35mm or 75 × 50mm (width × height). ‌‌
The thickness range is 0.4-0.6mm, and some brands such as Longpai offer options of 0.5mm and 0.6mm. ‌‌
Length:
The standard length is 3 meters, and some manufacturers offer customized sizes such as 3.2m, 3.5m, 4m, etc. ‌‌
Material and Craftsmanship
Using cold-rolled continuous hot-dip galvanized coils, with double-sided galvanizing amount ≥ 120g/㎡, and rust prevention performance better than the requirements of national standard superior products. ‌‌
The cross-sectional shape is mostly C-shaped, suitable for non load bearing partition wall systems. ‌‌