From Coil to Sheet: How Galvanized Sheets Are Cut, Levelled & Packed
How master galvanized coils are slit, cut-to-length and tension-levelled into the flat, fabricator-ready GI sheets used across the GCC.
Galvanized Sheets start life as full GI master coils. The cut-to-length (CTL) process converts those coils into flat, dimensionally accurate sheets ready for shearing, punching and forming — without disturbing the zinc coating that protects them.
1. Decoiling the Master GI Coil
The galvanized master coil is loaded onto a hydraulic mandrel decoiler. A peeler arm separates the lead end, and pinch rolls feed the strip into the line at controlled tension to avoid coating damage.
2. Tension Levelling
The strip passes through a tension leveller — a series of small-diameter rolls that elongate the strip past its yield point in a controlled way. This relieves residual stresses and produces sheets that stay flat after cutting, even at thin gauges where coil set and edge wave are otherwise visible.
3. Edge Trimming & Optional Slitting
If a narrower width is required, rotary slitter knives trim the edges and divide the strip into mults. Trim scrap is recovered separately for recycling.
4. Flying or Stop-Start Shear
A precision shear cuts the moving strip to length on the fly. Length tolerance is typically ±2 mm on standard lengths up to 6 m. Sheets drop onto a stacking table where automatic alignment squares the pile.
5. Packing for GCC Transit
Stacked sheets are protected with VCI paper and edge protectors, banded with steel straps onto hardwood skids, and wrapped to resist humidity during transit — particularly important across coastal UAE and KSA distribution.
Galvanized Sheets (GI Sheets)
Cut-to-length galvanized sheets for precision fabrication.
