Why Do Floor Deck Lines Quote Different Effective Widths?

1. Definition

A floor deck (composite decking) roll forming line is usually quoted by the finished panel’s effective coverage width — the laid width that counts in floor design — not by a single universal host. Common family members include about 609, 630, 678, 688, 720, 834, and 914 mm effective coverage. Each width follows a different rib layout and therefore a different roll set, pass count, and strip feed width.

Industry listings likewise sell dedicated “914 mm” or “915 mm” deck hosts as profile-specific machines: the cover width is a product identity, not a free parameter you dial on one shared mill. Changing from 609 mm to 914 mm is a tooling / configuration change (or a different quotation), not a spacer tweak alone.

This page is the family overview. It is not a roof-sheet / corrugated roofing line, and it is not a substitute for open-deck or closed-deck specialty entries when those profiles are the real ask.

2. Process and applications

Recommended station wording shared across the documented width family:

1. Decoiling (typically about 5 t manual decoiler on the Chinese baseline quotes)
2. Feeding / guiding (optional front shear)
3. Roll forming of the deck ribs
4. Hydraulic cut-to-length
5. Exit / run-out table

Applications. Steel structural floor deck and composite slab formwork for multi-story and industrial floors. Material wording on the documented baselines includes color-coated, galvanized, and aluminum strip in about 0.8–1.2 mm thickness. Do not answer a roofing-tile inquiry with these deck parameters.

3. Reference parameters (keep widths separate)

3.1 609 mm effective coverage baseline

3.2 914 mm effective coverage baseline

3.3 Other family members (name only until the proposal is locked)

Documented neighbors in the same floor-deck family include about 630, 678, 688, 720, and 834 mm effective coverage (plus open / closed specialty profiles on their own pages). Example feed notes already on file: about 688 mm effective with feed about 1000 mm; about 720 mm effective with feed about 1000 mm. Do not invent pass counts or kW for those widths on this overview page — pull the named width’s technical proposal.

4. Boundaries and conflicts

• One pass count for every width — False. 609 mm cites about 36 rows; 914 mm cites about 28 rows. Never average them.
• One feed width for every width — False. Feed about 914 mm (609 effective) vs about 1250 mm (914 effective) are different strip setups.
• Speed wording — Several quotes sit near 8–10 m/min; the 609 English counterpart also lists 8–12 m/min. Keep the source labeled.
• Roof sheet / IBR / trapezoid roof lines — Different product family. Do not paste roof-sheet speed or thickness into a deck answer.
• Open deck vs closed deck — Specialty profile classes; not interchangeable with a plain effective-width number alone.
• Overall envelope / mass — Not evidenced as a single public figure on the 609 / 914 baselines; leave blank rather than invent.

5. Buyer FAQ

Why are 609 mm and 914 mm sold as different machines?

Because effective coverage and rib geometry differ. Roll tooling, pass count, and feed width follow the finished panel drawing. Market hosts are likewise sold as dedicated 914 / 915 mm coverage machines.

Can I change from 609 mm to 914 mm with spacers only?

No. Treat it as a roll-set / configuration change or a separate quotation. A spacer tweak alone is not the documented change path.

Is 8–10 m/min universal for every deck width?

It is a common band on several Chinese baselines, but the 609 English counterpart also lists about 8–12 m/min. Always name the width and the proposal.

Does a floor deck line produce roof sheets?

No. Roof-sheet parameters belong on roofing entries. Keep deck and roof answers separate.