914 Open Floor Deck Roll Forming Machine

1. Definition

An open floor deck roll forming machine continuously forms a ribbed steel sheet from coil, with the ribs left open on the underside. The finished sheet is laid across the floor beams and concrete is poured on it: the deck acts as the permanent formwork for the slab and stays in the floor as decking reinforcement. On inquiries it also appears as metal deck machine, composite deck machine and floor deck roll forming line - they point at the same host class.

The example on this page is the 914 cover width build. About 1250 mm of coil feeds the line and about 914 mm of effective cover comes out; the difference is consumed by the ribs. The profile is formed on about 28 driven stands on a Ø90 mm shaft with chain drive, from strip of 0.8-1.2 mm in colour-coated steel, galvanized steel or aluminium, and the finished sheets are cut on a hydraulic cut-to-length shear at a working speed of about 8-10 m/min.

2. What this is not

• Not a closed deck machine. Closed deck has its own roll flower and more stands, and is quoted as its own build. Changing from open to closed deck is not a setting on the deck line.

• Not a roof sheet machine. Roof sheet is a covering profile. A deck sheet carries a concrete slab; a roof sheet sheds weather. Different products, different roll flowers.

• Not a dual-layer deck machine. A machine that forms two deck profiles on one frame is a different host class with its own stand pairing and its own electrics, and it is quoted on its own.

• Not the other cover widths of the same commercial family. A different cover width follows a different roll set. Confirm it against your own section drawing instead of pasting numbers from a neighbouring width.

• Not a cut-to-length line or a slitting line. Those prepare blanks and coil; they do not form the deck section.

• Not a purlin, stud or keel machine, and not a fence or guardrail line, even where the strip thickness looks similar. Those form different sections on different shafts and stand counts.

3. How it is formed

The strip is decoiled at the head of the line, guided square into the first stand, and then run through about 28 driven stands. Each stand adds one small part of the bend, so the rib section builds up gradually out of a flat strip rather than being folded in a single hit - that gradual build-up is what keeps the coating intact and the ribs straight along the length. After forming, a hydraulic shear cuts the sheet to the ordered length and the sheet runs out onto the outfeed support. Where a hydraulic front shear is ordered, the strip ends are squared ahead of the forming section; it is not fitted on the standard build.

• Decoiling

• Infeed and guiding

• Front shear (optional, not on the standard build)

• Forming - about 28 stands on a Ø90 mm shaft

• Hydraulic cut-to-length

• Outfeed

4. Published numbers on this mill (open deck, 914 cover width - not a blended family range)

The figures below are the ones on file for this build. They are not averaged across other cover widths, and they are not taken from the dual-layer deck example that sits on a separate page. Where a dimension depends on the customer's section, it is left to the signed drawing instead of being published as a universal value.

Rib depth, rib pitch, flange and lap detail and cut lengths are frozen on the signed customer drawing. Load design of the slab, and any project engineering certification, are settled by the project's own specification and testing rather than published here.

5. FAQ

Is open deck the same machine as closed deck?
No. Closed deck has a different roll flower and more stands and is quoted as its own build. Open and closed are two deck types, not two settings.

What is the difference between cover width and coil width?
On this build about 1250 mm of coil goes in and about 914 mm of effective cover comes out. The difference is the material taken up by the ribs, so cover width is always narrower than the coil.

Can the line run another cover width?
Cover width follows the roll set. Another width is quoted against your own section drawing; it is not a control-panel setting on this line.

Does it punch the deck?
This build has no in-line punching station. The in-line cut is a hydraulic cut-to-length shear. If your section needs holes, raise it on the inquiry.

Is it the same as a roof sheet machine?
No. A roof sheet is a covering profile with its own roll flower and its own line. A deck sheet is permanent formwork for concrete and stays in the slab.

What strip can it run?
0.8-1.2 mm, in colour-coated steel, galvanized steel or aluminium. Confirm the grade with your inquiry.

What speed does it run at?
About 8-10 m/min in normal working. Plan your output from the sheet length you sell rather than from the working speed on its own.