Linear Metal Ceiling: Types, Dimensions and How to Specify One
A linear metal ceiling is a suspended ceiling made of long, narrow metal planks that snap onto hidden carriers and leave a visible reveal between each strip. Planks are usually aluminum, 0.5 to 1.0 mm thick (0.020 to 0.040 in), about 50 to 305 mm wide and commonly sold in 3.66 m (12 ft) lengths.
If you’re specifying a linear metal ceiling, that sentence covers the core. The rest of this guide covers what the numbers mean and where projects go wrong.
What a Linear Metal Ceiling Is Made Of
Every linear metal ceiling system has the same five parts, whatever the brand. Planks form the visible surface. Carriers are the inverted channels that hold the planks. Hanger wires or rods tie the carriers to the structure. Perimeter moldings finish the edges. Fillers or splices close the joints.
The planks have formed edges that clip onto the carrier. The VA’s federal specification for linear metal ceilings says the panels snap onto carriers without separate fasteners, and that’s the real appeal of the system. A damaged plank can be unclipped and replaced without touching its neighbours.
The reveal is the gap between planks. It’s open on some products and closed with an integral filler strip on others. Open reveals show the plenum above, so lighting, ducts and the ceiling void need tidy coordination. Closed reveals hide it.
Plank, Tube, Baffle and Grille Profiles
“Linear” covers several different products. In a render they look alike, but a linear metal ceiling made of tubes behaves differently on site from one made of clip-in planks.
| Profile | What it is | Typical use | Acoustic potential |
|---|---|---|---|
| Plank | Flat or shallow formed strip clipped to a carrier | Corridors, retail, offices | Good when perforated and backed |
| Tube | Round or rectangular hollow section, often suspended on a rail | Airports, lobbies, feature ceilings | Low unless backed |
| Baffle | Vertical blade hung on edge | Open-plan offices, public halls | Depends on baffle material |
| Grille | Open cell or blade screen in front of services | Hiding ducts and pipework | Mostly visual |
Rounuq’s metal ceiling systems service page lists aluminum tube ceilings, steel tube ceilings and linear baffle systems as part of its range. If you want the vertical-blade version, our guide to ceiling baffle systems covers it separately, so this article stays on the plank and tube formats that form a continuous plane.
Dimensions: Width, Depth, Length and Thickness
Published figures from Chicago Metallic, American Decorative Ceilings, Armstrong and the VA specification show how tightly the market clusters. The table converts everything to millimetres.
| Source | Plank width | Depth | Length | Thickness and material |
|---|---|---|---|---|
| Chicago Metallic Planar | 4 in (101.6 mm) | 5/8 in (15.9 mm) | 12 ft (3,658 mm) stock | 0.025 in (0.64 mm) aluminum |
| Chicago Metallic PlanarMacro | 4, 6 or 8 in (101.6, 152.4, 203.2 mm) | 7/8 in (22.2 mm) | 12 ft stock | 0.032 in (0.81 mm) aluminum |
| American Decorative Ceilings spec | 4, 6, 8 in at 5/8 in deep; 12 in (304.8 mm) at 1 in deep | 15.9 or 25.4 mm | 12 ft | 0.025, 0.032 or 0.040 in aluminum |
| Armstrong MetalWorks Synchro | 2, 4, 6, 9 in nominal | 1 in (25.4 mm) | 96 in (2,438 mm) | 0.028 in (0.71 mm) electrogalvanized steel |
| VA 09 54 23 federal spec | Not fixed | Not fixed | Not fixed | 0.50, 0.68 or 1.0 mm aluminum, alloy 3005-H26 |
Two things stand out. Aluminum planks mostly sit between 0.64 and 0.81 mm, and the 1.0 mm option is the heavy end. And the 12 ft length repeats across suppliers, which is why most layouts divide into multiples of 3.66 m.
Width is a design choice in any linear metal ceiling. Narrow planks (2 to 4 in) give a fine, rhythmic line. Wide planks (8 to 12 in) read as bold stripes and cover area faster.
Thickness is a stiffness choice. Our metal panel thickness guide explains why gauge changes flatness more than strength, and the same logic applies here: thin planks over long spans can ripple under lighting.
You’ll see mixed units in supplier documents. Convert before you compare. 0.032 in is 0.813 mm, and a 25-gauge carrier at 0.55 mm is thinner than the 0.040 in (1.02 mm) carriers in the Chicago Metallic and American Decorative Ceilings documents.
Aluminum or Steel Planks?
Aluminum is the default for a linear metal ceiling. It’s light, it forms cleanly into snap-on edges, it doesn’t rust if the coating is scratched, and it takes anodizing. The VA specification names alloy 3005-H26 for roll-formed panels.
Steel appears where cost or a specific profile matters. Armstrong’s Synchro plank is 0.028 in electrogalvanized steel with a powder-coated finish. Steel is heavier for the same size and relies on its coating for corrosion resistance, so cut edges need attention near wet areas.
For a Saudi project, ask one question first: will the ceiling ever sit near moisture, salt or an exterior opening? If yes, aluminum with a durable coating is the safer base. For a dry interior corridor, either metal works and price decides.
Stainless steel is a third option for reflective, high-end ceilings, and the metal ceiling design guide compares the three metals in more detail.
Carriers, Hangers and Spacing
Spacing is where the installation quality of a linear metal ceiling is decided. Here’s what the sources require.
| Item | Chicago Metallic | American Decorative Ceilings | VA federal spec |
|---|---|---|---|
| Carrier spacing | 50 in (1,270 mm) o.c. | Along mains, per manufacturer | By manufacturer |
| Carrier material | 0.040 in aluminum, 144 in long | 0.040 in, 3003-H14 aluminum | 0.55 mm galvanized steel minimum |
| Hanger spacing | 48 in (1,219 mm) max | 48 in max, within 6 in of ends | 1,219 mm max |
| Hanger wire | 12 gauge minimum | Not stated | 12 gauge, soft temper |
| Anchors | Not stated | Not stated | Sized for 5 times design load |
Armstrong’s main beam carrier sits at 24 in (610 mm) o.c. for its steel planks, so tighter spacing is common with heavier or wider planks. Always follow the manufacturer’s table for the profile you choose, not a generic number.
Stabilizer bars matter too. Chicago Metallic places them at 24, 36 or 48 in o.c., perpendicular to the carrier, to keep the carriers from rotating and to hold plank alignment.
Long straight runs need expansion carriers, which have slotted tabs that let the metal move. Chicago Metallic lists an expansion carrier with tabs at 4 1/8 in. Skip them on a 40 m corridor and you’ll see planks shift at the joints as the building warms and cools.
A Layout Example With Real Numbers
Say a room is 8.0 m by 6.0 m (48 m²) and planks run along the 8 m side. We assume a 4 in plank with a 114.3 mm module (Armstrong’s 4.5 in module including the reveal) and the Chicago Metallic suspension rules above.
| Quantity | Calculation | Result |
|---|---|---|
| Plank rows across 6.0 m | 6,000 ÷ 114.3 | 52 full rows plus one cut row |
| Plank pieces per row | 8,000 ÷ 3,658 | 3 pieces (2 full, 1 cut) |
| Pieces before offcut reuse | 53 rows × 3 | 159 |
| Carrier lines along 8.0 m | 8,000 ÷ 1,270 | 7 |
| Carrier pieces per line | 6,000 ÷ 3,658 | 2 |
| Total carrier pieces | 7 × 2 | 14 |
| Hanger points per line | 6,000 ÷ 1,219, rounded up, plus 1 | 6 |
| Total hanger points | 7 × 6 | 42 |
The numbers are an estimate for ordering discussion, not a quotation. A real take-off accounts for light fittings, air terminals and the perimeter, and reuses offcuts, so the final plank count is usually below 159.
One point from this arithmetic is easy to miss.
The cut row at the wall is only about 56 mm wide (6,000 minus 52 × 114.3). A sliver that narrow looks wrong. Shift the layout to 51 full rows with two equal cuts of about 86 mm, one at each wall, so both edges look deliberate.
Acoustics and NRC
A solid plank in a linear metal ceiling reflects sound. Absorption comes from perforation plus a backing layer in the plenum.
For a linear metal ceiling, Armstrong lists an NRC of 0.70 for its microperforated planks and no NRC for the unperforated version. The VA specification asks for NRC 0.75 or 0.85, and light reflectance of 0.70 or 0.75. Rockfon’s linear range lists linear products across NRC 0.70, 0.75, 0.80 and 0.95.
NRC comes from the ASTM C423 reverberation room test, and it depends on the exact build: perforation, backer, air space and reveal. A number measured on one assembly doesn’t transfer to yours. Our acoustic metal ceiling article explains how to read NRC properly and what to ask a supplier for.
Open-reveal planks let sound through to absorbers above. Closed reveals can reduce that. If acoustic performance is a requirement, the reveal type belongs in the specification.
Fire, Humidity and Installation Conditions
Armstrong reports Class A fire performance for its linear planks, with a flame spread index of 25 or less and a smoke developed index of 50 or less (ASTM E84). Ask for the test report for your exact finish, because Armstrong notes the rating in its table for the white finish only.
Installation conditions of a linear metal ceiling get less attention than they deserve. The VA specification calls for 16 to 27 °C and no more than 70% relative humidity for 48 hours before, during and after installation. American Decorative Ceilings’ specification gives 60 to 85 °F (15.6 to 29.4 °C) and the same 70% limit.
In practice this means the air-conditioning should be running before the planks go up. In a Riyadh summer, an uncooled building shell can sit well above those temperatures, and thin metal expands visibly as it heats.
Finishes and Corrosion
Finishes for a linear metal ceiling fall into four groups. Powder coating is the most common and gives a wide colour range. Anodizing keeps the metal visible and suits satin silver and bronze looks. Wood-grain laminates and veneers are interior only. PVD gives metallic tones such as gold and bronze.
The VA specification names the standards: AAMA 2605 for high-performance organic coatings and the NAAMM Metal Finishes Manual for anodizing designations such as AA-M32C12A212 for clear satin anodized. The numbers matter when you compare quotes, since “anodized” and “powder coated” each cover a wide range of coating quality.
For ceilings near entrances, canopies or open soffits, finish choice is a durability decision. Our metal soffit guide covers exterior conditions, and the notes on PVD finish explain the metallic option.
Where Linear Planks Work Well
A linear metal ceiling suits corridors, where the direction of the planks pulls the eye along the route. It suits airports, retail frontages, hotel public areas and offices where access to services above is needed. Rounuq’s ceiling service page names airports, hotels, corporate offices, retail, auditoriums and educational facilities among its sectors.
It’s a poor fit where you need a fully sealed plenum, such as spaces with strict air-pressure or cleanroom requirements, unless the system is designed for it. Heavy concealed services also complicate a clip-in ceiling, because each plank release needs clear access.
Common Mistakes That Show Up on Site
- Setting out from the centre of the room only. Check what falls at the walls before approving, or you’ll end up with the narrow cut described above.
- Ignoring lighting and diffusers. Slot diffusers and light lines must align with the reveals, and the drawings should show it.
- Copying one manufacturer’s spacing onto another’s product. Carrier spacing, hanger spacing and stabilizer rules differ.
- Skipping expansion carriers on long runs.
- Leaving out access panels. One American Decorative Ceilings detail uses 24 by 24 in access door kits.
- Specifying NRC for a linear metal ceiling without the assembly. Write the perforation, backer and reveal into the line item.
- Installing before the building is conditioned.
What to Write in the Specification
Put these items on the drawing or in the schedule, with values rather than names.
- Plank width, depth and length, in millimetres.
- Material, alloy and thickness (for example 3005-H26 aluminum, 0.64 mm).
- Perforation pattern and open area, or “solid”.
- Reveal type: open, closed or integral filler.
- Carrier type, spacing and material.
- Hanger spacing and wire gauge.
- Finish standard and colour reference (AAMA 2605 or the anodizing designation).
- Acoustic backer and the required NRC with the test method.
- Fire classification and test standard.
- Access panel locations and size.
- Installation conditions (temperature and humidity).
Have a ceiling drawing ready? Send the reflected ceiling plan, the plank width and finish you’re targeting, and the room dimensions to Rounuq through the contact page. Ask for a confirmed list of profiles and thicknesses before your design is frozen.
Linear Metal Ceilings From Rounuq
Rounuq Almsar is a metal fabricator in Riyadh. Its ceiling range includes aluminum and steel tube ceilings, linear baffles, stainless steel and acoustic systems, finished in powder coat, anodizing or PVD. See the metal ceiling systems page and the Palm View Diriyah metal ceiling project for reference.
Profile availability and thickness ranges aren’t published on the page, so send drawings and a target profile through the contact page and ask for a confirmed list before design is frozen.
Frequently Asked Questions About Linear Metal Ceilings
What is a linear metal ceiling?
It’s a suspended ceiling of long, narrow metal planks clipped onto carriers, with a reveal between each strip. Aluminum is the usual metal.
How thick are linear metal ceiling planks?
Published aluminum planks range from 0.50 to 1.02 mm, with 0.64 and 0.81 mm the most common in the manufacturer documents reviewed here.
What widths are available?
Common nominal widths are 2, 4, 6, 8, 9 and 12 in, or about 51 to 305 mm, depending on the system.
How far apart should the hangers be?
The sources reviewed give a maximum of 1,219 mm (48 in) on centre along carriers. Follow the manufacturer’s table for your profile.
Can a linear metal ceiling be acoustic?
Yes, with perforated planks and a backer. Armstrong reports NRC 0.70 for its microperforated planks. Always request the test assembly.
Aluminum or steel for a linear metal ceiling?
Aluminum for moisture, salt or exterior exposure. Either for dry interiors, with price deciding.
Can I use a linear metal ceiling outdoors?
Only with products rated for it. Armstrong offers exterior use in its unperforated planks. Review the soffit conditions and finish standard.
How do I access services above the ceiling?
Planks unclip individually, and access doors or panels can be added. Plan their positions during design.
Summary
A linear metal ceiling only works when the numbers are chosen early: plank width and thickness, carrier and hanger spacing, reveal type, finish standard and acoustic backing.
Use the table of sources to sanity check supplier offers, set out the layout so wall cuts aren’t slivers, and confirm profile availability with the fabricator before the design is final.
Send Your Ceiling Drawings to Rounuq
Planning a linear metal ceiling for an airport, hotel, office or retail project in Saudi Arabia? Share your drawings and specification with the Rounuq team on the contact page and request a quotation. For other ceiling formats, browse the metal ceiling systems service.