Corrugated Metal Fence: How It Goes Together and What It Takes
A corrugated metal fence screws sheets of ribbed galvanized steel to a wood frame of posts and rails, with the ribs running either across the fence or up and down. A 76-ft line, 6 ft tall, with one 4-ft gate and posts 8 ft apart takes 12 posts and 27 rails, plus 27 sheets laid across or 36 stood upright.
Updated
4x4 posts (3.5" actual), 2 ft bury depth.
The calculator above opens on a 76-ft Straight Run beside a driveway, 6 ft tall, with one 4-ft walk gate and posts 8 ft on center. What it gives you is the post side of the job: 8 line posts, 2 end posts and 2 gate posts, each an 8-ft 4×4 with 2 ft in the ground. The steel sheets, the rails, the screws and the concrete are left to you, and each is worked out below from the 9 sections it divides the line into. Wood and wire styles on the same kind of frame are on the fence styles hub.
Ribs across or ribs upright
The rib direction is the main design choice, and it changes the count. Hunker's guide (Ruth de Jauregui, updated July 21, 2022) sets panels either way on a wood frame, screwed to the rails and posts, with the sheets overlapping by one or two ridges. Laid across, the ribs run the length of the fence and each sheet spans from one post to the next, so the fence reads as long horizontal lines in a dark or natural frame. Stood upright, the ribs run from the bottom rail to the top one and the fence looks like a barn wall.
As a metal privacy fence, both layouts close the view completely, since the sheets lap each other and leave no gap head-on.
The sheet: 25¾ in wide, 24 in of cover
Gibraltar Building Products, a manufacturer, answers in its help center that its 8-ft corrugated galvanized steel utility-gauge panel is 25.75 in wide. Lapped one corrugation, as for siding, it covers 24 in; lapped the two corrugations it requires on a roof, it covers 21.5 in. A fence is closer to a wall than a roof, so the one-corrugation lap is the starting point for the 72 ft of fence left once the gate is out.
| Layout | Lap | Sheets per 8-ft bay | Sheets for 72 ft | Cuts | Height or width covered |
|---|---|---|---|---|---|
| Ribs across | 1 corrugation | 3 | 27 | none | 73.75 in of height |
| Ribs across | 2 corrugations | 4 | 36 | trim the top row | 90.25 in of height |
| Ribs upright | 1 corrugation | 36 in a row | 36 | each cut from 96 to 72 in | 865.75 in of width |
| Ribs upright | 2 corrugations | 40 in a row | 40 | each cut from 96 to 72 in | 864.25 in of width |
Laid across with a single lap, three sheets stack to 73.75 in, 1.75 in over the 6-ft line, and the 96-in sheet length matches the 8-ft spacing post center to post center, so no sheet is cut to length; trim the top sheet by 1.75 in or let it stand proud under the cap. Stood upright, every sheet loses 24 in, and the 36 offcuts are only 2 ft long. The upright count comes from the fence length alone; the across count comes from the number of bays, which is where post spacing comes in.
How far apart should corrugated metal fence posts be?
On this line, 8 ft. The calculator offers 6, 8 and 10 ft, and the sheet length decides which of them works.
| Spacing | Sections | Posts | 80-lb bags | Sheets laid across | Sheets upright | Rails at 3 per bay |
|---|---|---|---|---|---|---|
| 6 ft | 12 | 15 | 30 | 36, each cut to 6 ft | 36 | 36 |
| 8 ft | 9 | 12 | 24 | 27, uncut | 36 | 27 |
| 10 ft | 8 | 11 | 22 | 8-ft sheets fall short | 36 | 24 |
At 10 ft an 8-ft sheet laid across no longer reaches from post to post. Longer sheets would, but Hunker's guide puts an extra post at the 5- to 6-ft mark under 10- and 12-ft horizontal panels, which takes the line back to about the post count of 6-ft spacing. At 8 ft each bay also gets the three rails shown in the diagram, top, middle and bottom, for 27 rail pieces of 8 ft.
Each post hole in the calculator's default is 10 in across and 2 ft deep. Take out the 4×4 and 0.92 cu ft of hole is left to fill, which is 2 bags of 80-lb mix per post and 24 bags for the 12 posts; the concrete per fence post calculator does other hole sizes. At 6 ft the calculator keeps 4×4 posts. Set the height to 8 ft and it switches to 6×6 posts 12 ft long, 3 ft deep in 12-in holes, 36 bags for the same 12 posts. The fence post calculator explains the post roles and lengths in full.
Screws at the laps
Fabral, a metal panel manufacturer, gives the wall-panel rules in its November 2016 fastening schedule: every exposed screw gets a combination metal and neoprene washer, on corrugated profiles a screw sits no more than one corrugation from each sidelap, and sidelaps are fastened 18 in on center unless noted. With the ribs upright, the 36 sheets meet in 35 vertical laps, each 72 in tall, and 18-in spacing puts 5 screws on every lap: 175 screws before the rail lines. With the ribs across, each bay has two laps running the 96-in length, 7 screws each, which comes to 126 for the 9 bays.
Rust and the weathered look
A brown, weathered finish on corrugated steel can mean less than it seems. The American Galvanizers Association wrote on September 2, 2026 that "brown staining can occur even when zinc coating remains present and continues to protect the steel," while red rust "typically indicates the galvanized coating has been consumed or is absent at that location." So a brown cast on new galvanized sheets does not by itself mean they are rusting through, and red rust at a scratch or cut edge is the part to watch.
Corrugated metal fence ideas around the frame
The frame is where the sheets pick up a style. Black-stained posts and a cap board with ribs laid across suit a modern house; natural cedar with upright sheets leans rural. A horizontal fence gets the same long lines from wood boards, and the hog wire fence page puts open welded wire in this frame instead of sheet steel, at 4 ft rather than 6.
Corrugated steel has no line in the national cost table, so the fence cost calculator prices the materials it does carry, such as wood privacy and steel ornamental, and fence materials compared sets those side by side. If you are going past 6 ft, read fence height rules and permits before you buy 12-ft posts.
Key Takeaways
- Without the gate, the same 76 ft becomes 10 sections and 11 posts.
- In 60-lb bags, the 12 posts take 36 bags.
- Hunker's guide sizes a post hole at three times the post width, 10.5 in for a 4×4, against the calculator's 10 in.
- Hunker sets 8-ft posts at least 2 ft deep for a 6-ft fence, the same depth the calculator gives.
Frequently Asked Questions
How many sheets for a 100-ft corrugated metal fence?
Stood upright with a one-corrugation lap, 50 sheets. Laid across on posts 8 ft apart, the 100 ft makes 12 full bays and one 4-ft bay: 36 sheets for the full bays and 2 more cut in half for the short one, 38 in all.
Can a corrugated metal fence be 8 ft tall?
On the 76-ft line the calculator moves to 12-ft 6×6 posts set 3 ft deep. Laid across, four sheets per bay stack to 97.75 in, 36 sheets for the 9 bays.
Can I use metal posts instead of wood?
Hunker describes a metal-framed version in which the panels slide into channels and the top channel bolts to the posts. The post count stays the same, though the calculator sizes every post as wood.
How do you build a corrugated metal fence?
Set the 12 posts, fasten three rails across each of the 9 bays, then screw the sheets to the rails and posts, lapping each one over the last by a corrugation. Pick the rib direction before buying, since it sets the sheet count.
Sources
- Gibraltar Building Products, "How wide is the 8 ft. Corrugated Galvanized Steel Utility-Gauge Roof Panel?", help center, no date, accessed November 1, 2026: help.gibraltarbuildingproducts.com/en/knowledge/how-wide-is-the-8-ft.-corrugated-galvanized-steel-utility-gauge-roof-panel
- Hunker, Ruth de Jauregui, "How To Install A Corrugated Metal Privacy Fence", updated July 21, 2022, accessed November 1, 2026: hunker.com/13424995/how-to-install-a-corrugated-metal-privacy-fence
- Fabral, "Fastening Schedules" (Metal Walls), November 2016, accessed November 1, 2026: fabral.com/resource/fastening-schedules
- American Galvanizers Association, "Rust Stains on Galvanized Steel: Transfer or Coating Damage?", September 2, 2026, accessed November 1, 2026: galvanizeit.org/about-aga/news/article/rust-stains-on-galvanized-steel-transfer-or-coating-damage
