Epic Steel’s 7/8” corrugated panels deliver 34 inches of roof coverage and 37 inches of wall coverage from a 40-inch panel width. The 24-gauge profile weighs 4.0 pounds per linear foot with a minimum 50,000 psi yield strength — Grade D steel that can span open framing up to 5 feet. For Montana contractors dealing with heavy snow loads and limited construction windows, these panels offer genuine structural advantages over standard corrugated options.
Structural Performance and Coverage
The 7/8” profile offers approximately 60% more roofing coverage per panel compared to 1/2” corrugated profiles. That math matters on commercial buildings where every additional panel costs labor and time. With 34 inches of effective roof coverage per 40-inch panel, crews handle fewer pieces and make fewer trips up the ladder.
| Specification | Value | Source |
|---|---|---|
| Panel Width (Overall) | 40 inches | Manufacturer |
| Roof Coverage | 34 inches | Manufacturer |
| Wall Coverage | 37 inches | Manufacturer |
| Rib Height | 7/8 inch | Manufacturer |
| Rib Spacing | 2.67 inches (2 2/3”) | Manufacturer |
| Gauge | 24 Gauge | Manufacturer |
| Weight | 4.0 lbs/LF | Manufacturer |
| Yield Strength | Minimum 50,000 psi (Grade D) | Manufacturer |
| Length Range | 42 inches to 42 feet | Manufacturer |
24 gauge is heavier and more durable than the typical 26 or 29 gauge panels used in residential retail, offering better hail resistance and longevity. For agricultural buildings and commercial projects where structural integrity trumps initial cost, the extra weight pays dividends.
Weather Protection Engineering
The integrated anti-siphon groove and double overlap system for roofing applications address Montana’s specific moisture challenges. Single overlap works for vertical wall applications, but roofing demands that double protection.
The panels carry UL 580 Class 90 wind uplift certification, UL 2218 Class 4 hail impact rating, and UL 790 Class A fire rating. Class 4 hail impact means these panels can take a 2-inch ice ball at terminal velocity without failure. Class 90 wind uplift handles sustained winds that would peel lesser panels right off the deck.
| Certification | Rating | Performance |
|---|---|---|
| Wind Uplift | UL 580 Class 90 | Tested |
| Hail Impact | UL 2218 Class 4 | Tested |
| Fire Rating | UL 790 Class A | Tested |
Installation Specifications
Minimum roof slope is 3/12. For wood substrates, use #10 wood-grip fasteners on dimensional lumber or #14 wood-grip on plywood/OSB (minimum 7/16”). For structural steel up to 3/16”, use #12 Tek screws.
Roofing applications require fasteners at the top of corrugation, every third ridge, attached to each purlin. Wall siding places fasteners in the valleys — the flat portion of the corrugation. Wall applications use 1-rib overlap while roofing requires 2-rib overlap for maximum water protection.
The panels are suitable for heavy snow load areas when paired with appropriate purlin spacing per load tables. Customer reviews specifically mention suitability for remote locations and difficult mountain terrain, with praise for fast fabrication times in Missoula and on-site fabrication for larger projects to minimize waste.
The 35-year warranty on Ultra-Clad (Kynar 500 / Hylar 5000) painted finishes covers the matte black option. Non-painted materials like Cor-Ten and copper come without warranty coverage. The structural steel itself meets ASTM A525 / A606 / A653 / A792 / A925 standards.
The Bottom Line
Epic Steel’s 7/8” corrugated delivers measurable advantages for commercial and agricultural projects requiring superior spanning capability. The combination of 34-inch roof coverage, 50,000 psi yield strength, and proven certifications makes this a genuine upgrade from commodity corrugated panels. At 4.0 pounds per linear foot, it’s not pretending to be a budget option — it’s engineered for projects where structural performance and weather resistance justify the investment.
Frequently Asked Questions
What’s the actual spanning capability of these 24-gauge panels? The Grade D steel with minimum 50,000 psi yield strength can span open framing up to 5 feet. Always verify specific load tables for your snow load conditions and purlin spacing.
How much more coverage do I get compared to standard corrugated? The 7/8” profile offers approximately 60% more roofing coverage per panel compared to 1/2” corrugated profiles. Each panel provides 34 inches of roof coverage from a 40-inch panel width.
What trim and accessories work with this profile? The panels are compatible with standard 7/8” corrugated trim profiles and custom transitions. Available accessories include gable trim, ridge caps, sidewall flashing, snow stops, wainscot, angle base, J-metal, outside corners, and transition pieces.
Can these panels handle Montana’s hail storms? Yes — they carry UL 2218 Class 4 hail impact certification, the highest rating available. This means they’ve been tested with 2-inch diameter ice balls without failure.
What’s the minimum roof pitch for installation? Minimum slope is 3/12 for roofing applications. Steeper pitches improve water shedding but aren’t required for the warranty.
Ready to Get Started?
Our roofing specialists can help you find the right Epic Steel products for your project.
More from Epic Steel
Explore All Epic Steel Products
We carry Epic Steel across all 11 Montana and Idaho stores.
