Nucor R-Panel roof profile — 2022 drawing

Nucor Building Systems markets R-Panel as a through-fastened metal roof sheet with 36 inches of installed coverage and three 12-inch major-rib modules. This record anchors the shape to Nucor Buildings Group fabricated-parts drawing RP___-_, issued October 14, 2022, and to its current February 2026 roof specification. The name R-Panel describes a broad industry family, but the formed right edge, shallow pan beads and dimensional witness lines on this Nucor drawing make it a specific manufacturer's section. A sheet quoted against an existing Nucor roof should carry the Nucor drawing identity rather than only a generic 36-inch width and nominal rib height.

The slate-gray roof photograph above comes from a Nucor project that names R-Panel as its roof system. Its repeated lines make the installed major-rib rhythm visible across a whole building; the image does not reveal the hidden overlap edge. The one-page ordering sheet in the file section places a non-scale identification sketch and verified dimensions beside the quote inputs, with a direct link to the complete manufacturer cross-section. Compare that drawing with a clean, full-width end of the existing panel, noting which edge is over and which lies under the adjoining sheet. A photo of the roof face, a drawing and an intact sample answer different identification questions and should travel together with the inquiry.

The 2022 drawing prints 36.0000 inches across the installed cover and 12.0000 inches between major rib centers. Each main trapezoidal rib is marked 1.2720 inches high, 1.0095 inches across the top and 3.2813 inches across the base, with a 47.43-degree web angle. Nucor's drawing marks the height, crest and base as out-to-out dimensions of formed material. The current product sheet rounds the major rise to a nominal one-and-one-quarter inches, which is appropriate for catalog identification but less precise than the fabrication drawing. A quote for a neighboring sheet should use the dated drawing values and retain their measurement conventions.

Low beads break up the wide pans between the major ribs. The manufacturer drawing labels a 29.53-degree bead web, 0.1830-inch bead rise and 1.3353-inch bead width, and it places pairs of beads around a 2.0950-inch central measurement. One small flat is marked 0.7865 inch. These low features matter for visual continuity and for the local shape of closures and overlaps, even though their rise is far smaller than the main rib. Record whether the field panel still has intact beads: a previously flattened, recoated or damaged sample can give a false impression of the original shape. The full Nucor drawing preserves the lines that locate each numeric callout.

At the right end of the Nucor section, the drawing labels a 0.7934-inch top-edge reach and a 0.4426-inch return on the descending lip. The opposite end terminates differently. That asymmetry is the physical reason two nominal R-panels can share a 36-inch cover yet fail to nest as a replacement pair. The 47.43-degree main webs, right return and pan bead locations should be compared on a formed cut-off from the proposed metal run. Ask the shop to photograph both sides of that trial piece beside an undamaged original sheet before approving the full quantity.

Nucor's fabricated-parts table gives a 42.75-inch steel blank width for the listed R-Panel part series. That number describes its steel feedstock before forming; it is not the 36-inch coverage on the roof and is not a fiberglass laminate specification. The manual lists 22-, 24- and 26-gauge roof-capable part marks, while the February 2026 roof specification presents standard 26- and 24-gauge performance tables. Identify the actual installed gauge and finish from the building record or a measured sample. The 2025 Miami-Dade roof drawing is specifically for a 24-gauge accepted steel assembly, so its geometry can identify the section without turning every material option into the same tested assembly.

Nucor's current roof product sheet identifies Galvalume, SP and PVDF finish options and describes the R-Panel roof over fiberglass batt or rigid-board insulation. The geometry record does not select a coating, color, sheet length, purlin spacing or fastener pattern for a particular building. The Miami-Dade drawing shows a one-half-in-twelve minimum roof slope for its documented assembly, while its load tables and support details apply to the tested 24-gauge configuration shown there. A replacement request should distinguish the measured panel shape from the existing roof's structural and weather details. Record the roof slope, support spacing, insulation condition, panel span and the location of any end lap or trim before asking for a final panel schedule.

For one-panel repair, mark the direction in which sheets were installed and identify the exposed side-lap edge at the repair bay. Measure the replacement length on the building from the intended eave condition to its ridge, high-eave or end-lap termination. Send a color sample or finish reference if a visual match matters. The steel drawing tells a fabricator how Nucor depicts the cross-section, but a fabricator still needs the roof's actual layout and an intact edge sample to confirm that its forming die makes the same lap. Keep a trial section and the accepted drawing revision with the project's maintenance record.

Nucor explicitly lists a translucent roof panel in its R-Panel profile. Its translucent technical sheet names Glasteel Acrylit GC, a fiberglass-reinforced acrylic panel, and the Nucor translucent-parts manual names R-Panel roof units in that family. The H9320 unit is listed for wall or roof use, while H9325 is identified as a roof-only unit. These are far stronger starting points for a GRP inquiry than asking a generic sheet maker to guess a mold from an R-panel silhouette. Send Nucor the existing building's panel identity, the 2022 steel cross-section and a sound steel sample, and ask which current translucent part and roof detail are intended for the actual opening.

The Nucor roof-systems page describes both insulated and non-insulated translucent R-Panel options. Its fiberglass technical sheet states material properties and tolerances for the separate translucent unit, and the part manual distinguishes allowable roof use and secondary-spacing conditions by part mark. Specify the desired daylight opening, panel count, length, insulation condition, support spacing and whether an existing translucent panel is being replaced or daylighting is being added. Request Nucor's project-specific lap, support and end-detail information for the selected fiberglass unit. The steel drawing supplies the neighboring metal shape, while the fiberglass sheets in the file section supply the GRP product identity and material information.

For a fiberglass match, request a profile review from Nucor translucent R-Panel roof units.

Start a steel inquiry with the single-page Nucor profile sheet, the complete 2022 fabricated-parts drawing, a photo of the installed roof and an undamaged full-width end sample. State the exact metal gauge, finish, color, required sheet length, quantity and delivery ZIP code. Mark the top and underside of the sample, its installation direction and which edge will overlap the next sheet. If roof records identify a Nucor job or part mark, attach that information. Nucor's Terrell, Texas, division is the direct route for its named R-Panel roof product and can also identify its own translucent R-Panel option.

For another metal shop, ask for its proposed profile drawing and a short physical trial. Compare the 36-inch installed cover, 12-inch pitch, 1.2720-inch formed rise, 47.43-degree webs, pan beads and right-hand return with the Nucor drawing. A standard shop R-panel may be suitable for an entire new roof area but has not thereby demonstrated that one sheet can nest into an existing Nucor run. Keep the manufacturer PDF with the quote so the shop sees the full witness lines and material conventions; the compact ordering sheet helps communicate the key values and leaves room for the actual project quantities and length.

The first Texas contact for an exact Nucor steel sheet is Nucor Building Systems at its Terrell plant. Four other businesses cover distinct Texas service areas for a measured metal-profile inquiry. Xtreme Metals forms roofing panels in East Texas; Quality Metals lists metal-panel production in San Antonio; Lucid Metal Works lists R-panel roofing work in Houston; and All Precision Metals roll-forms R-panel to ordered lengths in El Paso. Each can receive the same drawing and sample package and answer whether its equipment can form the Nucor section or whether it would propose another panel for a defined roof area. Their published standard-panel ranges do not establish possession of Nucor's exact lap tooling.

Ask each supplier to respond with the proposed die or fabrication method, a section sketch, material and finish availability, maximum practical length, minimum quantity and a trial-piece plan. For an isolated replacement, the side-lap answer matters as much as the 36-inch width. A quote that states only a generic R-panel name and unit price leaves the critical edge comparison unresolved. If the shop proposes a different panel, ask it to identify where a transition would be made rather than describing it as a direct match. Keep the fiberglass order separate: Nucor's translucent R-Panel part marks and technical sheet identify a distinct product and inquiry route.

• Northeast Texas — Terrell: Nucor Building Systems — original R-Panel manufacturer with a Terrell plant; request the named steel or translucent R-Panel unit
• East Texas — Flint/Tyler: Xtreme Metals — in-house metal roof-panel forming; send Nucor's drawing for a tooling and lap feasibility quote
• South-Central Texas — San Antonio: Quality Metals — regional metal-panel forming and job-site rolling; ask for exact sample comparison
• Gulf Coast — Houston: Lucid Metal Works — Houston roof-panel metal shop listing R-panel; confirm its die against the Nucor edges
• West Texas — El Paso: All Precision Metals — cut-to-length R-panel production; request cross-section and side-lap comparison

An R-Panel repair becomes easier to specify when the building file preserves the manufacturer, drawing generation and sample as one set. Record the panel's position on the roof plan, the run length, neighboring sheet condition and the direction of the overlap. Photograph a cleaned panel end so the small beads and right return can be seen clearly. The built-up metal roof installation service can coordinate that profile identification with insulation, support and installation planning on a Texas commercial building. A deliberate record also helps a later maintenance team distinguish this Nucor R-Panel roof from another maker's visually similar 36-inch section.

The file section below holds Nucor's current steel roof specification, its exact 2022 dimensional drawing, the 2025 translucent fiberglass technical sheet and translucent part manual, the roof approval drawing, and the one-page quote record. Use the steel drawing for measured shape, the current sheet for the marketed roof product, and the separate translucent documents for a GRP option. The dated approval records a particular tested steel assembly. Keep the supplier's returned section and sample with these files once an order is placed, so future replacements refer to the material and lap that were actually supplied rather than the broad R-Panel name alone.