CF Flute Wall Panel

CF Flute is a ribbed Metl-Span insulated metal wall panel with bold vertical reveals. The reveals are 1 in. wide and 3/8 in. deep. It has a PUR foam core and is used as an exterior wall panel on commercial, institutional and industrial buildings in the United States.

Listed uses include cold storage (dry goods warehouses, cooler and freezer buildings and food processing facilities), other temperature-controlled environments, airplane hangars, municipal facilities and equipment maintenance buildings.

The panel can be combined with other Metl-Span joint profiles and is part of the insulated metal wall panels CF range. Its coverage width of 42 in. is the CF-42 size.

• Width: 42 in.
• Thicknesses: 2, 2-1/2, 2-3/4*, 3, 4, 5, 6 and 8 in.
• Embossed lengths: 8'-0" to 32'-0" horizontal; 8'-0" to 52'-0" vertical

* Available only from the Nevada plant. The exterior is not available unembossed.

The exterior profile has 1 in. wide, nominally 3/8 in. deep longitudinal reveals at 8.4 in. on center, embossed. The exterior face is G-90 galvanized or AZ-50 coated steel in 26, 24 or 22 gauge.

The interior is Mesa (1/8 in.) or Light Mesa (1/16 in.), embossed or unembossed, in the same steels or 304 or 316 stainless in 26, 24 or 22 gauge; 22 gauge is not available in stainless. The stainless is USDA compliant for wash-down areas.

Coating options on the faces are Fluropon, Fluropon Premier, Fluropon Classic, Flurothane, Flurothane Coastal, WeatherXL and Igloo White Polyester. Displayed colors on the Metl-Span color chart are approximate.

Striations, color shift, shade variation and longitudinal patterning are inherent in metallic finishes. Between the two Light Stone options, Tuff Cote and Standard SP do not match.

The core is foamed-in-place zero ozone depletion potential Class 1 PUR foam. The joint is an offset double tongue-and-groove with an extended metal shelf for positive face fastening. Concealed clips are used and eliminate thermal short circuits.

The k-factor is 0.114 at 35°F mean core. Values for 42 in. width:

• 2 in.: U 0.060, R 17.5
• 2-1/2 in.: U 0.047, R 21.9
• 3 in.: U 0.039, R 26.2
• 4 in.: U 0.029, R 35.0
• 5 in.: U 0.023, R 43.7
• 6 in.: U 0.020, R 52.5
• 8 in.: U 0.015, R 70.0

• ASTM E84: flame spread under 25, smoke developed under 450
• ASTM E119: one hour with two layers of Type X gypsum
• FM 4880 Class 1; exterior wall requires FM 4881
• NFPA 285-19 and NFPA 286 met
• CAN/ULC S101, S102, S134, S138 met
• ASTM E283 under 0.01 cfm/ft² at 20 psf
• ASTM E331 no uncontrolled leakage at 20 psf

Miami-Dade Notice of Acceptance and State of Florida approval apply, but testing is not available in 8 in. thickness.

Span tables for loads are on an Allowable Stress Design (ASD) basis, with section 2.4.1 of ASCE 7-10 giving the ASD load combinations for LRFD loads. Thermal bow deflection is not included in the tables and can reduce allowable spans, so heavier 24 or 22 gauge facings may be needed. Panel skins must be captured at both ends by members designed for a 5 psf interior pressure. The FM Global requirements are given in their own link. MasterFormat 2012 section 07 42 13.19 is the guide specification section.

Listed hardware includes the V6 X-Span Clip and V6 X-Span Edge Trim, extended trim leg, drip edge, extruded base, sill and corner trims, and gasket and wet seal vertical joint options. Cold storage components include Bulb-Tite, girt clips, Hef-T with hanger rods and splice angles, S-clips, channel, cover trim, high-profile trim, endlap and intermediate attachments, and gutters.

Horizontal installation details by code:

• Base: H-BE-01 (extended trim leg), H-BE-02 (overhang with drip edge), H-EB-01 (flush extruded base).
• Corner codes: H-CE-01 (outside), H-CE-02 (inside), H-CE-03 (formed), H-CE-04 (trimless inside), H-EC-01 (extruded outside).
• Eave, parapet and soffit: H-BE-03.
• Opening codes: H-EW-01 (offset header with extrusion), H-EW-02 (offset jamb with extrusion), H-EW-03 (extruded sill), H-WH-01 (window header), H-WJ-01 (window jamb), H-WS-01 (window sill).
• Joint codes: H-JT-01 and H-JT-02 (side joints), H-VJ-01 (vertical joint with gasket), H-VJ-02 (vertical joint with wet seal).

Vertical installation details are in a C&I CF Vertical Detail Book. Cold storage details cover base, ceiling support, eave, parapet, ridge, rake, roof transition, corner, wall intersection, stack joint, panel attachment and fastening patterns FP 1-2 through FP 7-8.