07 42 13 - Metal Wall Panels.pdf

SECTION 07 42 13

METAL WALL PANELS

PART 1 GENERAL

1.01 SECTION INCLUDES

A. Manufactured metal panels for exterior wall panels and subgirt framing assembly, with related flashings and accessory components.

1.02 REFERENCE STANDARDS

A. AAMA 2605 - Voluntary Specification, Performance Requirements and Test

Procedures for Superior Performing Organic Coatings on Aluminum

Extrusions and Panels (with Coil Coating Appendix); 2022.

B. ASTM A792/A792M - Standard Specification for Steel Sheet, 55%

Aluminum-Zinc Alloy-Coated by the Hot-Dip Process; 2025a.

C. NFPA 285 - Standard Fire Test Method for Evaluation of Fire

Propagation Characteristics of Exterior Wall Assemblies Containing

Combustible Components; 2025.

1.03 SUBMITTALS

A. Product Data - Wall System: Manufacturer’s data sheets on each product to be used, including:

1. Physical characteristics of components shown on shop drawings.

2. Storage and handling requirements and recommendations.

3. Installation instructions and recommendations.

B. Shop Drawings: Indicate dimensions, layout, joints, construction details, support clips, and methods of anchorage.

C. Samples: Submit two samples of wall panel and soffit panel, 12 inches by 12 inches in size illustrating finish color, sheen, and texture.

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Metal Wall Panels Section 07 42 13

D. Test Reports: Submit test report verifying compliance with NFPA 285 for previously-tested exterior wall assembly.

E. Manufacturer's qualification statement.

F. Installer's qualification statement.

1.04 QUALITY ASSURANCE

A. Manufacturer Qualifications: Company specializing in manufacturing products specified in this section with minimum three years of documented experience.

B. Installer Qualifications: Company specializing in installing products specified in this section with minimum three years of documented experience.

C. Testing Agency Qualifications: Independent firm specializing in performing testing and inspections of the type specified in this section.

1.05 DELIVERY, STORAGE, AND HANDLING

A. Protect panels from accelerated weathering by removing or venting sheet plastic shipping wrap.

B. Store prefinished material off the ground and protected from weather;

prevent twisting, bending, or abrasion; provide ventilation; slope metal sheets to ensure proper drainage.

C. Prevent contact with materials that may cause discoloration or staining of products.

1.06 FIELD CONDITIONS

A. Do not install wall panels when air temperature or relative humidity are outside manufacturer's limits.

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Metal Wall Panels

1.07 WARRANTY

A. See Section 01 78 00 - Closeout Submittals for additional warranty requirements.

B. Finish Warranty: Provide 15-year manufacturer warranty against excessive degradation of exterior finish. Include provision for replacement of units with excessive fading, chalking, or flaking.

Complete forms in Owner's name and register with warrantor.

PART 2 PRODUCTS

2.01 MANUFACTURERS

A. Metal Wall Panels - Concealed Fasteners:

1. MBCI; FW-120 Panel: www.mbci.com.

2.02 METAL WALL PANEL SYSTEM

A. Wall Panel System: Factory fabricated prefinished metal panel system, site assembled.

1. Provide exterior wall panels and subgirt framing assembly.

2. Design and size components to support assembly dead loads, and to withstand live loads caused by positive and negative wind pressure acting normal to plane of wall.

3. Fire Performance: Tested in accordance with, and complying with acceptance criteria of NFPA 285.

4. Maximum Allowable Deflection of Panel: L/180 for length(L) of span.

5. Movement: Accommodate movement within system without damage to components or deterioration of seals, movement between system and perimeter components when subject to seasonal temperature cycling;

dynamic loading and release of loads; and deflection of structural support framing.

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Metal Wall Panels

6. Drainage: Provide positive drainage to exterior for moisture entering or condensation occurring within panel system.

7. Fabrication: Formed true to shape, accurate in size, square, and free from distortion or defects; pieces of longest practical lengths.

8. Corners: Factory-fabricated in one continuous piece with minimum

2-inch returns.

B. Exterior Wall Panels:

1. Profile: Vertical; style as indicated.

2. Side Seams: Double-interlocked, tight-fitting, sealed with continuous gaskets.

3. Material: Precoated steel sheet, 24 gauge, 0.0276 inch minimum thickness.

4. Panel Width: 12 inches.

5. Color: As selected by Owner from manufacturer's standard line..

C. Subgirt Framing Assembly:

1. 16-gauge, 0.0598 inch thick formed non-precoated steel sheet.

2. Profile as indicated; to attach panel system to building.

D. Internal and External Corners: Same material, thickness, and finish as exterior sheets; profile to suit system; brake formed to required angles.

E. Trim: Same material, thickness and finish as exterior sheets; brake formed to required profiles.

F. Anchors: Galvanized steel.

2.03 MATERIALS

A. Precoated Steel Sheet: Aluminum-zinc alloy-coated steel sheet, ASTM

A792/A792M, Commercial Steel (CS)) or Forming Steel (FS), with

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Metal Wall Panels

AZ50/AZM150 coating; continuous-coil-coated on exposed surfaces with specified finish coating and on panel back with specified panel back coating.

2.04 FINISHES

A. Exposed Surface Finish: Panel manufacturer's standard polyvinylidene fluoride (PVDF) coating, topcoat over epoxy primer.

B. Panel Backside Finish: Panel manufacturer's standard siliconized polyester wash coat.

C. Fluoropolymer Coil Coating System: Polyvinylidene fluoride (PVDF) multi-coat superior performing organic coatings system complying with

AAMA 2605, including at least 70 percent PVDF resin, and at least 80 percent of coil coated metal surfaces having minimum total dry film thickness (DFT) of 0.9 mil, 0.0009 inch; color and gloss as selected by Owner from manufacturer's standard line.

2.05 ACCESSORIES

A. Support for Cladding and Continuous Insulation: Continuous thermal Z-girts.

1. Fiberglass reinforced plastic (FRP) girts that provide cladding attachment support for metal wall panels.

2. Depth: As indicated on drawings.

3. Spacing: 24 inches on center, vertically.

4. Fasteners: As recommended by clip manufacturer.

B. Gaskets: Manufacturer’s standard type suitable for use with system, permanently resilient; ultraviolet and ozone resistant.

C. Concealed Sealants: Non-curing butyl sealant or tape sealant, see

Section 07 92 00

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Metal Wall Panels

D. Exposed Sealant: Elastomeric; silicone, polyurethane, or silyl-terminated polyether/polyurethane.

E. Fasteners: Manufacturer’s standard type to suit application; with soft neoprene washers, steel, hot dip galvanized.

1. Metal-to-Metal Fasteners: Self-drilling, self-tapping screws.

F. Field Touch-up Paint: As recommended by panel manufacturer.

PART 3 EXECUTION

3.01 EXAMINATION

A. Verify that building framing members are ready to receive panels.

3.02 PREPARATION

A. Install subgirts perpendicular to panel length, securely fastened to substrates and shimmed and leveled to uniform plane, and spaced at intervals indicated.

B. Protect surrounding areas and adjacent surfaces from damage during execution of this work.

3.03 INSTALLATION

A. Support for Cladding and Continuous Insulation: Install in accordance with approved shop drawings and manufacturer's written instructions;

securely fasten; shim and level to uniform plane.

1. Spacing: Maximum 24 inches on center.

B. Install panels on walls in accordance with manufacturer's instructions.

C. Protect surfaces in contact with dissimilar metals with bituminous paint; allow to dry prior to wall panel installation.

D. Fasten panels to structural supports; aligned, level, and plumb.

E. Use concealed fasteners unless otherwise indicated by Architect.

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F. Seal and place gaskets to prevent weather penetration. Maintain neat appearance.

3.04 TOLERANCES

A. Offset From True Alignment Between Adjacent Members Abutting or In

Line: 1/16 inch, maximum.

B. Variation from Plane or Location As Indicated on Drawings: 1/4 inch, maximum.

3.05 CLEANING

A. Remove site cuttings from finish surfaces.

B. Remove protective material from wall panel surfaces.

C. Clean and wash prefinished surfaces with mild soap and water; rinse with clean water.

3.06 PROTECTION

A. Protect metal wall panels until completion of project.

B. Touch-up, repair, or replace damaged wall panels or accessories before

Date of Substantial Completion.

END OF SECTION

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Metal Wall Panels