1.1 SUMMARY
A.Fire resistive metal panel cladding system with insulating structural mineral wool core for the exterior walls, partitions, ceilings and liners where indicated on the drawings. Also included, are all necessary trims, fasteners and sealants as required for a weathertight installation.
1.Steel faced factory laminated profiled panels with compatible joinery. Panels shall be designed for installation in a vertical or horizontal orientation.
2.Sealants between panels and their intersection if vapor barrier is required.
1.2 RELATED SECTIONS
A.Section 07 62 00 (previously 07620) – Sheet Metal Flashing and Trim
B.Section 07 92 00 (previously 07900) – Joint Sealants
1.3 REFERENCES
A.ASTM A 653 – Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-iron Alloy Coated (Galvannealed) by the Hot-Dip Process.
B.ASTM C 518 – Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.
C.ASTM E 72 – Standard Test Methods of Conducting Strength Tests of Panels for Building Construction
D.ASTM E 84 – Standard Test Method for Surface Burning Characteristics of Building Materials.
E.ASTM E 119/E 119-00a – Standard Test Methods for Fire Tests of Building Construction and Materials.
F.ASTM E 283 – Standard Method for Determining the Rate of Air Leakage Through Exterior Window, Curtain Walls, and Doors Under Specified Pressure Differences Across the Specimen.
G.ASTM E 331 – Standard Test Method for Water Penetration of Exterior Windows, Skylights, Doors, and Curtain Wall by Uniform Static Air Pressure Difference.
H.ASTM E 814 (UL 1471) – Standard Test Method for Fire Tests of Through-Penetration Fire Stops.
I.CAN/ULC S101 – Standard Methods of Fire Endurance Tests of Building Construction and Materials.
1.4 PERFORMANCE REQUIREMENTS
A.Structural Tests: The design load/deflection criteria shall be verified from tests per ASTM E 72 “Air Bag Method” using a 20 psf (.96 kPa) simulated wind load. A deflection limit of L/240 for wall and ceiling panels shall apply.
B.Thermal Transmission: Testing in accordance with ASTM C 518, “measurement of steady state thermal transmission”, the panels shall provide a K-factor of .275 btu/sf/hr/deg. F at 75° F. (24° C) mean temperature.
C.Vapor Barrier
1.Air Infiltration: Air infiltration shall not exceed .04 cfm per square foot of wall area when tested per ASTM E 283 at a static pressure of 12.0 psf (.576 kPa).
2.Static Water Penetration: There shall be no uncontrolled water penetration through the panel joints at a static pressure of 20.0 psf (.96 kPa) when tested per ASTM E 331.
D.Fire
1.Surface Burning Characteristics: The insulated core shall have been tested in accordance with ASTM E 84 for surface burning characteristics. The core shall have a maximum flame spread of 0 and a maximum smoke developed rating of 0.
2.Fire Resistive Data:
a.The finished panel in a four (4) inch thickness shall meet the requirements of a one (1) hour fire endurance rating for nonbearing wall in accordance with UL 263 Fire Endurance Tests, Design No. U050 and ASTM E 119 Fire Test of Building Construction and Materials.
b.The finished panel in a seven (7) inch thickness shall meet the requirements of a two (2) hour fire endurance rating for nonbearing wall in accordance with UL 263 Fire Endurance Tests, Design No. U050 and ASTM E 119 Fire Test of Building Construction and Materials.
c.The one (1) and two (2) hour fire rated wall panel shall meet the requirements of composite panel penetration conditions listed by UL and in accordance with ASTM E 814 Fire Tests of Through-Penetration Fire Stops. Maximum diameter of opening is 6-7/8” (175 mm). Opening can be located on or off panel unit joints.
d.The finished panel in a six (6) inch thickness shall meet the requirements of a one and a half (1-1/2) hour endurance rating for a ceiling in accordance with ASTM E 119-00a and CAN/ULC/S101 Fire Test of Building Construction and Materials, Design No. FC200.
1.5 SUBMITTALS
A.Submit under provisions of Section 01 33 00 (previously 01300).
B.Manufacturer’s data sheets on each product to be used, including:
1.Preparation instructions and recommendations.
2.Storage and handling requirements and recommendations.
3.Material type, metal thickness and finish.
4.Installation methods.
C.Shop Drawings: Including elevations, fastening patterns, sections of each condition and details as required.
D.Selection Samples: For each finish product specified, two complete sets of color chips representing manufacturer’s full range of available colors and patterns.
E.Panel Sample: Submit 1’ (305 mm) high by full width sample panel for each profile specified indicating the metal, texture and finish.
F.Manufacturer’s Certificates: Certify products meet or exceed specified requirements.
1.6 QUALITY ASSURANCE
A.Manufacturer Qualifications: Company specializing in manufacturing factory laminated insulated metal panels with a minimum documented experience of ten (10) years.
B.Installer Qualifications: Company specializing in installation of the products specified for projects of similar size and scope with minimum five (5) years documented experience.
1.7 SUBSTITUTIONS
A.Materials, accessories and testing specified shall establish the minimum level of quality, performance, dimension and appearance required of any substitution.
B.No substitution will be considered unless a written request to the specifying architect is received for approval at least ten (10) days prior to the established bid date. Evidence shall be submitted to demonstrate equivalency to the products and performance levels specified. A complete description of the substitution including details referenced to the wall panel shown on the contract drawings.
1.Independent test reports verifying compliance with specified performance requirements.
2.A detailed listing of each specification item with which the substitution does not fully comply.
C.The manufacturer or wall panel contractor proposing the substitution shall pay the costs of any other subcontractor affected by the proposed substitution.
1.8 DELIVERY STORAGE AND HANDLING
A.Store products in manufacturer’s unopened packaging until ready for installation.
B.Store products off the ground, with panels sloped for drainage and covered to protect factory finishes from damage.
1.9 WARRANTY
A.Manufacturer’s Warranty: Manufacturer’s two (2) year limited warranty that panels are free from defects in materials and workmanship, beginning from the date of shipment of panels, but excluding coil coatings (paint finishes) covered under a separate warranty.
B.The installation contractor shall issue a separate one (1) year warranty against defects in installed materials and workmanship, beginning from the date of substantial completion of the installation.
C.Submit exterior paint manufacturer’s twenty (20) year limited warranty on paint finish against cracking, peeling, blistering, chalk and color change.
Note: No warranty is offered for the interior painted surface of the panel.
PART 2 – PRODUCTS
2.1 MANUFACTURER
A.Acceptable Manufacturer: Metl-Span; 1497 North Kealy, Lewisville, TX 75057; Toll-Free (877) 585-9969; Fax: (972) 436-0648;
E-mail: panel@metlspan.com; Web site: http://www.metl-span.com
B.Requests for substitutions will be considered in accordance with provisions of Section 01 23 00 (previously 01230).
2.2 PANEL DESIGN
A.Panel – General Requirements: Roll-formed exterior and interior steel sheet faces laminated to a structural mineral wool core. Metl-Span III; ThermalSafe.
1.Exterior and Interior Faces: ASTM A 653, minimum Grade 33, stucco embossed, G-90 galvanized and/or aluminum-zinc coated steel, unless otherwise indicated.
2.Longitudinal Joint Sealants: Silicone sealant shall be field applied to insure maximum vapor and water tightness.
Note: Sealant is optional for fire resistive approval and is only needed for vapor barrier continuity when required.
3.Core: Non-combustible, rigid mineral wool insulation board that is water repellent with fibers oriented perpendicular to the panel faces. Panels with fibers oriented parallel to the panel faces are not acceptable.
4.Exterior Finish: One coat 70% polyvinylidene fluoride 0.7 mil (17.5 microns) nominal thickness over 0.2 mil (5 microns) base primer in manufacturer’s standard colors; or one coat Siliconized Polyester 0.7 mil (17.5 microns) nominal thickness over 0.2 mil (5 microns) primer in manufacturer’s standard colors.
5.Interior Finish: One coat Polyester 0.7 mil (17.5 microns) nominal thickness over 0.2 mil (5 microns) primer in USDA compliant Igloo White.
B.Metl-Span III ThermalSafe Wall Panel: Through-panel fasteners that attach both faces of the panel at the connections of the panel ends to the support framing to conform to the requirements of the wall panel’s fire resistance rating. The side joint of the wall panel shall have flush double tongue and groove joinery of the metal faces combined with the LockGuard™ integral spline for uninterrupted continuity of the mineral wool core.
1.Exterior Profile: Light Mesa Wave Pattern, 1/32” deep
2.Interior Profile: Light Mesa Wave Pattern, 1/32” deep
3.Module Width: 42”
4.Exterior Face: Stucco embossed G-90 galvanized and/or aluminum-zinc coated steel: 26ga (0.0187”), 24ga (0.0250”)
5.Interior Face: Stucco embossed G-90 galvanized and/or aluminum-zinc coated steel: 26ga (0.0187”), 24ga (0.0250”) & Type 304 unpainted 26ga stainless steel
6.Thickness: 4”, 5”, 6”, 7” & 8”
C.Flashing and trim shall be brake-formed sheet metal in the same thickness and finish to match the panels.
PART 3 – EXECUTION
3.1 EXAMINATION
A.Panel installer shall examine all structural steel before beginning installation to ensure that all supporting members are straight, level, plumb and satisfactory for panel installation.
B.Do not begin installation until unsatisfactory conditions are corrected.
C.Start of installation shall signify structure and adjacent conditions as being proper and acceptable.
3.2 INSTALLATION
A.Install in accordance with manufacturer’s instructions and recommendations including approved shop drawings, installation guidebook and manufacturer’s handbook of construction details.
B.Form panel shape as indicated on drawings, accurate in size, square, and free from distortion or defects.
C.Install flashing and trim true and in proper alignment.
D.Install sealants where indicated to clean dry surfaces only without skips or voids, to ensure weathertightness and integrity of the vapor barrier.
3.3 DAMAGED MATERIAL
A.Damage caused by the manufacturer or wall panel contractor shall be replaced or repaired to as new construction.
B.The panel installer shall inspect and approve each completed wall area and shall be responsible for protection of completed work from damage by other trades.
3.4 CLEANING
A.Replace damaged panels and other components of work, which cannot be repaired by finish touch-up or similar minor repair.
B.Wipe finished surfaces clean of any filings caused by drilling or cutting to prevent rust staining.