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SECTION 07 41 43
INSULATED METAL ROOF PANELS
 
 
Copyright 2012 - 2012 ARCAT, Inc. - All rights reserved
** NOTE TO SPECIFIER ** Metl-Span; insulated metal roof panels.
.
This section is based on the products of Metl-Span, which is located at:
1720 Lakepointe Dr. Suite 101
Lewisville, TX 75057-6425
Toll Free Tel: 877-585-9969
Tel: 972-221-6656
Fax: 972-420-9382
Email: request info (ajstorer@metlspan.com)
Web: www.metlspan.com
[ Click Here ] for additional information.
Metl-Span is a world leader in the manufacturing of insulated metal panels for commercial, industrial, and cold storage buildings. Metl-Span is devoted to manufacturing and marketing only the finest insulated building panel products.
As a pioneer in insulated panel development for over thirty years, Metl-Span has made significant contributions to many product design innovations and technology, which are industry standards today. Metl-Span is constantly expanding their research and technological capabilities in order to develop the highest quality products possible.
 
PART 1 GENERAL
 
1.1
SECTION INCLUDES
 
** NOTE TO SPECIFIER ** Delete items below not required for project.
 
A.
Insulated metal roof panels.
B.
Flashing and trim integral to insulated panels.
C.
Clips, anchoring devices, fasteners, and accessories for installation of panel system.
1.2
RELATED SECTIONS
 
** NOTE TO SPECIFIER ** Delete any sections below not relevant to this project; add others as required.
 
A.
Section 07 42 43 - Insulated Metal Wall Panels.
B.
Section 07 62 00 - Sheet Metal Flashing and Trim.
C.
Section 07 71 23 - Manufactured Gutters and Downspouts.
D.
Section 07 72 63 - Waste Containment Assemblies.
E.
Section 07 90 00 - Joint Protection.
F.
Section 08 83 13 - Mirrored Glass Glazing.
1.3
REFERENCES
 
** NOTE TO SPECIFIER ** Delete references from the list below that are not actually required by the text of the edited section.
 
A.
Factory Mutual: FM Approval Standard 4471 Class 1 Roof Panels.
B.
Factory Mutual Research Corporation (FMRC) Standard 4880 - Evaluating Insulated Wall or Wall and Roof/Ceiling Assemblies, Plastic Interior Finish Materials, Plastic Exterior Building Panels, Wall/Ceiling Coating Systems, and Interior or Exterior Finish Systems.
C.
Factory Mutual Research Corporation (FMRC) Standard 4471 - Class 1A Fire Classification and Class SH Hailstorm Classification.
D.
UL 580 - Uplift Resistance of Roof Assemblies
E.
UL 1897 - Uplift Test for Roof Covering Systems
F.
ASTM A 653 - Standard Specification for Steel Sheet, Zinc-Coated (Galvanized) or Zinc-iron Alloy Coated (Galvannealed) by the Hot-Dip Process.
G.
ASTM A 792 - Standard Specification for Steel Sheet, Aluminum-Zinc Alloy Coated Steel by the Hot-Dip Process.
H.
ASTM A 924 - General Requirements for Steel Sheet, Metallic-Coated by the Hot-Dip Process
I.
ASTM C 273 - Shear Properties of Sandwich Core Materials
J.
ASTM C 518 - Standard Test Method for Steady-State Heat Flux Measurements and Thermal Transmission Properties by Means of the Heat Flow Meter Apparatus.
K.
ASTM D 1621 - Compressive Properties of Rigid Cellular Plastics
L.
ASTM D 1622 - Apparent Density of Rigid Cellular Plastics
M.
ASTM D 1623 - Tensile and Tensile Adhesion Properties of Rigid Cellular Plastics
N.
ASTM E 18 - Test Methods for Rockwell Hardness of Metallic Finishes
O.
ASTM E 72 - Standard Test Methods of Conducting Strength Tests of Panels for Building Construction.
P.
ASTM E 84 - Standard Test Method for Surface Burning Characteristics of Building Materials.
Q.
ASTM E 1592 - Structural Performance of Metal Roof and Siding Systems by Uniform Static Air Pressure Difference
R.
ASTM E 1646 - Standard Test Method for Water Penetration of Exterior Metal Roof Panel Systems by Uniform Static Air Pressure Difference.
S.
ASTM E 1680 - Standard Test Method for Rate of Air Leakage Through Exterior Metal Roof Panel System.
T.
CAN/ULC S102 - Standard Method of Test for Surface Burning Characteristics of Building Materials and Assemblies.
U.
CAN/ULC S126 - Standard Method of Test for Fire Spread Under Roof-Deck Assembly.
V.
CAN/ULC S138 - Fire Growth of Insulated Building Panels in a Full-Scale Room Configuration
W.
US Environmental Protection Agency: Energy Star Reflective Roof Products.
X.
US Green Building Council (USGBC): Leadership in Energy and Environmental Design (LEED) Green Building Rating System.
1.4
PERFORMANCE REQUIREMENTS
A.
Structural and Wind load Tests:
1.
Design load/deflection criteria verified from tests per ASTM E 72 "Chamber Method" using a 20 psf (.96 kPa) simulated wind load with a deflection limit of L/240.
2.
FM Approval Standard 4471: Meets windstorm Class 1A [90] and hailstorm Class 1-SH classifications.
3.
Underwriters Laboratory (UL) Uplift Tests for Roof Assemblies: UL Class 90 rated in accordance with UL 580 and shall withstand static uplift load of 140 psf when tested on 7 foot purlin spacing and 166 psf when tested on 5 foot. purlin spacing.
B.
Thermal Performance:
1.
When tested in accordance with ASTM C 518, "measurement of steady state thermal transmission", the panels shall provide a K-factor of .14 btu/sf/hr./deg F at a 75 degree F (23 degree C) mean temperature.
C.
Energy Performance:
1.
Solar Reflectance Index: Minimum 78 for roof slopes of 2:12 or less and 29 for roof slopes greater than 2:12 per ASTM E 1980.
2.
Energy Star Qualified: Listed on USDoE ENERGY STAR Roof Products Qualified Product List www.energystar.com.
3.
California Energy Commission Compliance: Minimum initial solar reflectance of [0.70] and emissivity of [0.75] per CRRC-1, www.coolroofs.org.
D.
Vapor Barrier:
1.
Air Infiltration: Air infiltration shall not exceed .06 cfm per square foot of roof area when tested in accordance with ASTM E 1680 at a static pressure of 12 psf (.576 kPa)
2.
Water Penetration: No uncontrolled water penetration through the panel joints at a static pressure of 12 psf (.576 kPa) when tested in accordance with ASTM E 1646.
 
** NOTE TO SPECIFIER ** ASTM 1680 for air infiltration supersedes ASTM E 283 and ASTM 1646 for water penetration supersedes ASTM E 330.
 
E.
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 25 and a maximum smoke developed rating of 450.
2.
Factory Mutual Research Corporation (FMRC) Standard 4880, 50 foot (15.24 m) High Corner Test for Unlimited Height Structures: Panel assembly shall not support a self-propagating fire which reaches any limits of the 50 foot (15.24 m) high corner test structure as evidenced by flaming or material damage of the ceiling of the assembly.
 
** NOTE TO SPECIFIER ** Maximum pitch is 5:12 for FM 4880 Approval
 
3.
Factory Mutual Research Corporation (FMRC) Standard 4471: Panel shall meet a Class 1A fire classification .
4.
Canadian Certifications - Flame Spread: Evaluation of fire spread over panel's exterior surface shall be conducted and in compliance with CAN/ULC S138 Fire Growth of Insulated Building Panels in a Full-Scale Room Configuration and CAN/ULC S126 Fire Spread Under Roof-Deck Assemblies.
5.
IBC Chapter 26: Panel performance under the above test methods, shall meet the requirements of IBC, Chapter on foam plastics.
1.5
SUBMITTALS
A.
Submit under provisions of Section 01 30 00 - Administrative Requirements.
B.
Product Data: 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.
 
** NOTE TO SPECIFIER ** Delete selection samples if colors have already been selected.
 
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 foot (305 mm) high by full width sample panel for each profile specified indicating the metal, texture, color and finish.
 
** NOTE TO SPECIFIER ** Delete the following paragraphs if LEED is not applicable.
 
F.
LEED Submittals: Provide documentation of how the requirements of Credit will be met:
1.
EA - Energy and Atmosphere:
a.
EA Credit 1: Optimize Energy Performance: Demonstrate percentage of performance improvement that meets or surpasses ASHRAE/IESNA Standard 90.1-2004.
b.
EA Credit 2: Minimum Energy Performance: Roof panels contribute to higher energy efficiency of a building that must comply with a 10 percent improvement in the performance compared to benchmark rating based on ASHRAE/IESNA Standard 90.1-2007 (with errate but without addenda) in EA Prerequisite 2.
2.
MR - Material and Resource:
a.
MR Credit 1.1 & 1.2: Building Reuse:
1)
Maintain Existing Walls, Floors and Roof.
2)
Maintain Interior Non-Structural Elements.
b.
MR Credit 3: Materials Reuse
c.
MR Credit 4: Recycled Content:
1)
Percentage weight of post-consumer and pre-consumer recycled content using materials with recycled content.
2)
Recycled content value of product assembly by weight.
3)
Indicate total value (cost) of each product used.
d.
MR Credit 6: Rapidly Renewable Materials: Foam core in panels using rapidly renewable buildings materials and products for 2.5 percent of the total value of all building materials and products used in the project (based on cost.)
3.
IEQ - Indoor Environmental Quality:
a.
IEQ Credit 4.1: Low-Emitting Materials, Adhesives and Sealants: Product data on adhesives and sealants to comply with standards of South Coast Air Quality Management District Rule #1168.
b.
Product data for paint and coatings have no VOC's.
G.
Buy American Act Certification: Submit documentation certifying that products comply with provisions of the Buy American Act 41 U.S.C 10a-10d.
H.
Manufacturer's Certificates: Certify products meet or exceed specified requirements.
1.6
QUALITY ASSURANCE
 
**NOTE TO SPECIFIER** Select one of the following two "Manufacturer Qualifications" paragraphs and delete the paragraph not required. If specifying "foam core", select A. Select B if specifying "mineral wool core".
 
A.
Manufacturer Qualifications: Company specializing in manufacturing factory foamed in place insulated metal panels with a minimum documented experience of ten years.
B.
Installer Qualifications: Company specializing in installation of the products specified for projects of similar size and scope with minimum five years documented experience.
1.7
DELIVERY, STORAGE, AND HANDLING
A.
Store products in accordance with Manufacturer's written instructions. Store under cover in manufacturer's unopened packaging with labels intact until ready for installation.
B.
Shield foam insulated metal roof panels from direct sunlight until installation.
C.
Store products off the ground, with panels sloped for drainage and covered to protect factory finishes from damage.
D.
Do not overload roof structure with stored materials. Do not permit material storage or traffic on completed roof surfaces.
1.8
WARRANTY
A.
Manufacturer's Warranty: Manufacturer's two 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. Warranty does not include interior painted surface of panels.
 
**NOTE TO SPECIFIER** Extended warranties are available for exterior paint finishes. Consult with panel manufacturer for additional information and complete the warranty period below for the finish specified. Delete if not required.
 
B.
Submit exterior paint manufacturer's written forty year limited warranty on paint finish for adhesion to the substrate and a thirty year limited warranty on chalk and color fade.
PART 2 PRODUCTS
 
2.1
MANUFACTURERS
A.
Acceptable Manufacturer: Metl-Span, which is located at: 1720 Lakepointe Dr. Suite 101; Lewisville, TX 75057-6425; Toll Free Tel: 877-585-9969; Tel: 972-221-6656; Fax: 972-420-9382; Email: request info (ajstorer@metlspan.com); Web: www.metlspan.com
 
** NOTE TO SPECIFIER ** Delete one of the following two paragraphs; coordinate with requirements of Division 1 section on product options and substitutions.
 
B.
Substitutions: Not permitted.
C.
Requests for substitutions will be considered in accordance with provisions of Section 01 60 00 - Product Requirements.
2.2
MATERIALS
A.
Insulated Metal Roof Panels: Metl-Span CRF Insulated Metal Roof Panel, roll-formed exterior and interior steel sheet faces chemically bonded to continuously foamed-in-place insulated core; laminated panels are not acceptable.
1.
Exterior Face:
a.
Configuration: 2 inch high standing seam with a Mesa Wave pattern, nominal 1/8 inch deep, between the seams.
b.
Material:
c.
Material: G-90 galvanized steel conforming to ASTM A 653 or, at the manufacturer's discretion, AZ-50 aluminum-zinc coated steel conforming to ASTM A-792, minimum grade 33, with a stucco embossed texture, or acrylic coated AZ-55 unpainted with a stucco embossed texture.
d.
Thickness:
 
** NOTE TO SPECIFIER ** Select one of the following liners options and delete the one not required.
 
1)
24 gauge (0.0250 inch).
2)
22 gauge (0.0312 inch).
2.
Interior Faces:
a.
Configuration:
 
** NOTE TO SPECIFIER ** Select one of the following configuration options and delete the one not required.
 
1)
Mesa wave pattern, nominal 1/8 inch deep.
2)
Light Mesa wave pattern, nominal 1/16 inch deep.
b.
Material: G-90 galvanized steel conforming to ASTM A 653 or. at the manufacturer's discretion, AZ-50 aluminum-zinc coated steel conforming to ASTM A-792, minimum grade 33, with a stucco embossed texture.
c.
Liner Thickness:
 
** NOTE TO SPECIFIER ** Select one of the following thickness options and delete the ones not required.
 
1)
26 gauge (0.0187 inch).
2)
24 gauge (0.0250 inch).
3)
22 gauge (0.0312 inch).
3.
Module Width:
 
** NOTE TO SPECIFIER ** Select one of the following module width options and delete the one not required.
 
a.
30 inches.
b.
36 inches .
c.
42 inches.
4.
Panel Length: 8 feet to 53 feet with factory cut panel ends, factory notching and factory swaged ends.
5.
Panel Thickness:
 
** NOTE TO SPECIFIER ** Select one of the following panel thickness options and delete the ones not required.
 
a.
2 inches
b.
2-1/2 inches
c.
3 inches
d.
4 inches
e.
5 inches
f.
6 inches
6.
Foam Core: Continuously foamed-in-place, zero ODP and zero VOC closed cell polyurethane, Factory Mutual Class 1 approval.
7.
Thermal Value: K-factor, Btu in/ft2 hr degrees F @ 75 degrees F mean core temperature = 0.140.
8.
Joint: Mechanically closed single lock standing seam at the exterior side joint. Interior side joint is a single tongue and groove interlock.
 
**NOTE TO SPECIFIER ** Select one of the following six "Panel General Requirements" paragraphs corresponding to the product(s) required and delete those not required.
 
B.
Panel Finish:
 
** NOTE TO SPECIFIER ** Select one of the following three options for the exterior face finish. High-build coatings are also available for aggressive environments. CF Partition or Ceiling panel standard finish is Polyester Igloo White for both interior and exterior faces.
 
1.
Exterior Finish: One coat 70 percent polyvinylidene fluoride, nominal 0.7 mil (0.02 mm) thick, over 0.2 mil (0.005 mm) primer; color as selected by Architect from manufacturer's standard colors.
2.
Exterior Finish: One coat siliconized polyester, nominal 0.7 mil (0.02 mm) thick, over 0.2 mil (0.005 mm) thick primer; color as selected by Architect from manufacturer's standard colors.
3.
Exterior Finish: One coat, factory applied coil coating in standard Igloo White, nominal 0.7 mil (0.02 mm) thick, over 0.2 mil (0.005 mm) primer; color USDA compliant. For interior exposure only.
 
** NOTE TO SPECIFIER ** The following interior finish is standard however other interior finishes are available. If another finish is required, consult with panel manufacturer and edit the second paragraph as required and delete the first. Stainless steel is recommended in areas requiring heavy wash-down of the inside panel face, to prevent corrosion; no warranty is offered for the interior finish.
 
4.
Interior Finish: One coat, factory applied coil coating in standard Igloo White, nominal 0.7 mil (0.02 mm) thick, over 0.2 mil (0.005 mm) primer; color USDA compliant.
5.
Interior Finish: ___________________.
 
** NOTE TO SPECIFIER ** Include the following accessories as required for the project. Delete if not required.
 
C.
Flashing and Trim: Brake-formed sheet metal in the same thickness and finish to match the panels.
D.
Fasteners: Clips, anchoring devices, fasteners, and accessories for installation of panel system as recommended by panel manufacturer for the system specified.
E.
Sealant: Sealant as recommended by panel manufacturer.
PART 3 EXECUTION
 
3.1
EXAMINATION
A.
Examine structural members before beginning installation to ensure that all supporting members are straight, level, plumb and satisfactory for panel installation.
B.
Panel Support Tolerances
1.
Overall rake to rake tolerances plus or minus 2 inches or plus or minus 1 inch at each rake
2.
Overall eave to ridge tolerance plus or minus 1 inch or plus or minus 1/2 inch at the eave, end lap and ridge.
3.
Vertical deviation from the nominal roof plane of plus or minus 1/8 inch in any 5 foot length, plus or minus 1/4 inch in any 20 foot length and plus or minus 1/2 inch over the entire roof area.
C.
Verify roof openings, curbs, pipes, sleeves, ducts, or vents through roof are solidly set, reglets are in place, and nailing strips located.
D.
Correct defective conditions before beginning work.
E.
If substrate is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.
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.
Protective film on trim shall be removed before exposure to sunlight.
E.
Install sealants where indicated to clean dry surfaces only without skips or voids, to ensure weather tightness and integrity of the vapor barrier.
3.3
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.
3.4
PROTECTION
A.
Protect installed products until completion of project.
B.
Touch-up, repair or replace damaged products before Substantial Completion.
END OF SECTION