DOWNLOADS | Section 07460: Sheet Metal Roofing

Section 07460: Sheet Metal Roofing
BEMO USA BEMO-Roof System
PART 1: GENERAL
1.1 WORK INCLUDED
1.2 RELATED WORK SPECIFIED ELSEWHERE
1.3 QUALITY ASSURANCE
1.4 REFERENCE LATEST EDITIONS OF PUBLICATIONS AND STANDARDS
1.5 SUBMITTALS
1.6 WARRANTY
PART2: PRODUCTS - Quick Menu
2.1 ACCEPTABLE MANUFACTURER'S
2.2 PRODUCT PERFORMANCE
2.3 MATERIALS
2.4 FALL ARREST/RESTRAINT SYSTEM
PART 3: EXECUTION
3.1 DELIVERY AND STORAGE
3.2 INSPECTION
3.3 INSTALLATION
3.4 DAMAGED MATERIAL AND CLEANING

Part 1: General

1.1 WORK INCLUDED
  1. Furnish and install roofing panels, halters, fasteners, flashing, closures, insulation and related accessories required for a complete roofing system as indicated on the contract documents.
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1.2 RELATED WORK SPECIFIED ELSEWHERE
  1. Section - Flashing and Sheet Metal
  2. Section - Sub-Decking Metal
  3. Section - Roof Insulation
  4. Section - Felt Underlayment
  5. Section - Structural and/or Light Gage Framing
  6. Section - Sealants
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1.3 QUALITY ASSURANCE
  1. The BEMO-Roof system will serve as the minimum acceptable quality required, as manufactured by:

    Middle East
    BEMO Qatar WLL
    Airport Road Office
    P.O. Box 19584 Doha, Qatar
    T: +974 44 666 069
    F: +974 44 666 071

    Southeast Asia
    BEMO International Pte Ltd
    15 Tuas Avenue 4
    Singapore 639367
    Republic of Singapore
    T: +65 6862 5311
    F: +65 6861 8275

  2. Manufacturer's Qualifications
    1. The manufacturer shall have had at least (5) five years experience in architectural and industrial roofing systems.
  3. Installer Qualifications
    1. The installer shall have a minimum of (5) years experience of installation with structural field-formed concealed clip roofing systems.
    2. Manufacturer must train and certify the installer so as to provide a single source responsibility for this portion of the work.
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1.4 REFERENCE LATEST EDITIONS OF
PUBLICATIONS AND STANDARDS
  1. Building Design Codes - Uplift, Live and Dead Loads
    1. ASCE 7-93 Minimum Loads for Buildings and Other Structures (ASCE 7-93) American Society of Civil Engineers (ASCE).
  2. Reference Standards
    1. American Iron and Steel Institute (AISI), Specification
      for the Design of Cold-Formed Steel Structural Members
      (Aug. 1986).
      1. American Society for Testing and Materials (ASTM) (Current Edition)
      2. E1592 "Standard Test Method for Structural Performance of
        Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference.
      3. E283 Test Rate of Air Leakage through Exterior Windows, Curtain Wall, and Doors by Uniform Static Air Pressure Difference.
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1.5 SUBMITTALS
  1. Provide the following:
    Submit the following Test Reports, certified by and Independent Testing Laboratory or an independent professional engineer, to verify that the proposed roofing will meet the performance requirements of this specification.
    1. ASTM E1592 "Standard Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference" test methods.
    2. Halter/Clip Fastener Pull-Out Tests and Calculations.
    3. UL 90 Classification Test Data and report number.
    4. Concentrated Load Test Data
    5. Air Infiltration (E283) and Water Penetration (E331)
      Test Results
  2. With the Proposal
    1. Qualification and/or exceptions to the drawings and specifications
  3. Prior to Fabrication
    1. Submit complete shop drawings, catalog cuts, calculations with all details, roof plans, wall elevations and field installation notes clearly indicated. Drawings must be approved before fabrication can begin.
    2. Performance Requirements - Submit structural design calculations and test reports certified by a registered professional structural engineer licensed in the State of __________ to verify load - carrying capacities and thermal movement allowance of the panel system.
    3. Furnish certified laboratory test reports showing that the proposed system has been tested and conforms to applicable provisions specified herein.
    4. Samples and descriptive date:
      1. Roof panel: Full panel width, 300mm long.
      2. System Clips/Halters: Two Required.Fasteners: Two of each type to be used with a statement identifying the intended use of each.Closure: One metal and one neoprene.
      3. Insulation: 300mm square sample of specified thickness.
      4. Sealants: One sample of each type and statement identifying the intended use of each.
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1.6 WARRANTY
  1. Manufacturer's Warranty: Standard performance warranty provided by the manufacturer to warrant all panels, flashings, sealants, fasteners, and accessories against defective materials and/or workmanship for a period of two (2) years Manufacturer's standard warranty must accompany submittal package.

Part 2: PRODUCTS - Quick Menu

2.1 ACCEPTABLE MANUFACTURER'S
  1. The BEMO-Roof Mechanically Seamed
    Roofing System as manufactured by:

    Middle East
    BEMO Qatar WLL
    Airport Road Office
    P.O. Box 19584 Doha, Qatar
    T: +974 44 666 069
    F: +974 44 666 071

    Southeast Asia
    BEMO International Pte Ltd
    15 Tuas Avenue 4
    Singapore 639367
    Republic of Singapore
    T: +65 6862 5311
    F: +65 6861 8275

  2. Requests to use alternate systems must be submitted in writing to the project designer at least ten (10) days prior to the bid date. Performance requirements, certified statements, samples, sample warranties and descriptive date must accompany the request for substitution.
  3. Manufacturers listed in this section are prequalified manufacturers. Substitution of manufacturers product for those specified will not be allowed at any time during the bidding or construction phases of this project.
  4. Being listed as a prequalified manufacturer does not release the manufacturer from providing complete and acceptable performance data as indicated in this specification.
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2.2 PRODUCT PERFORMANCE
  1. The standing seam roof system shall be designed to safely resist the positive and negative loads as required for the location and type of project designed.
  2. Structural-uniform uplift load capacity of the panel system shall be determined in accordance with the principles of ASTM E1592, "Standard Test Method for Structural Performance of Sheet Metal Roof and Siding Systems by Uniform Static Air Pressure Difference" as follows:
  3. The Factor of Safety on the test results shall be 1.65 for the panel and clip/halter ultimate loads with no increase for wind.
    1. The Factor of Safety for fasteners shall be 3.0 for single fastener in each connection, 2.25 for 2 or more fasteners in each connection and 4.0 in masonry.
    2. Design uplift capacity for condition of gage, span or loading other than those tested may be determined by interpolation of test results.
    3. Deflection shall be I/180 for positive loading.
  4. Water penetration of the panel assembly at 96kg/m2 pressure for
    15 minutes shall have "no uncontrollable leakage" when tested in accordance with ASTM E331.
  5. Air infiltration of panel assembly at 96kg/m2 pressure shall be no more that 0.02 cfm/sf of panel when tested in accordance with ASTM E283.
  6. The panel system shall have a U.L. Class 90 rating.
    The panel system shall have Factory Mutual approval per
    research standard 4471 meeting a (minimum) class 01-90, 0 1-105,
    0 1-120, 0 1-180 .
  7. The panel system shall have "Miami-Dade County Florida" acceptance: Reference NOA #02-0627.04
  8. Panels are to be fabricated full length with absolutely no end lap conditions allowed. The manufacturing equipment must be owned and operated by the manufacturer who must also be the installer
    and take complete responsibility for the entire workscope.
  9. Fasten the roofing panels to the structure through the use of concealed halters/clips which are designed to allow for all panel movement through a temperature differential of 82C without impeding the performance of the panel.
  10. Curved panels, concave, convex or both are to be manufactured in one continuous panel length and curved without crimping or distorting the standing seam legs of the roof panels.
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2.3 MATERIALS
  1. Metal Roof panels are to be BEMO USA BEMO-Roof as manufactured and installed by BEMO USA trained and Certified contractors or approved equal.
    1. Fabricate metal panels from a minimum of 1mm thick aluminum, 1.25mm thick aluminum alloy 3004-H-14 clad, or .76mm (.030"), .91mm (.036") gage G-90 Galvanized steel conforming to ASTM A653 structural quality Grade 33, Grade A and ASTM A792, Grade 50B with an AZ50 coating when coil coated or AZ55 when used bare. Plain Mill Finish or stucco embossed.
    2. Panels shall be a maximum of 305mm wide,
      or 400mm wide with a minimum vertical standing
      leg height of 64mm.
  2. Concealed Clips
    1. Fasten standing seam roofing to structure with specially designed and tested clips/halters manufactured exclusively for the roofing system.
    2. Clips/halters must be designed to allow the roofing materials free movement in either direction parallel to the standing leg of the panel.
  3. Finish
    1. Exterior Surface of Panels: Consisting of a nominal .2 mil primer and nominal .8 mil 70% polyvinylidene topcoat. The color shall be selected from BEMO's standard color chart.
      1. The coating system must have been tested to and exhibited the minimum characteristics of the following ASTM test criteria:
        1. Specular Gloss (ASTM D-523 @ 15.5C), Standard gloss of 20-30.
        2. Pencil Hardness (ASTM D-3363), HB-H
        3. Flexibility, T-Bend (ASTM D-4145), No cracking or tape removal of film at 1-T on painted aluminum and at 2-T on paint steel.
        4. Adhesion/Reverse Impact, (ASTM D-3359, D-2794), 1.5 times metal thickness with no loss of adhesion. No cracking or loss of adhesion.
        5. Abrasion/Falling Sand, (ASTM D-968), Liters to expose 4mm of substrate-50.
        6. Acid Pollutants, (ASTM D-1308) 10% muriatic acid (15 min) no effect, 20% Sulfuric acid (15 min) no effect.
        7. Salt Spray Resistance 5% @ 35C (ASTM B-117). Passes 3,000 hrs on alum. And 1,000 hrs on coated steel.
        8. Humidity Resistance 100% @ 35C (ASTM D-2247). Passes 3,000 hrs on alum. And 1,000 hrs on coated steel.
        9. Weathering Tests (ASTM D-2244 South Florida Exposure, D-822 Color Retention, D-659 Chalk Resistance), Less than 5NBS units change, Passes 5,000 hrs., Rating of 8 min.
  4. Flashing - All trim materials to be same gage and finish as specified for the panel system.
  5. Continuous applied weather seal to be installed during the manufacturing process of the panel system.
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2.4 FALL ARREST/RESTRAINT SYSTEM
  1. Acceptable Product: BEMO Xtreme - Uniline Safety Systems as supplied by the Standing Seam Metal Roof System manufacturer, BEMO Corporation.
    1. The fall arrest/restraint system will not be allowed to penetrate the standing seam metal roofing system. All attachments to the roof will be made to the standing seam and not hinder the thermal movement of the roof panels.
  2. Substitutions:
    1. Substitutions must fully comply with specified requirements
    2. Refer to Specification Section ______ - Product Options and Substitutions for substitution request procedures.
  3. Components
    1. H Brackets universal standing seam roof anchor for end and corner attachment
      1. Bracket Framework: 316-grade stainless steel.
    2. Intermediate Anchor for attachment between H Brackets
      1. Bracket Framework: 316-grade stainless steel.
    3. Unieye End Anchorage Connector.
      1. Unieye: 316-grade stainless steel.
    4. Unigrip Swage
      1. Unigrip Swag: 316-grade stainless steel.
    5. Unigrip Tensioner
      1. Unigrip Tensioner: 316-grade stainless steel.
    6. Uniline Cable
      1. Cover and Core yarn: Polyester
      2. Red neoprene Membrane: Proprietary polychloroprene formula
      3. Compounds: Proprietary latex formula
    7. Unibend Fixed Corner Unit
      1. Unibend Corner: 316-grade stainless steel.
  4. Performance
    1. The Fall Arrest/Restraint System will perform to the following:
      1. The system will withstand 18.4 kN of force parallel (longitudinal) to the standing seam roof system.
      2. The system will withstand 14.8 kN of force 90 (transverse) to the standing seam roof system.
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Part 3: Execution

3.1 DELIVERY AND STORAGE
  1. Secure suitable facilities for storage and protection on site before delivery of materials.
3.2 INSPECTION
  1. The manufacturer/installer shall examine the building to verify that the structure is ready for roofing installation.
  2. Manufacturer/installer cannot proceed until all structural supports and/or substrates are satisfactorily installed in accordance with the drawings, specifications and applicable industry standards.
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3.3 INSTALLATION
  1. The manufacturer must certify the installer in order to provide a complete single source weather-tight package.
  2. All attachments shall allow for thermal expansion and contraction of the roofing materials.
  3. Install all panels in one continuous unbroken length for any length of 106m or less.
  4. Panels are to be mechanically seamed after installation in the field.
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3.4 DAMAGED MATERIAL AND CLEANING
  1. Replace any materials or components that are damaged beyond repair prior to completion.
  2. Each area will be wiped down as it is completed.
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