HomeMy WebLinkAbout10-8213-Rooftop-Equipment-Screens_Rev_1Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011 Addendum No. 10, March 5, 2021
ROOFTOP EQUIPMENT SCREENS
10 8213.13 - 1
SECTION 10 8213.13
ROOFTOP EQUIPMENT SCREENS
PART 1 - GENERAL
1.1 RELATED DOCUMENTS
A. Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
1.2 SUMMARY
A. Section includes rooftop equipment screens and supporting steel framework.
B. Related Requirements:
1. Section 01 8113 “Sustainable Design Requirements” for general requirements and
procedures for compliance with certain USGBC LEED prerequisites and credits.
2. Section 05 1200 “Structural Steel” for structural steel framing.
3. Section 05 5000 “Metal Fabrications” for miscellaneous framing and supports.
4. Section 07 5419 “Polyvinyl-Chloride (PVC) Roofing” for single-ply elastomeric roofing
system.
5. Section 07 6200 "Sheet Metal Flashing and Trim" for custom- and site-fabricated sheet
metal flashing and trim.
6. Section 07 7200 "Roof Accessories" for hatch-type heat and smoke vents, elevator
penthouse ventilators with operable dampers, roof drain markers, and other
manufactured roof accessory units.
7. Division 23 Sections for roof mounted HVAC equipment.
1.3 PREINSTALLATION MEETINGS
A. Preinstallation Conference: Conduct conference at Project site.
1. Meet with Owner, Architect, Owner's insurer if applicable, rooftop equipment screens
Installer, rooftop equipment screen manufacturer's representative, structural-support
Installer, and installers whose work interfaces with or affects rooftop equipment screens.
2. Review and finalize construction schedule and verify availability of materials, Installer's
personnel, equipment, and facilities needed to make progress and avoid delays.
3. Review methods and procedures related to rooftop equipment screen installation,
including manufacturer's written instructions.
4. Examine support conditions for compliance with requirements, including alignment
between and attachment to structural members.
5. Review flashings, roof penetrations, and condition of other construction that affect rooftop
equipment screens.
6. Review temporary protection requirements for rooftop equipment screens during and
after installation.
7. Review procedures for repair of rooftop equipment screens damaged after installation.
8. Document proceedings, including corrective measures and actions required, and furnish
copy of record to each participant.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011 Addendum No. 10, March 5, 2021
ROOFTOP EQUIPMENT SCREENS
10 8213.13 - 2
1.4 ACTION SUBMITTALS
A. Make Submittals in accordance with Section 01 3300 “Submittal Procedures.”
B. Product Data: For each type of product.
1. Include construction details, material descriptions, dimensions of individual components
and profiles, and finishes for each type of rooftop equipment screen panel and accessory.
C. Sustainable Design Submittals:
1. Recycled Content: Provide manufacturers’ product documentation that includes recycled
content claims for the products contributing towards compliance. Claims must conform to
the definition in ISO 14021 -1999, Environmental Labels and Declarations, Self-Declared
Environmental Claims.
a. Complete "LEED Materials Documentation Sheet" with MRc3 Option 2 information
for products with recycled content installed in the building.
D. Shop Drawings: For rooftop equipment screens and accessories. Include plans, elevations,
sections, details, and attachments to other Work. Show panel profiles and spacing.
1. For installed rooftop equipment screens indicated to comply with design loads, include
structural analysis data signed and sealed by the qualified professional engineer
responsible for their preparation.
E. Samples for Verification: For each type of exposed finish, prepared on Samples of size
indicated below.
1. Metal Panels: 12 inches long by actual panel width. Include fasteners, closures, and
other metal panel accessories.
1.5 INFORMATIONAL SUBMITTALS
A. Qualification Data: For Installer.
B. Product Test Reports: Based on evaluation of comprehensive tests performed by an
independent qualified testing agency or by manufacturer and witnessed by a qualified
independent testing agency, for each type of rooftop equipment screen.
C. Design Data: Structural design calculations, bearing seal and signature of professional
engineer licensed to practice in the State in which the project is located. Include reactions at
base supports for verification of structure.
1.6 CLOSEOUT SUBMITTALS
A. Maintenance Data: For rooftop equipment screens to include in maintenance manuals.
1.7 QUALITY ASSURANCE
A. Erector Qualifications: An experienced erector who has specialized in erecting and installing
work similar in material, design, and extent to that indicated for this Project and who is
acceptable to manufacturer.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011 Addendum No. 10, March 5, 2021
ROOFTOP EQUIPMENT SCREENS
10 8213.13 - 3
1.8 DELIVERY, STORAGE, AND HANDLING
A. Deliver components, metal panels, and other manufactured items so as not to be damaged or
deformed. Package metal panels for protection during transportation and handling.
B. Unload, store, and erect metal panels in a manner to prevent bending, warping, twisting, and
surface damage.
C. Stack metal panels horizontally on platforms or pallets, covered with suitable weathertight and
ventilated covering. Store metal panels to ensure dryness, with positive slope for drainage of
water. Do not store metal panels in contact with other materials that might cause staining,
denting, or other surface damage.
D. Retain strippable protective covering on metal panels during installation.
1.9 FIELD CONDITIONS
A. Field Measurements: Verify rooftop equipment screen dimensions by field measurements
before fabrication and indicate measurements on Shop Drawings.
1.10 COORDINATION
A. Coordinate rooftop equipment screens installation with roofing, flashing, trim, and other
adjoining work to provide a leakproof, secure, and noncorrosive installation.
1.11 WARRANTY
A. Special Warranty on Panel Finishes: Manufacturer's standard form in which manufacturer
agrees to repair finish or replace metal panels that show evidence of deterioration of factory-
applied finishes within specified warranty period.
1. Exposed Panel Finish: Deterioration includes, but is not limited to, the following:
a. Color fading more than 5 Hunter units when tested according to ASTM D 2244.
b. Chalking in excess of a No. 8 rating when tested according to ASTM D 4214.
c. Cracking, checking, peeling, or failure of paint to adhere to bare metal.
2. Finish Warranty Period: 20 years from date of Substantial Completion.
PART 2 - PRODUCTS
A. LEED REQUIREMENTS
B. Provide products with the maximum amount of recycled content possible.
C. Provide products manufactured and extracted within 100 miles of the project site whenever
possible.
2.2 PERFORMANCE REQUIREMENTS
A. Structural Performance: Provide rooftop equipment screen systems capable of withstanding the
effects of the following loads, based on testing according to ASTM E 72:
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011 Addendum No. 10, March 5, 2021
ROOFTOP EQUIPMENT SCREENS
10 8213.13 - 4
1. Wind Loads: As indicated on Drawings.
2. Other Design Loads: As indicated on Drawings.
3. Deflection Limits: For wind loads, no greater than 1/180 of the span.
B. Thermal Movements: Allow for thermal movements from ambient and surface temperature
changes by preventing buckling, opening of joints, overstressing of components, failure of joint
sealants, failure of connections, and other detrimental effects. Base calculations on surface
temperatures of materials due to both solar heat gain and nighttime-sky heat loss.
1. Temperature Change (Range): 120 deg F, ambient; 180 deg F, material surfaces.
C. Acoustical Performance:
1. Noise Reduction Coefficient (NRC): Not less than 1.05, when measured in accordance
with the requirements of ASTM C423.
2. Sound Transmission Class (STC): Not less than 35 when tested in accordance with the
requirements of ASTM E90.
2.3 MANUFACTURERS
A. Basis-of-Design Product: Subject to compliance with requirements, provide Silent Screen
Panels by Empire Acoustical Systems or a comparable product by one of the following or equal:
1. George Koch Sons, LLC.
2. RoofScreen Mfg.
2.4 ROOFTOP EQUIPMENT SCREEN PANELS
A. Formed Metal Sound Barrier And Absorption Panels: Partially perforated, formed metal panels
with acoustical insulation core, secured to steel frame.
1. Panel Size: 12 inches wide by 2-¾ inches thick.
2. Panel Face: 22 gauge steel with 3/16 inch diameter perforations in a 3/8 inch staggered
pattern.
3. Panel Back: 16 gauge non-perforated steel.
4. Acoustical Fill: Six pound density mineral-wool board Insulation.
2.5 MATERIALS
A. Metallic-Coated Steel Sheet: Zinc-coated (galvanized) steel sheet complying with
ASTM A653/A653M, G90 coating designation, or aluminum-zinc alloy-coated steel sheet
complying with ASTM A792/A792M, Class AZ50 coating designation; structural quality.
Prepainted by the coil-coating process to comply with ASTM A755/A755M.
B. Steel shapes, plates and bars shall conform to the requirements of Standard Specification for
Steel for Bridges and Buildings, ASTM A36.
C. Fasteners for Acoustical Panels: Self-tapping screws, bolts, nuts, self-locking rivets and bolts,
end-welded studs, and other suitable fasteners designed to withstand design loads.
1. Self-drilling Type 410 stainless steel or self-tapping Type 304 stainless steel or zinc-alloy-
steel hex washer head, with EPDM or PVC washer under heads of fasteners bearing on
weather side of metal panels.
2. Steel bolts and nuts shall conform to ASTM B-6.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011 Addendum No. 10, March 5, 2021
ROOFTOP EQUIPMENT SCREENS
10 8213.13 - 5
D. Mineral-Wool Board Insulation, Type II, Unfaced: ASTM C612, Type II; passing ASTM E136 for
combustion characteristics.
1. Nominal Density: 6 lb/cu. ft.
2. Flame-Spread Index: Not more than 15 when tested in accordance with ASTM E84.
3. Smoke-Developed Index: Not more than zero when tested in accordance with
ASTM E84.
E. Structural Support Framing: Refer to Section 05 1200 “Structural Steel Framing” and Section
05 5000 “Metal Fabrications” for structural steel support framing including tubular steel posts,
base plates, channels, and angles.
2.6 FINISHES
A. Comply with NAAMM’s “Metal Finishes Manual for Architectural and Metal Products” for
recommendations for applying and designating finishes.
B. Steel Panels and Accessories:
1. Three-Coat Fluoropolymer: AAMA 621. Fluoropolymer finish containing not less than 70
percent polyvinylidene fluoride (PVDF) resin by weight in both color coat and clear
topcoat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply with
coating and resin manufacturers' written instructions for seacoast and severe
environments.
PART 3 - EXECUTION
3.1 EXAMINATION
A. Examine substrates, areas, and conditions, with Installer present, for compliance with
requirements for installation tolerances, rooftop equipment screen supports, and other
conditions affecting performance of the Work.
1. Examine framing to verify that girts, angles, channels, studs, and other structural support
members and anchorage have been installed within alignment tolerances required by
rooftop equipment screen manufacturer.
B. Proceed with installation only after unsatisfactory conditions have been corrected.
3.2 PREPARATION
A. Miscellaneous Supports: Install subframing, furring, and other miscellaneous support members
and anchorages according to ASTM C754 and rooftop equipment screen manufacturer's written
recommendations.
3.3 INSTALLATION
A. Install rooftop equipment screens according to manufacturer's written instructions in orientation,
sizes, and locations indicated. Install panels perpendicular to supports unless otherwise
indicated. Anchor metal panels and other components of the Work securely in place, with
provisions for thermal and structural movement.
1. Shim or otherwise plumb substrates receiving metal panels.
2. Install screw fasteners in predrilled holes.
Dennis Yarmouth Intermediate Middle School January 19, 2021
Dennis Yarmouth Regional School District 100% Construction Documents
Perkins Eastman DPC, project #71011 Addendum No. 10, March 5, 2021
ROOFTOP EQUIPMENT SCREENS
10 8213.13 - 6
3. Locate and space fastenings in uniform vertical and horizontal alignment.
4. Install flashing and trim as metal panel work proceeds.
B. Metal Protection: Where dissimilar metals contact each other or corrosive substrates, protect
against galvanic action as recommended in writing by rooftop equipment screen manufacturer.
C. Accessory Installation: Install accessories with positive anchorage and provide for thermal
expansion. Coordinate installation with flashings and other components.
1. Install components required for a complete rooftop equipment screen system including
trim, copings, corners, seam covers, flashings, sealants, gaskets, fillers, closure strips,
and similar items. Provide types indicated by rooftop equipment screen manufacturer or,
if not indicated, provide types recommended by rooftop equipment screen manufacturer.
3.4 CLEANING AND PROTECTION
A. Remove temporary protective coverings and strippable films, if any, as rooftop equipment
screen panels are installed, unless otherwise indicated in manufacturer's written installation
instructions. On completion of rooftop equipment screen installation, clean finished surfaces as
recommended by rooftop equipment screen manufacturer. Maintain in a clean condition during
construction.
B. After rooftop equipment screen installation, clear weep holes and drainage channels of
obstructions, dirt, and sealant.
C. Replace rooftop equipment screen panels that have been damaged or have deteriorated
beyond successful repair by finish touchup or similar minor repair procedures.
END OF SECTION