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This Product MasterSpec Section is licensed by ARCOM to Bristolite Daylighting Systems, Inc.
("Licensee").
This Product MasterSpec Section modifies the original MasterSpec text, and does not include the
full content of the original MasterSpec Section.
Revisions made to the original MasterSpec text are made solely by the Licensee and are not endorsed by,
or representative of the opinions of, ARCOM or The American Institute of Architects (AIA). Neither
AIA nor ARCOM are liable in any way for such revisions or for the use of this Product MasterSpec
Section by any end user. A qualified design professional should review and edit the document to suit
project requirements.
For more information, contact Bristolite Daylighting Systems, Inc. 401 E Goetz Avenue, Santa Ana, CA
92707;
Phone: (714) 540-8950; Fax: (714) 540-5415; Website: www.bristolite.com; Email:
info@bristolite.com.
For information about MasterSpec contact ARCOM at (800) 424-5080 or visit www.MasterSpec.com.
SECTION 086300 - METAL-FRAMED SKYLIGHTS
TIPS:
To view non-printing Editor's Notes that provide guidance for editing, click on Masterworks/Single-File
Formatting/Toggle/Editor's Notes.
To read detailed research, technical information about products and materials, and coordination
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PART 1 - GENERAL
1.1
RELATED DOCUMENTS
A.
1.2
Drawings and general provisions of the Contract, including General and Supplementary
Conditions and Division 01 Specification Sections, apply to this Section.
SUMMARY
A.
Section includes skylights with metal framing.
B.
Related Sections:
1.
2.
Section 084433 "Sloped Glazing Assemblies" for glazed curtain walls in which the
glazed panels are primarily on a sloped plane.
Section 084513 "Structured-Polycarbonate-Panel Assemblies" for translucent structuredpolycarbonate-panel assemblies used as skylights.
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3.
4.
5.
1.3
Section 084523 "Fiberglass-Sandwich-Panel Assemblies" for translucent fiberglasssandwich-panel assemblies used as skylights.
Section 086100 "Roof Windows" for operable and non-operable roof windows framed of
wood, aluminum, or vinyl.
Section 086200 "Unit Skylights" for skylights without framing except at the perimeter of
the glazing.
ACTION SUBMITTALS
A.
Product Data: For each type of product indicated. Include construction details, material
descriptions, dimensions of individual components and profiles, and finishes for metal-framed
skylights.
B.
LEED Submittals:
1.
2.
C.
Product Data for Credit IEQ 4.1: For sealants used inside the weatherproofing system,
documentation including printed statement of VOC content.
Laboratory Test Reports for Credit IEQ 4: For sealants used inside the weatherproofing
system, documentation indicating that they comply with the testing and product
requirements of the California Department of Health Services' "Standard Practice for the
Testing of Volatile Organic Emissions from Various Sources Using Small-Scale
Environmental Chambers."
Shop Drawings: For metal-framed skylights. Include plans, elevations, sections, details, and
attachments to other work.
1.
2.
Include details of provisions for assembly expansion and contraction and for draining
moisture within the assembly to the exterior.
Include full-size isometric details of each vertical-to-horizontal intersection of assembly,
showing the following:
a.
b.
c.
d.
e.
3.
Joinery including concealed welds.
Anchorage.
Expansion provisions.
Glazing.
Flashing and drainage.
Include laboratory mockup Shop Drawings, prepared by a qualified preconstruction
testing agency, showing details of laboratory mockup.
a.
Resubmit Shop Drawings with changes made to details of mockup to successfully
complete preconstruction testing.
D.
Samples for Initial Selection: For units with factory-applied color finishes.
E.
Samples for Verification: For each type of exposed finish required, in manufacturer's standard
sizes.
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F.
Fabrication Sample: Of each framing intersection of assemblies, made from 12-inch (305-mm)
lengths of full-size components and showing details of the following:
1.
2.
3.
4.
5.
G.
1.4
Joinery including concealed welds.
Anchorage.
Expansion provisions.
Glazing.
Flashing and drainage.
Delegated-Design Submittal: For metal-framed skylights indicated to comply with performance
requirements and design criteria, including analysis data signed and sealed by the qualified
professional engineer responsible for their preparation.
INFORMATIONAL SUBMITTALS
A.
Qualification Data: For qualified [Installer] [testing agency].
B.
Welding certificates.
C.
Preconstruction Test Reports: Prepared by a qualified preconstruction testing agency.
D.
Compatibility and Adhesion Test Reports: For structural-sealant-glazed skylights, test reports
from sealant manufacturer indicating that joint sealants have been tested for each material that
will come in contact with sealants.
E.
Product Test Reports: Based on evaluation of comprehensive tests performed by a qualified
testing agency, for metal-framed skylights.
F.
Field quality-control reports.
G.
Warranties: Sample of special warranties.
1.5
QUALITY ASSURANCE
A.
Installer Qualifications: Manufacturer's authorized representative who is trained and approved
for installation of metal-framed skylights required for this Project.
B.
Testing Agency Qualifications: Qualified according to ASTM E 699 for testing indicated.
C.
Product Options: Information on Drawings and in Specifications establishes requirements for
skylights' aesthetic effects and performance characteristics. Aesthetic effects are indicated by
dimensions, arrangements, alignment, and profiles of components and assemblies as they relate
to sightlines, to one another, and to adjoining construction. Performance characteristics are
indicated by criteria subject to verification by one or more methods including testing conducted
by an independent testing agency and in-service performance.
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1.
Do not modify intended aesthetic effects, as judged solely by Architect, except with
Architect's approval. If modifications are proposed, submit comprehensive explanatory
data to Architect for review.
D.
Welding Qualifications: Qualify procedures and personnel according to AWS D1.2/D1.2M,
"Structural Welding Code - Aluminum."
E.
Structural-Sealant Glazing: Comply with recommendations in ASTM C 1401, "Guide for
Structural Sealant Glazing," for joint design and quality-control procedures.
1.
2.
3.
F.
Joint designs are reviewed and approved by structural-sealant manufacturer.
Quality-control program development and reporting comply with ASTM C 1401
recommendations for material qualification procedures, preconstruction sealant-testing
program, and procedures and intervals for fabrication and installation reviews and
checks.
Perform manufacturer's standard tests for compatibility and adhesion of sealants with
each material that will come in contact with sealants.
Provide metal-framed skylights that comply with test-performance requirements indicated, as
evidenced by reports [of tests performed on manufacturer's standard assemblies] [based on
Project-specific preconstruction testing] by a qualified independent testing agency.
1.
2.
3.
4.
5.
Preconstruction Testing: [Owner will engage] [Engage] a qualified testing agency to
perform preconstruction testing on laboratory mockups of assemblies.
Build laboratory mockups at testing agency facility using personnel, materials, and
methods of construction that will be used at Project site.
Before performing testing on structural-sealant-glazed assemblies, remove at least one of
every type of glazing lite from each laboratory mockup and replace them using reglazing
procedures required for in-use skylight assembly.
Notify Architect seven days in advance of the dates and times when laboratory mockups
will be constructed.
Preconstruction Testing Sequence: Test laboratory mockups according to AAMA 501,
using the following sequence of tests:
a.
b.
c.
d.
e.
f.
g.
h.
G.
Structural-performance preloading at one-half of the specified maximum test load
(ASTM E 330).
Air infiltration (ASTM E 283).
Water penetration under static pressure (ASTM E 331).
Water penetration under dynamic pressure (AAMA 501.1).
Structural performance at design load (ASTM E 330).
Repeat air filtration (ASTM E 283).
Repeat water penetration under static pressure (ASTM E 331).
Structural performance at specified maximum test load (ASTM E 330).
Mockups: Build mockups to verify selections made under sample submittals and to demonstrate
aesthetic effects and set quality standards for fabrication and installation.
1.
Build mockup of typical metal-framed skylights as shown on Drawings.
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2.
3.
H.
1.6
Approval of mockups does not constitute approval of deviations from the Contract
Documents contained in mockups unless Architect specifically approves such deviations
in writing.
Approved mockups may become part of the completed Work if undisturbed at time of
Substantial Completion.
Preinstallation Conference: Conduct conference at [Project site] <Insert location>.
WARRANTY
A.
Special Warranty: Manufacturer's standard form in which manufacturer agrees to repair or
replace components of metal-framed skylights that fail in materials or workmanship within
specified warranty period.
1.
Failures include, but are not limited to, the following:
a.
b.
c.
d.
e.
2.
B.
Structural failures including, but not limited to, excessive deflection.
Noise or vibration caused by thermal movements.
Deterioration of metals[, metal finishes,] and other materials beyond normal
weathering.
Adhesive or cohesive sealant failures.
Water leakage.
Warranty Period: [Two] [Five] [10] <Insert number> years from date of Substantial
Completion.
Special Finish Warranty: Manufacturer's standard form in which manufacturer agrees to repair
or replace components on which finishes fail within specified warranty period. Warranty does
not include normal weathering.
1.
2.
Failures include, but are not limited to, checking, crazing, peeling, chalking, and fading
of finishes.
Warranty Period: [Five] [10] [20] <Insert number> years from date of Substantial
Completion.
PART 2 - PRODUCTS
2.1
MANUFACTURERS
A.
Basis-of-Design Product: Subject to compliance with requirements, provide Bristolite
Daylighting Systems, Inc.; Custom Metal Framed Skylight or comparable product by one of the
following:
1.
2.
3.
4.
Acralight International Skylights.
Architectural Glazing Technologies.
CPI Daylighting, Inc.
Exarc Skylights, Inc.
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5.
6.
7.
8.
9.
10.
2.2
Kawneer North America; an Alcoa company.
Major Industries, Inc.; Auburn Skylights Division.
Schuco USA, LP.
Super Sky Products, Inc.
J. Sussman, Inc.
<Insert manufacturer's name>.
PERFORMANCE REQUIREMENTS
A.
General: Metal-framed skylights shall withstand the effects of the following without failure due
to defective manufacture, fabrication, installation, or other defects in construction:
1.
2.
3.
4.
5.
Structural loads.
Thermal movements.
Movements of supporting structure.
Dimensional tolerances of support system and other adjacent construction.
Failure includes, but is not limited to, the following:
a.
b.
c.
d.
e.
f.
g.
Deflection exceeding specified limits.
Thermal stresses transferring to building structure.
Framing members transferring stresses, including those caused by thermal and
structural movements to glazing.
Glazing-to-glazing contact.
Noise or vibration created by wind and by thermal and structural movements.
Loosening or weakening of fasteners, attachments, and other components.
Sealant failure.
B.
Delegated Design: Design metal-framed skylights, including comprehensive engineering
analysis by a qualified professional engineer, using performance requirements and design
criteria indicated.
C.
Structural Loads:
1.
Wind Loads:[ As indicated on Drawings.]
a.
b.
c.
2.
D.
Basic Wind Speed: [85 mph (38 m/s)] [90 mph (40 m/s)] [100 mph (44 m/s)]
[110 mph (49 m/s)] <Insert value>.
Importance Factor: <Insert factor>.
Exposure Category: [A] [B] [C] [D].
Seismic Loads: [As indicated on Drawings] <Insert loads>.
Deflection of Framing Members: At design wind pressure, as follows:
1.
Deflection Normal to Glazing Plane: Limited to [edge of glass in a direction
perpendicular to glass plane not exceeding L/175 of the glass edge length for each
individual glazing lite] [1/175 of clear span for spans up to 13 feet 6 inches (4.1 m)
and to 1/240 of clear span plus 1/4 inch (6.35 mm) for spans more than 13 feet 6
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2.
inches (4.1 m)] <Insert deflection limit> or an amount that restricts edge deflection of
individual glazing lites to 3/4 inch (19.1 mm), whichever is less.
Deflection Parallel to Glazing Plane: Limited to [L/360 of clear span or 1/8 inch (3.2
mm), whichever is smaller] [amount not exceeding that which reduces glazing bite
to less than 75 percent of design dimension and that which reduces edge clearance
between framing members and glazing or other fixed components to less than 1/8
inch (3.2 mm)] <Insert deflection limit>.
E.
Lateral Bracing of Framing Members: Compression flanges of flexural members are laterally
braced by cross members with minimum depth equal to 50 percent of flexural member that is
braced. Glazing does not provide lateral support.
F.
Structural-Test Performance: Provide metal-framed skylights tested according to ASTM E 330,
as follows:
1.
2.
3.
G.
When tested at positive and negative wind-load design pressures, assemblies do not
evidence deflection exceeding specified limits.
When tested at [150] <Insert number> percent of positive and negative wind-load
design pressures, assemblies, including anchorage, do not evidence material failures,
structural distress, and permanent deformation of main framing members exceeding [0.2]
<Insert number> percent of span.
Test Durations: As required by design wind velocity, but not less than [10] <Insert
number> seconds.
Windborne-Debris-Impact-Resistance Performance: Provide metal-framed skylights that pass
missile-impact and cyclic-pressure tests when tested according to ASTM E 1886 and testing
information in ASTM E 1996 for Wind [Zone 1] [Zone 2] [Zone 3] [Zone 4].
1.
2.
Large-Missile Test: For glazed openings located within 30 feet (9.1 m) of grade.
Small-Missile Test: For glazed openings located more than 30 feet (9.1 m) above grade.
H.
Air Infiltration: Provide metal-framed skylights with maximum air leakage through fixed
glazing and framing areas of [0.06 cfm/sq. ft. (0.03 L/s per sq. m)] <Insert value> of fixed
wall area when tested according to ASTM E 283 at a minimum static-air-pressure difference of
[1.57 lbf/sq. ft. (75 Pa)] [6.24 lbf/sq. ft. (300 Pa)] <Insert value>.
I.
Water Penetration under Static Pressure: Provide metal-framed skylights that do not evidence
water penetration through fixed glazing and framing areas when tested according to
ASTM E 331 at a minimum static-air-pressure difference of 20 percent of positive wind-load
design pressure, but not less than [6.24 lbf/sq. ft. (300 Pa)] <Insert value>.
J.
Water Penetration under Dynamic Pressure: Provide metal-framed skylights that do not
evidence water leakage through fixed glazing and framing areas when tested according to
AAMA 501.1 under dynamic pressure equal to 20 percent of positive wind-load design
pressure, but not less than [6.24 lbf/sq. ft. (300 Pa)] <Insert value>.
1.
Maximum Water Leakage: [According to AAMA 501.1] [No uncontrolled water
penetrating aluminum-framed systems or water appearing on systems' normally
exposed interior surfaces from sources other than condensation]. Water leakage does
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not include water controlled by flashing and gutters that is drained to exterior and water
that cannot damage adjacent materials or finishes.
K.
Thermal Movements: Provide metal-framed skylights that allow for thermal movements
resulting from the following maximum change (range) in ambient and surface temperatures.
Base engineering calculations on surface temperatures of materials due to both solar heat gain
and nighttime-sky heat loss.
1.
Temperature Change (Range): [120 deg F (67 deg C), ambient; 180 deg F (100 deg C)]
<Insert temperature range>, material surfaces.
L.
Condensation Resistance: Provide metal-framed skylights with fixed glazing and framing areas
having condensation-resistance factor (CRF) of not less than [45] [53] <Insert number> when
tested according to AAMA 1503.
M.
Structural Sealant: Capable of withstanding tensile and shear stresses imposed without failing
adhesively or cohesively. When tested for preconstruction adhesion and compatibility, cohesive
failure of sealant shall occur before adhesive failure.
N.
Energy Performance: Provide metal-framed skylights with performance properties specified, as
indicated in manufacturer's published test data, based on procedures indicated below[ and
certified and labeled according to NFRC]:
1.
2.
2.3
Thermal Transmittance (U-Factor): Fixed glazing and framing areas shall have U-factor
of not more than [0.80 Btu/sq. ft. x h x deg F (4.54 W/sq. m x K)] [0.65 Btu/sq. ft. x h x
deg F (3.69 W/sq. m x K)] <Insert value> as determined according to NFRC 100.
Solar Heat Gain Coefficient: Fixed glazing and framing areas shall have a solar heat gain
coefficient of no greater than [0.6] [0.7] <Insert value> as determined according to
NFRC 200.
FRAMING SYSTEMS
A.
Aluminum: Alloy and temper recommended in writing by manufacturer for type of use and
finish indicated.
1.
2.
3.
4.
5.
B.
Pressure Caps: Manufacturer's standard aluminum components that mechanically retain glazing.
1.
C.
Sheet and Plate: ASTM B 209 (ASTM B 209M).
Extruded Bars, Rods, Profiles, and Tubes: ASTM B 221 (ASTM B 221M).
Extruded Structural Pipe and Tubes: ASTM B 429/B 429M.
Structural Profiles: ASTM B 308/B 308M.
Welding Rods and Bare Electrodes: AWS A5.10/A5.10M.
Include snap-on aluminum trim that conceals fasteners.
Brackets and Reinforcements: Manufacturer's standard high-strength aluminum with
nonstaining, nonferrous shims for aligning skylight components.
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D.
Fasteners and Accessories: Manufacturer's standard, corrosion-resistant, nonstaining,
nonbleeding fasteners and accessories compatible with adjacent materials.
1.
2.
3.
4.
At pressure caps, use ASTM A 193/A 193M stainless-steel screws.
Use self-locking devices where fasteners are subject to loosening or turning out from
thermal and structural movements, wind loads, or vibration.
Reinforce members as required to receive fastener threads.
Use exposed fasteners with countersunk Phillips screw heads[, finished to match
framing system] [, fabricated from Series 300 stainless steel].
E.
Concrete and Masonry Inserts: Hot-dip galvanized cast-iron, malleable-iron, or steel inserts
complying with ASTM A 123/A 123M or ASTM A 153/A 153M requirements.
F.
Anchor Bolts: ASTM A 307, Grade A (ASTM F 568M, Property Class 4.6), galvanized steel.
G.
Concealed Flashing: [Manufacturer's standard, corrosion-resistant, nonstaining,
nonbleeding flashing compatible with adjacent materials] [Dead-soft, 0.018-inch- (0.457mm-) thick stainless steel, ASTM A 240/A 240M of type recommended in writing by
manufacturer].
H.
Exposed Flashing and Closures: Manufacturer's standard aluminum components not less than
[0.030 inch (0.762 mm)] [0.040 inch (1.016 mm)] [0.060 inch (1.524 mm)] <Insert
dimension> thick.
I.
Framing Gaskets: [Manufacturer's standard] <Insert requirements>.
J.
Framing Sealants: As [recommended in writing by manufacturer.] [specified in
Section 079200 "Joint Sealants."]
1.
2.
K.
2.4
Sealants used inside the weatherproofing system shall have a VOC content of [250]
<Insert value> g/L or less when calculated according to 40 CFR 59, Subpart D (EPA
Method 24).
Sealants used inside the weatherproofing system shall comply with the testing and
product requirements of the California Department of Health Services' "Standard Practice
for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale
Environmental Chambers."
Corrosion-Resistant Coating: Cold-applied asphalt mastic, compounded for 15-mil (0.4-mm)
dry film thickness per coat. Provide inert-type noncorrosive compound free of asbestos fibers,
sulfur components, and other deleterious impurities.
GLAZING
A.
Glazing: As specified in [Section 088000 "Glazing."] [Section 088400 "Plastic Glazing."]
B.
Spacers, Setting Blocks, and Gaskets: [Manufacturer's standard elastomeric types.] [As
specified in Section 088000 "Glazing."] [As specified in Section 088400 "Plastic Glazing."]
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C.
Bond-Breaker Tape: [Manufacturer's standard tetrafluoroethylene-fluorocarbon or
polyethylene material to which sealants will not develop adhesion] <Insert requirements>.
D.
Glazing Sealants: As [recommended in writing by manufacturer.] [specified in
Section 079200 "Joint Sealants."]
1.
2.
3.
Sealants used inside the weatherproofing system shall have a VOC content as indicated
when calculated according to 40 CFR 59, Subpart D (EPA Method 24).
Sealants used inside the weatherproofing system shall comply with the testing and
product requirements of the California Department of Health Services' "Standard Practice
for the Testing of Volatile Organic Emissions from Various Sources Using Small-Scale
Environmental Chambers."
Structural Sealant: ASTM C 1184, neutral-curing silicone formulation compatible with
system components with which it comes in contact, specifically formulated and tested for
use as structural sealant, and approved by structural-sealant manufacturer for use in
metal-framed skylights indicated.
a.
b.
4.
Weatherseal Sealant: ASTM C 920 for Type S, Grade NS, Class 25, Uses NT, G, A, and
O; neutral-curing silicone formulation compatible with structural sealant and other
components with which it comes in contact; and recommended in writing by structuraland weatherseal-sealant and metal-framed skylight manufacturers for this use.
a.
b.
2.5
VOC Content: [100] <Insert value> g/L or less.
Color: [Black] [As selected by Architect from manufacturer's full range].
VOC Content: [250] <Insert value> g/L or less.
Color: Matching structural sealant.
FABRICATION
A.
Where practical, fit and assemble metal-framed skylights in manufacturer's plant. To ensure
proper assembly at Project site, clearly identify work that cannot be permanently factory
assembled before shipment.
B.
Fabricate aluminum components before finishing.
C.
Fabricate aluminum components that, when assembled, have the following characteristics:
1.
2.
3.
4.
5.
Profiles that are sharp, straight, and free of defects or deformations.
Accurately fitted joints with ends coped or mitered.
Internal guttering systems or other means to drain water passing joints, condensation
occurring within framing members, and moisture migrating within skylight to exterior.
Physical and thermal isolation of glazing from framing members.
Accommodations for thermal and mechanical movements of glazing and framing to
maintain required glazing edge clearances.
D.
Fabricate aluminum sill closures with weep holes and for installation as continuous component.
E.
Reinforce aluminum components as required to receive fastener threads.
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F.
Weld aluminum components in concealed locations to greatest extent possible to minimize
distortion or discoloration of finish. Remove weld spatter and welding oxides from exposed
surfaces by descaling or grinding.
G.
Factory-Glazed, Metal-Framed Skylights:
1.
2.
H.
2.6
Factory install glazing to comply with requirements in [Section 088000 "Glazing."]
[Section 088400 "Plastic Glazing."]
Prepare surfaces that will contact structural sealant according to structural-sealant
manufacturer's written instructions to ensure compatibility and adhesion. Preparation
includes, but is not limited to, cleaning and priming surfaces.
After fabrication, clearly mark components to identify their locations in Project according to
Shop Drawings.
ALUMINUM FINISHES
A.
Clear Anodic Finish: AAMA 611, [AA-M12C22A41, Class I, 0.018 mm] [AA-M12C22A31,
Class II, 0.010 mm] or thicker.
B.
Color Anodic Finish: AAMA 611, [AA-M12C22A42/A44, Class I, 0.018 mm] [AAM12C22A32/A34, Class II, 0.010 mm] or thicker.
1.
2.
C.
Baked-Enamel or Powder-Coat Finish: AAMA 2603 except with a minimum dry film thickness
of 1.5 mils (0.04 mm). Comply with coating manufacturer's written instructions for cleaning,
conversion coating, and applying and baking finish.
1.
D.
Color and Gloss: [As indicated by manufacturer's designations] [Match Architect's
sample] [As selected by Architect from manufacturer's full range] <Insert color and
gloss>.
High-Performance Organic Finish: Two-coat fluoropolymer finish complying with
[AAMA 2604] [AAMA 2605] and containing not less than [50] [70] percent PVDF resin by
weight in color coat. Prepare, pretreat, and apply coating to exposed metal surfaces to comply
with coating and resin manufacturers' written instructions.
1.
E.
Color: [Light bronze] [Medium bronze] [Dark bronze] [Champagne] [Black] <Insert
color>.
Color: [Match Architect's sample] [As selected by Architect from full range of
industry colors and color densities].
Color and Gloss: [As indicated by manufacturer's designations] [Match Architect's
sample] [As selected by Architect from manufacturer's full range] <Insert color and
gloss>.
High-Performance Organic Finish: [Three] [Four]-coat fluoropolymer finish complying with
AAMA 2605 and containing not less than [50] [70] percent 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.
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1.
2.7
Color and Gloss: [As indicated by manufacturer's designations] [Match Architect's
sample] [As selected by Architect from manufacturer's full range] <Insert color and
gloss>.
SOURCE QUALITY CONTROL
A.
Structural-Sealant Glazing: Perform quality-control procedures complying with ASTM C 1401
recommendations including, but not limited to, material qualification procedures, sealant
testing, and fabrication reviews and checks.
PART 3 - EXECUTION
3.1
EXAMINATION
A.
Examine areas and conditions, with Installer present, for compliance with requirements for
installation tolerances and other conditions affecting performance of the Work.
B.
Proceed with installation only after unsatisfactory conditions have been corrected.
3.2
INSTALLATION
A.
General:
1.
2.
3.
4.
5.
6.
7.
Comply with manufacturer's written instructions.
Do not install damaged components.
Fit joints between aluminum components to produce hairline joints free of burrs and
distortion.
Rigidly secure nonmovement joints.
Install anchors with separators and isolators to prevent metal corrosion and electrolytic
deterioration and to prevent impeding movement of moving joints.
Weld components in concealed locations to minimize distortion or discoloration of finish.
Protect glazing surfaces from welding.
Seal joints watertight unless otherwise indicated.
B.
Metal Protection: Where aluminum will contact dissimilar materials, protect against galvanic
action by painting contact surfaces with protective coating or by installing nonconductive
spacers as recommended in writing by manufacturer for this purpose.
C.
Install continuous aluminum sill closure with weatherproof expansion joints and locked and
sealed or welded corners. Locate weep holes at rafters.
D.
Install components to drain water passing joints, condensation occurring within framing
members, and moisture migrating within skylight to exterior.
E.
Install components plumb and true in alignment with established lines and elevations.
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F.
Install glazing as specified in [Section 088000 "Glazing."] [Section 088400 "Plastic
Glazing."]
1.
Structural-Sealant Glazing:
a.
b.
G.
Erection Tolerances: Install metal-framed skylights to comply with the following maximum
tolerances:
1.
2.
3.3
Prepare surfaces that will contact structural sealant according to structural-sealant
manufacturer's written instructions to ensure compatibility and adhesion.
Preparation includes, but is not limited to, cleaning and priming surfaces.
Install weatherseal sealant according to Section 079200 "Joint Sealants" and
according to weatherseal-sealant manufacturer's written instructions to produce
weatherproof joints. Install joint filler behind weatherseal sealant as recommended
in writing by weatherseal-sealant manufacturer.
Alignment: Limit offset from true alignment to 1/32 inch (0.8 mm) where surfaces abut
in line, edge to edge, at corners, or where a reveal or protruding element separates aligned
surfaces by less than 3 inches (76 mm); otherwise, limit offset to 1/8 inch (3.2 mm).
Location and Plane: Limit variation from true location and plane to 1/8 inch in 12 feet
(3.2 mm in 3.7 m) but no greater than 1/2 inch (13 mm) over total length.
FIELD QUALITY CONTROL
A.
Testing Agency: [Owner will engage] [Engage] a qualified testing agency to perform tests and
inspections.
1.
2.
Water-Spray Test: Before installation of interior finishes has begun, skylights shall be
tested according to AAMA 501.2 and shall not evidence water penetration.
Water Penetration under Static Pressure: Before installation of interior finishes has
begun, areas shall be tested according to ASTM E 1105.
a.
b.
c.
3.
Test Procedures: Test under [uniform] [and] [cyclic] static-air pressure.
Static-Air-Pressure Difference: <Insert pressure>.
Water Penetration: None.
Structural-Sealant Compatibility and Adhesion: Structural sealant shall be tested
according to recommendations in ASTM C 1401.
a.
Destructive test method, Method A, Hand
ASTM C 1401, Appendix X2, shall be used.
1)
2)
4.
Pull
Tab
(Destructive)
in
A minimum of [one] [two] <Insert number> area(s) on each skylight face
shall be tested.
Repair installation areas damaged by testing.
Structural-Sealant Glazing Inspection: After installation of metal-framed skylights is
complete, structural-sealant glazing shall be inspected and evaluated according to
ASTM C 1401 recommendations for quality-control procedures.
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B.
Repair or remove work where test results and inspections indicate that it does not comply with
specified requirements.
C.
Additional testing and inspecting, at Contractor's expense, will be performed to determine
compliance of replaced or additional work with specified requirements.
D.
Prepare test and inspection reports.
END OF SECTION 086300
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