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SECTION 08630
METAL-FRAMED SKYLIGHTS
NOTE ** Naturalite BMS 3000 skylights, for flat glass,
plastic glazing or metal panel infill.
NOTE **
NOTE ** This section is based on products manufactured by
Naturalite Skylight Systems, Butler Manufacturing
Company, which is located at:
NOTE ** 803 Airport Road
NOTE ** P.O.Box 629
NOTE ** Terrell, TX 75160
NOTE ** Tel: (800) 259-7941
NOTE ** Fax: (972) 551-6129
NOTE **
NOTE ** Naturalite provides complete design, engineering,
fabrication, finishing, and installation services
for skylights of any size or complexity.
NOTE **
NOTE ** SECTION 08630 - METAL-FRAMED SKYLIGHTS, The
Architect's Catalog, Inc.
PART 1 GENERAL
1.1 SECTION INCLUDES
NOTE ** Delete any products or work not required for this
project.
A. Removal and disposal of existing skylight, to make way
for new skylight.
B. Metal-framed skylights and their glazing.
C. Motor-operators for skylights.
1.2 RELATED SECTIONS
NOTE ** Delete any sections below not relevant to this
project; add others as required.
A. Section 05120 - Structural Steel: Structural supports
for skylights.
B. Section 05162 - Space Frames: Structural supports for
skylights.
C. Section 07620 - Sheet Metal Flashing and Trim.
D. Section 08900 - Glazed Curtain Walls.
E. Section 12500 - Window Treatment: Anchors and brackets
for window treatments attached to skylights.
1.3 REFERENCES
NOTE ** Delete references from the list below that are not
actually required by the text of the edited
section.
A. AA - Aluminum Design Manual; The Aluminum Association.
B. AAMA 501.1 - Standard Test Method for Metal Curtain Walls
for Water Penetration Using Dynamic Pressure; part of
AAMA 501; American Architectural Manufacturers
Association.
C. AAMA 603.8 - Voluntary Performance Requirements and Test
Procedures for Pigmented Organic Coatings on Extruded
Aluminum; American Architectural Manufacturers
Association.
D. AAMA 605.2 - Specification for High Performance Organic
Coatings on Architectural Extrusions and Panels; American
Architectural Manufacturers Association.
E. AAMA 606.1 - Voluntary Guide Specifications and
Inspection Methods for Integral Color Anodic Finishes for
Architectural Aluminum; American Architectural
Manufacturers Association.
F. AAMA 607.1 - Voluntary Guide Specification and Inspection
Methods for Clear Anodic Finishes for Architectural
Aluminum; American Architectural Manufacturers
Association.
G. AAMA GDSG-1 - Glass Design for Sloped Glazing; American
Architectural Manufacturers Association.
H. AAMA SDGS-1 - Structural Design Guidelines for Aluminum
Framed Skylights; American Architectural Manufacturers
Association.
I. AAMA TSGG-90 - Two-Sided Structural Glazing Guidelines
for Aluminum Framed Skylights; American Architectural
Manufacturers Association.
J. ASTM C 509 - Standard Specification for Elastomeric
Cellular Preformed Gasket and Sealing Material.
K. ASTM C 794 - Standard Test Method for Adhesion-in-Peel of
Elastomeric Joint Sealants.
L. ASTM C 864 - Standard Specification for Dense Elastomeric
Compression Seal Gaskets, Setting Blocks and Spacers.
M. ASTM C 1036 - Standard Specification for Flat Glass.
N. ASTM C 1048 - Standard Specification for Heat-Treated
Flat Glass--Kind HS, Kind FT Coated and Uncoated Glass.
O. ASTM D 1149 - Standard Test Method for Rubber
Deterioration--Surface Ozone Cracking in a Chamber.
P. ASTM E 283 - Standard Test Method for Determining the
Rate of Air Leakage Through Exterior Windows, Curtain
Walls and Doors Under Specified Pressure Differences
Across the Specimen.
Q. ASTM E 331 - Standard Test Method for Water Penetration
of Exterior Windows, Curtain Walls and Doors by Uniform
Static Air Pressure Difference.
R. ASTM E 773 - Standard Test Methods for Seal Durability of
Sealed Insulating Glass Units.
S. ASTM E 774 - Standard Specification for Sealed Insulating
Glass Units.
T. FGMA Glazing Manual; Glass Association of North America.
U. IGCC Certified Products Directory; Insulating Glass
Certification Council.
1.4 SUBMITTALS
A. Submit under provisions of Section 01300.
B. Product Data: Manufacturer's descriptive literature,
specifications, and installation instructions.
C. Test Reports: Show compliance with specified performance
requirements.
D. Shop Drawings: Prepare specifically for this project.
Include:
1. Detailed plans and elevations, details of framing
members, glazing materials, sealants, fasteners,
anchors.
2. Types and thicknesses of formed flashing and
closures.
3. Interface with adjacent construction.
4. Horizontal and vertical forces at rafters.
NOTE ** Delete the following paragraph if colors are
completely specified or indicated on the drawings.
E. Selection Samples: Two sets of color charts or samples,
for selection of colors of finishes, glazing, and
sealants.
F. Glazing Samples: Two pieces, 12 inches (300 mm) square,
of glazing in specified color, pattern, and coating, for
verification.
G. Metal Finish Samples: Two pieces of aluminum with
specified finish and color, for verification.
NOTE ** Delete the following paragraph if no structural
silicone sealant is required.
H. Certification for Structural Sealant: Written
documentation from sealant manufacturer:
1. Statement that the sealant selected has been tested
for adhesion and compatibility on representative
samples of metal, glass and other glazing components.
2. Statement that the sealant joint design and
application procedures shown on the shop drawings are
suitable for this project.
3. List of recommended cleaning methods and priming
recommendations.
4. Results of adhesion tests for sealants proposed for
use on the project.
1.5 QUALITY ASSURANCE
A. Manufacturer Qualifications: Minimum of 10 years
experience in the fabrication and installation of similar
products.
NOTE ** The skylight manufacturer should install complex,
monumental, and four-sided structurally-glazed
skylights. That way, although the manufacturer may
elect to subcontract the installation work, the
ultimate responsibility for the entire skylight and
the warranty remain the manufacturer's. Edit the
following paragraph if other not required.
B. Installer Qualifications: The manufacturer of the
skylight or his authorized representative.
C. Pre-Installation Meeting: Convene just prior to start of
site operations.
1. Require attendance of installer and installation
personnel.
2. Cover procedures required to maintain proper working
conditions, to coordinate with other work, and to
protect roofing and flashings as required by roofing
manufacturer.
1.6 DELIVERY, STORAGE, AND HANDLING
A. Arrange deliveries to avoid delays but to minimize on-
site storage.
B. Deliver products in labelled protective packages.
C. Deliver, handle, and store in strict compliance with
manufacturer's instructions and recommendations.
1.7 WARRANTY
A. Skylight Warranty: Provide written warranty signed by
manufacturer that products are free of defects in
material and workmanship. Include repair or replacement
of work for five years from date of completion. Defects
are defined to include uncontrolled leakage of water and
abnormal aging or deterioration.
NOTE ** Delete the following paragraph if fluoropolymer
finish is not specified. Anodized and baked enamel
finishes are normally covered by the standard one-
year warranty, but additional coverage may be
available pending manufacturer review of geographic
location and at additional cost.
B. Fluoropolymer Finish Warranty: Provide written warranty
signed by manufacturer and finisher that finish is free
of defects in material and workmanship. Include repair
or replacement of work which exhibits defects for five
years from date of completion. Defects are defined to
include peeling, chipping, chalking, fading, abnormal
aging or deterioration, and failure to perform as
required.
C. Glazing Warranty: Provide written warranty signed by
manufacturer that glazing is free of defects in material
and workmanship. Include repair or replacement of work
which exhibits defects for five years from date of
manufacture. Defects are defined to include
delamination, seal failure, and deterioration of film
coatings.
1.8 EXTRA MATERIALS
NOTE ** Delete the following paragraph if not required.
Extra material ("attic stock") is intended as a
small quantity on hand for the most common sizes
and shapes of glass used on the project. This is
especially useful for special tints or coatings
because there may be very long lead times (14 to 16
weeks) to manufacture these special items. Non-
typical or odd-size units are not usually included,
since the cost is high compared to the likelihood
they will be needed.
NOTE **
NOTE ** Some owners, such as government agencies, may not
be able to include extra materials in the
construction budget.
A. Extra Materials: If 50 or more glazing units of the
exact same size are required, provide 1 percent, or a
minimum of 1 unit, for Owner's use; pack in sturdy
containers, label, and store in the area designated by
the Owner.
PART 2 PRODUCTS
2.1 MANUFACTURERS
A. Provide products made by Naturalite Skylight Systems,
Butler Manufacturing Company, P.O.Box 629, 750 Airport
Road, Terrell, TX 75160. ASD. Tel: (800) 527-4018. Fax:
(972) 551-6420.
NOTE ** Delete one of the two following paragraphs;
coordinate with Division 1 requirements. If other
manufacturers must be listed, Super Sky Products
Inc. and Fisher Skylights may manufacture products
of equivalent performance.
B. Requests for substitution will be considered in
accordance with provisions of Section 01600.
C. Substitutions: Not permitted.
D. For manufacturers not listed, submit evidence of ability
to provide products that meet both performance and
product requirements, including list of projects of
similar design and complexity completed within the last 5
years.
E. Provide primary materials that are made by a single
manufacturer.
2.2 METAL-FRAMED SKYLIGHTS
A. Metal-Framed Skylights - Performance Requirements:
NOTE ** Delete the following paragraph if not required.
This paragraph requires that the skylight be of a
configuration, or be stiff enough, to exert only
vertical forces -- considerably more expensive than
otherwise. If this "non-thrusting" design is
required, contact Naturalite early in the design
phase -- some configurations can be designed to be
"non-thrusting", others cannot.
1. Design framing system to exert no horizontal forces
on supporting structure.
2. Design to withstand the following:
NOTE ** Loads must be determined for each project, based on
local code, location, and building configuration.
Refer also to AAMA Structural Design Guidelines for
Aluminum Framed Skylights for information on design
loadings and deflection considerations.
a. Snow load: ___ psf (___ kPa) snow load.
b. Wind load: ___ psf (___ kPa) positive and ___
psf (___ kPa) negative.
c. Dead loads.
d. Concentrated live load: 250 pounds (113 kg)
applied to any framing member at a location that
will produce the most severe stress or
deflection.
NOTE ** Delete one of the following two paragraphs. The
first is for use if the skylight is part of a
heated enclosure; the second is for an unheated
enclosure.
e. Temperature range: 70 degrees F (39 degrees C)
above and below ambient temperature.
f. Temperature range: 50 degrees F (28 degrees C)
above and below ambient temperature.
NOTE ** Be sure to check state and local building codes for
allowable frame deflections. Some codes include
skylight framing members under the requirements for
roof structural members, which might require less
deflection.
3. Deflection of Any Glazing Support Member Under Load:
Not more than 1/180 of the unsupported span.
4. Air Infiltration: Not more than 0.06 cfm per sq ft
(1.1 cu m/h per sq m) of glazed surface area, when
tested in accordance with ASTM E 283 at a static
pressure differential of 6.24 psf (3.0 kPa).
5. Water Penetration: No uncontrolled water leakage,
when tested in accordance with ASTM E 331 at a static
pressure differential of 12 psf (5.7 kPa).
6. Water Penetration: No uncontrolled water leakage,
when tested in accordance with AAMA 501.1 at a static
pressure differential of 12 psf (5.7 kPa).
B. Metal-Framed Skylights: Naturalite BMS 3000 system;
aluminum framing system with glazing, manufacturer-
engineered and factory-fabricated, complete with all
glazing accessories, flashings, connections, and anchors.
NOTE ** Delete all but one of the following three
paragraphs.
1. Glazing Method: Cap glazing.
2. Glazing Method: Two sides structural silicone
glazing; other two sides cap glazing.
3. Glazing Method: Four sides structural silicone
glazing.
NOTE ** Delete the following if not required. Be sure that
the drawings clearly indicated which steel members
are to be engineered and furnished by the skylight
manufacturer (and not by the structural steel
fabricator).
4. Include steel structural members indicated on
drawings as part of the skylight system.
5. Fabricate to actual dimensions of constructed work
where possible; otherwise, allow for field adjustment
using trim or flashing of adjustable size or
configuration.
6. Fabricate work straight, plumb, level and square, of
sizes, shapes, and profiles indicated on approved
shop drawings, with uniform, tight joints.
NOTE ** Delete all but one of the following three
paragraphs. Naturalite recommends fluoropolymer
coating for exterior surfaces due to its excellent
weathering and chemical resistance. Fluoropolymer
is more expensive than anodizing and some colors
cost more than others -- if color is not specified,
bidders usually include only "non-exotic" colors.
7. Exterior Aluminum Finish: Clear anodized.
8. Exterior Aluminum Finish: Color anodized.
9. Exterior Aluminum Finish: Fluoropolymer coating.
NOTE ** If clear anodizing is specified delete all of the
following six paragraphs. Otherwise, select one
and delete the others.
10. Color: Medium bronze.
11. Color: Dark bronze.
12. Color: Black.
13. Color: As selected from manufacturer's standard
colors.
14. Color: Custom color to match Architect's sample.
15. Color: _______.
NOTE ** Delete all but one of the following five
paragraphs.
16. Interior Aluminum Finish: Same as exterior finish.
17. Interior Aluminum Finish: Clear anodized.
18. Interior Aluminum Finish: Color anodized.
19. Interior Aluminum Finish: Baked enamel coating.
20. Interior Aluminum Finish: Fluoropolymer coating.
NOTE ** If clear anodizing is specified delete all of the
following six paragraphs. Otherwise, select one
and delete the others. It is highly recommended
that colors be specified or indicated on the
drawings -- color required affects the cost of all
these finishes. Non-standard or "exotic" colors
significantly affect the cost of coated finishes.
Refer to manufacturer's catalog data for colors
available.
21. Color: Medium bronze.
22. Color: Dark bronze.
23. Color: Black.
24. Color: As selected from manufacturer's standard
colors.
25. Color: Custom color to match Architect's sample.
26. Color: _______.
C. Framing Members: Extruded aluminum, 6063-T5, 6063-T6, or
6061-T6 alloy and temper, as recommended by the
manufacturer for design loading, cross-sectional
configuration, fabrication requirements and finish
required.
NOTE ** Delete one of the following two paragraphs.
Tubular framing is the most common because it is
most efficient structurally and it allows for
concealed condensation gutters, keeping the members
free of drips and streaking. I-beam and "skin-
type" framing (used with separate structure) are
also available.
1. Provide tubular rafter and purlin framing members.
2. Provide _______-shaped rafter and purlin framing
members.
3. Design to collect and channel condensation and water
infiltration to the exterior through weep holes or
drain tubes in the sill or perimeter framing members.
4. Design condensation gutters so they are concealed and
flush with framing.
5. Reinforce butt, mitered, and splice joints with
internal aluminum splice plates where possible;
mechanically fastened with stainless steel truss head
fasteners in accordance with manufacturer's standard
connection details.
6. Include a positive stop to control compression in the
glazing rabbet.
NOTE ** Delete any of the following glazing methods that
are not required.
7. Cap Glazing: Glazing caps mechanically secured with
thermally broken glazing clips at purlins and sills;
sealed at corner intersections.
NOTE ** Delete the following paragraph if not required.
8. Cap Glazing: Provide a full perimeter exterior wet
seal.
9. Two-Sided Structural Silicone Glazing: Two sides of
glazing retained with glazing caps mechanically
secured with thermally insulated glazing clips; two
remaining sides secured to continuous aluminum fin
using structural silicone glazing sealant in shear-
type joint design; comply with AAMA Two-Sided
Structural Glazing Guidelines for Aluminum Framed
Skylights.
10. Four-Sided Structural Silicone Glazing: Factory
glazed using perimeter frame secured to the inside
surface of the glazing using structural silicone
glazing sealant; mechanically fastened to the support
framing system with retainer clips spaced as required
to support design loads; design to allow for exterior
glazing replacement without disrupting adjacent
glazing.
11. Do not anchor sill members through integral secondary
gutter area on pitches less than 4 in 12 (1:3) from
horizontal.
12. Welding: Factory-performed heliarc welding with all
exposed welds finished to match adjacent material.
D. Formed Flashing and Closures: Aluminum sheet.
1. Anodized: Minimum 0.040 inch (1.0 mm) thick.
2. Coated Finish: Minimum 0.062 inch (1.6 mm) thick.
E. Anchors and Fasteners:
1. Not Exposed to Weather: Cadmium plated lag, sleeve
and stud bolt anchors.
2. Exposed to Weather: Stainless steel, 300 series.
3. Where bolted connections penetrate secondary gutter
of sill member: Same as if exposed to weather.
F. Finishes:
NOTE ** Delete one of the following two paragraphs if clear
anodizing is specified. The first paragraph is the
best quality clear anodizing available and should
be used on the exterior, while Class II is suitable
for interior applications.
1. Clear Anodizing: Class I, AA-M10C22A41 clear
anodized coating complying with AAMA 607.1, 0.7 mils
(0.018 mm) or thicker.
2. Clear Anodizing: Class II AA-M10C22A31 clear
anodized coating complying with AAMA 607.1, 0.4 to
0.7 mils (0.010 to 0.018 mm) thick.
3. Color Anodizing: Class I, AA-M10C22A44 anodized
coating electrolytically deposited complying with
AAMA 606.1, 0.7 mils (0.018 mm) or thicker.
4. Baked Enamel Coating: Polyester, complying with AAMA
603.8.
NOTE ** Delete all but one of the following two paragraphs
if fluoropolymer finish is required. For dark or
bright colors or metallic finish, consult with
finish manufacturer and specify actual color or
finish selected -- cost will vary.
5. Fluoropolymer Coating: Two coats 70 percent Kynar
500/Hylar 5000 resin base fluoropolymer finish
complying with AAMA 605.2.
6. Fluoropolymer Coating: Three coats 70 percent Kynar
500/Hylar 5000 resin base fluoropolymer finish
complying with AAMA 605.2.
7. Fluoropolymer Coating: Four coats 70 percent Kynar
500/Hylar 5000 resin base fluoropolymer finish
complying with AAMA 605.2.
2.3 GLAZING AND INFILL MATERIALS
NOTE ** The following are examples of ways to specify
glazing. Consult with glazing manufacturers.
Refer to AAMA Glass Design for Sloped Glazing for
design considerations. Naturalite can provide
assistance in selection of low-e and other coatings
for skylight applications. Most sloped glazing and
skylight applications require that the plies of
either monolithic or insulating units be heat-
strengthened. Do not use annealed laminated glass
with low-e or reflective coatings regardless of
which surface the coating is applied to.
A. Glazing: Glass as specified in Section 08800.
B. Glazing: Single; 1/2 inch (13 mm) laminated glass:
1. Outboard Ply: 1/4 inch (6 mm) clear heat-
strengthened glass.
NOTE ** Delete one of the following two paragraphs.
2. Interlayer: 0.030 inch (0.08 mm) clear polyvinyl
butyral (PVB) sheet.
3. Interlayer: 0.060 inch (1.5 mm) clear polyvinyl
butyral (PVB) sheet.
4. Inboard Ply: 1/4 inch (6 mm) clear heat-strengthened
glass.
C. Glazing: Sealed insulating units:
1. Exterior Lite: 1/4 inch (6 mm) clear heat-
strengthened glass.
2. Air space: 1/2 inch (12 mm).
3. Interior lite: Laminated glass:
NOTE ** Delete all but one of the following three
paragraphs. 1/8 inch plies result in a 1 inch
thick unit. 3/16 inch plies result in a 1-/8 inch
thick unit. 1/4 inch plies result in a 1-1/4 inch
thick unit.
a. 2 plies of 1/8 inch (3 mm) clear glass.
b. 2 plies of 3/16 inch (5 mm) clear glass.
c. 2 plies of 1/4 inch (6 mm) clear glass.
d. Heat-strengthened.
NOTE ** Delete one of the following two paragraphs.
e. Interlayer: 0.030 inch (0.8 mm) clear polyvinyl
butyral (PVB) sheet.
f. Interlayer: 0.060 inch (1.5 mm) clear polyvinyl
butyral (PVB) sheet.
D. Glazing: Plastic glazing sheet:
NOTE ** Delete one of the following two paragraphs.
1. Single glazed.
2. Double glazed.
NOTE ** Delete one of the following two paragraphs.
3. Glazing Sheet: Continuous cast acrylic sheet.
4. Glazing Sheet: Continuous cast polycarbonate sheet.
5. Thickness: As determined by skylight manufacturer.
6. Color: Selected by Architect from skylight
manufacturer's standard selection.
7. Color: ________.
NOTE ** The following glazing is for vertical applications
that may be associated with the skylight, such as
end walls, entrances, and vestibules. Doors and
sidelights usually must be safety glazing. Delete
any of the following paragraphs on vertical glazing
that are not required.
E. Glazing for Vertical Framing: Same as for skylight.
F. Glazing for Vertical Framing: Single glazing.
1. 1/4 inch (6 mm) thick clear glass.
NOTE ** Delete one of the following two paragraphs.
NOTE **
2. Heat-strengthened.
3. Fully tempered.
G. Glazing for Vertical Framing: Sealed insulating units:
NOTE ** Delete one of the following two paragraphs.
1. Exterior Lite: 1/4 inch (6 mm) clear heat-
strengthened glass.
2. Exterior Lite: 1/4 inch (6 mm) clear fully-tempered
glass.
3. Air space: 1/2 inch (12 mm).
NOTE ** Delete one of the following two paragraphs.
4. Interior Lite: 1/4 inch (6 mm) clear heat-
strengthened glass.
5. Interior Lite: 1/4 inch (6 mm) clear fully-tempered
glass.
NOTE ** Metal panels integral with skylight system should
be specified in this section. Do not exceed 60
inches in either length or width, due to
availability of coated sheet. Fluoropolymer
coating finish is the most common.
H. Insulated Panels: Flat, metal faced panels with
insulating core.
1. Face Sheets: Prefinished 0.040 inch (1.0 mm) thick
aluminum, alloy 5005-H34.
2. Core: Polyisocyanurate structural foam core with R-
value of 5.9 per inch (1.04 W/(m K)/M) thickness.
3. Thickness: Same as adjacent glazing unit.
4. Finish: Same as for framing.
NOTE ** Delete one of the following two paragraphs.
5. Color: Same as for framing.
6. Colors: Different from framing and different colors
are required for interior and exterior faces.
NOTE ** Delete the following paragraph if panels are not
installed in 2-sided structural silicone sealant
application.
7. Two-Sided Structural Silicone Glazing Applications:
Purlin edges with panned edges or 1/2 inch (12 mm)
returns as indicated on the Drawings.
I. Glass: Conform to applicable requirements of ASTM C 1036
and ASTM C 1048.
1. Determine glass strengths using AAMA Glass Design for
Sloped Glazing guidelines.
2. Glaze in accordance with FGMA Glazing Manual and
glass fabricator's guidelines.
NOTE ** Delete the following two paragraphs if sealed
insulating units are not used.
3. Sealed Insulating Units: Dual sealed with primary
seal of polyisobutylene and secondary seal of two-
part silicone equal to Dow Corning 982 or GE Silicone
4200.
4. Sealed Insulating Units: Class A rated when tested
in accordance with ASTM E 773 and ASTM E 774; IGCC
certified.
J. Gaskets: Provide continuous cushion below and continuous
spacer above glazing.
1. Ozone Resistance: Withstand one part per million
ozone for 500 hours at 20 percent elongation at 100
degrees F (38 degrees C) when tested in accordance
with ASTM D 1149.
NOTE ** Delete one of the following two paragraphs.
Silicone rubber gaskets are an additional cost.
2. Gaskets Below Glazing: Extruded, dense EPDM black
rubber, Shore A durometer of 60 plus or minus 5,
complying with ASTM C 864.
3. Gaskets Below Glazing: Extruded, silicone rubber,
Shore A hardness of 40 plus/minus 5 when tested in
accordance with ASTM C 1115.
4. Gaskets Above Glazing: Extruded, closed-cell, sponge
EPDM black rubber, complying with ASTM C 509.
K. Sealants: As required by skylight manufacturer.
1. Adhesion: Show adequate adhesion to samples of metal
and glass, when tested in accordance with ASTM C 794.
2. Exterior Metal-to-Glass Corner and Cap Seals: Black.
3. Exposed Metal-to-Metal Joints: Any standard color
silicone sealant.
NOTE ** Delete the following paragraph if neither 2-sided
nor 4-sided structural silicone glazing is used.
L. Structural Silicone Glazing Sealant: Type as required by
skylight manufacturer; compatible with all contact
components.
1. Insulating Glass Applications: Limit depth of
silicone joint to design thickness of exterior lite;
use temporary clips to secure purlin edge of unit in
place until sealant has fully cured.
2. Comply with AAMA Two-Sided Structural Glazing
Guidelines for Aluminum Framed Skylights for design
and field procedures.
2.4 ACCESSORIES
NOTE ** Delete the following paragraph if not required.
Motor-operated skylight applications require a
feasibility study by Naturalite early in the design
phase.
A. Operable Skylights: Include all components required to
make skylight operable, including steel track, support
brackets, mechanical drive system, electric motors, limit
switches, control panel, key operated switches and
accessories.
PART 3 EXECUTION
3.1 EXAMINATION
NOTE ** DRAWING COORDINATION: The drawings should indicate
the locations, types, and dimensions of the
skylight units, and show details of interface with
adjacent construction.
A. Take field measurements to verify that fabricated work
will fit spaces intended.
B. Verify that areas in which work is to be installed are
ready for installation and that supports are installed
correctly.
C. Do not proceed until unsatisfactory conditions have been
corrected.
3.2 PREPARATION
NOTE ** Delete the following paragraph if no demolition is
required.
A. Remove existing skylight and other components and prepare
for new construction. Do not overload adjacent
construction. Remove debris from site and dispose of
legally.
3.3 INSTALLATION
A. Install in strict accordance with manufacturer's
instructions and recommendations and with approved shop
drawings; provide a complete weatherproof assembly.
B. Anchor securely to supporting structure, but allow for
differential and thermal movement.
NOTE ** Delete the following paragraph if neither 2-sided
nor 4-sided structural silicone glazing is used.
C. Do not perform structural silicone sealant work when the
metal temperature is below 32 degrees F (0 degrees C).
D. Separate aluminum members from dissimilar metals with
protective coating or sheet capable of preventing
electrolytic action.
E. Ensure that weep and condensation control measures
function properly.
F. Field-Applied Sealants: Clean and prime surfaces as
required to assure proper adhesion; apply in accordance
with sealant manufacturer's guidelines and joint
dimensions shown on approved shop drawings.
G. Coordinate with other work.
3.4 CLEANING AND REPAIR
A. Remove labels, part number markings, sealant smears,
handprints, and construction dirt; protect installed work
from damage.
B. Clean all exposed surfaces immediately prior to final
inspection, using non-abrasive materials and methods
recommended by manufacturer.
C. Repair damaged components and finishes in accordance with
manufacturer's recommendations; replace work that cannot
be repaired to the satisfaction of the Architect.
D. Protect completed work from damage.
END OF SECTION