SECTION 08971

SUSPENDED GLASS

PART 1 GENERAL

SECTION INCLUDES

Suspended tempered glass wall and glass mullion framing system [with [concealed] perimeter glazing frame].

Metal anchors, suspension devices, and [patch] [planar] fittings.

[Perimeter sealant.]

PRODUCTS FURNISHED BUT NOT INSTALLED UNDER THIS SECTION

Section [_____-__________]: Placement of structural supporting anchors, plates, and recessed devices.

RELATED SECTIONS

Section [______-____________]: Preparation of adjacent work to receive work of this Section.

[Section 05500 - Metal Fabrications:	Metal fabricated attachment devices.]

Section 07190 - Vapor and Air Barriers: Perimeter vapor and air seal between suspended glass wall system and adjacent construction.

Section 07900 - Sealants: System perimeter sealant and back-up materials.

Section 08410 - Aluminum Entrances and Storefronts: Entrance Doors, frames, and glazed lights.

Section 08470 - Revolving Entrance Doors.

Section 08721 - Automatic Door Equipment.

Section 08800 - Glazing.

Section 08920 - Glazed Aluminum Curtain Wall.

Section 08952 - Translucent Panel System.

Section 08960 - Sloped Glazing: Framed, sloped glass system.

Section 08975 - Structural Sealant Glazing System.

REFERENCES

AAMA Series No. 11 - Design Windloads for Buildings and Boundary Layer Wind Tunnel Testing.

AAMA Series No. 13 - Structural Sealant Glazing Systems.

ANSI/ASTM A36 - Structural Steel.

ANSI/ASTM A386 - Zinc Coating (Hot Dip) on Assembled Steel Products.

ANSI/ASTM E330 - Structural Performance of Exterior Windows, Curtain Walls, and Doors by Uniform Static Air Pressure Difference.

SYSTEM DESCRIPTION

System: Structural suspended tempered glass, structural sealant glazed on four sides, with intermediate vertical mullions on interior and [patch] [planar] fittings.

PERFORMANCE REQUIREMENTS

Design and size components to withstand dead and live loads caused by pressure and suction of wind acting normal to plane of wall [as calculated in accordance with [________] code] [to a design pressure of [____] lb/sq ft ([____] KPa)] [as measured in accordance with [AAMA Series No. 11] [ANSI/ASTM E330]].

[Design and size components to withstand seismic loads and sway displacement as calculated in accordance with [________] code.]

Limit glass wall deflection to [flexure limit of glass] [1/200] [________]; with full recovery of glazing materials.

System to accommodate, without damage to system, components or deterioration of seals; movement within system; movement between system and perimeter framing components; dynamic loading and release of loads; deflection of structural support framing [, shortening of building concrete structural columns] [, creep of concrete structural members] [and a mid-span slab edge deflection of [____] inch ([____] mm)].

Vapor Seal with Interior Atmospheric Pressure of one inch (25 mm) SP, 72 degrees F (22 degrees C), 40 Percent RH:

No failure.

System to provide for expansion and contraction within system components caused by a cycling temperature range of [170] [____] degrees F ([95] [____] degrees C) over a [12] [____] hour period without causing detrimental affect to system components.

Not Permitted: Vibration harmonics, noises caused by thermal movement, loosening, weakening, or fracturing of

attachments or components of system.

SUBMITTALS

Submit under provisions of Section [01300] [________].

Shop Drawings: Indicate system dimensions, framed opening requirements and tolerances, anticipated deflection under load, affected related Work, accommodation for weep drainage at sill, expansion and contraction joint location and details, and field welding required.

Product Data: Provide component dimensions, describe components within assembly, anchorage and fasteners, glass, [and] [________________].

Submit [two] [_______] samples [____x____] inches ([____x____] mm) in size illustrating prefinished metal surfaces, specified glass, glazing materials, and fittings.

[Test Reports: Submit substantiating engineering data, test results of previous tests [by independent laboratory] which purport to meet performance criteria, and other supportive data.]

Manufacturer's Installation Instructions: Indicate special installation procedures and [________________].

QUALITY ASSURANCE

Perform Work in accordance with [AAMA Series No. 13] [________________].

Maintain [one copy] [[____] copies of [each] document on site.

QUALIFICATIONS

Manufacturer [and Installer]: Company specializing in manufacturing suspended glass systems with minimum [three] [_______] years [documented] experience.

[Installer for Total System:	Company authorized by system manufacturer.]

Design structural support framing components under direct supervision of a Professional Engineer experienced in design of this work and licensed [at the place where the Project is located] [in the State of [____________]].

MOCKUP

Provide mockup of system components under provisions of Section [01400] [________].

Provide [__ x __] feet ([__ x __] mm) mockup including typical glass joint, intersecting members [, glass mullion] and glass light. Assemble to illustrate component assembly including glazing materials, attachments, anchors, and perimeter sealant.

Mockup may [not] remain as part of the Work.

PRE-INSTALLATION CONFERENCE

Convene [one] [_____] week prior to commencing work of this Section, under provisions of Section [01039] [________].

DELIVERY, STORAGE, AND HANDLING

Deliver, store, protect and handle products to site under provisions of Section [01600] [________].

Protect prefinished metal surfaces with [wrapping] [strippable coating]. Do not use adhesive papers or sprayed coatings which bond when exposed to sunlight or weather.

FIELD MEASUREMENTS

Verify that field measurements are as indicated on [shop drawings] [Drawings].

****** [OR] ******

Verify that field measurements are as instructed by the manufacturer.

WARRANTY

Provide [five] [____] year warranty under provisions of Section [01700] [________].

Warranty: Include coverage for complete system for failure to meet specified requirements.

PART 2 PRODUCTS

MANUFACTURERS

[__________________________________] Product [_________].

Other acceptable manufacturers offering equivalent products:

[______________________________] Product [_________].

[______________________________] Product [_________].

[______________________________] Product [_________].

Substitutions: Under provisions of Section [01600] [________].

MATERIALS

Glass and Glazing Materials:	As specified in Section 08800 of Types described below:

Exterior Glass: Tempered, Type [________].

Glass Mullions: Tempered, Type [________].

Fittings: [Patch] [Planar] type, structural [stainless steel] [bronze] [aluminum] [________________].

Steel Sections for Support Devices: [ANSI/ASTM A36] [________]; shaped to suit.

Fasteners:	Structural steel type.

Touch-Up Primer for Steel Surfaces: Zinc rich type.

COMPONENTS

Interior Glass Mullions:	[[__ x __] inch ([__ x __] mm) nominal dimensions.] [Of sufficient size and strength to support glass wall.]

Flashings: [____] inch ([____] mm) thick [stainless steel] [________________], [________] finish [as selected], secured with concealed fastening method.

SEALANT MATERIALS

Sealant and Backing Materials: As specified in Section 07900 of Types described below:

Structural Sealant: Silicone, Type [________].

[____________________________].

FABRICATION

Fabricate components with clearances to enable installation and dynamic movement of seals.

Pre-size fittings and joints to achieve flush fit.

Prepare components to receive fitting and anchor devices. Fabricate anchors.

Arrange top attachments to ensure concealment from view.

FINISHES

Exposed to View Fittings: [Chromed] [Satin chrome] [________] finish.

Concealed Steel Items: [Galvanized in accordance with ANSI/ASTM A386 to [2.0] [____] oz/sq ft ([610 [____] gm/sq m)] [Primed with primer paint].

Apply [one coat] [[____] coats] of bituminous paint to concealed steel surfaces in contact with cementitious or dissimilar materials.

PART 3 EXECUTION

EXAMINATION

Verify site opening conditions under provisions of Section [01039] [________].

Verify dimensions, tolerances, and method of attachment with other work.

Verify wall openings and adjoining air and vapor seal materials are ready to receive work of this Section.

INSTALLATION

Install curtain wall system in accordance with [manufacturer's instructions] [AAMA - Series No. 13].

Attach to structure to permit sufficient adjustment to accommodate construction tolerances and other irregularities.

Provide alignment attachments and shims to permanently fasten system to building structure.

Align assembly plumb and level, free of twist. Maintain assembly dimensional tolerances [, aligning with adjacent work].

Coordinate attachment and seal of perimeter air and vapor barrier materials.

Install glass in accordance with Section 08800, to [utilizing the glazing system manufacturer's recommended glazing methods] [glazing method required to achieve performance criteria].

Install perimeter sealant [to method required to achieve performance criteria] [Type [____], backing materials, and installation criteria in accordance with Section 07900].

TOLERANCES

Maximum Variation from Plumb: [0.06] [____] inches every 3 ft ([1.5] [____] mm/m) non-cumulative or [0.5] [____] inches per 100 ft ([12] [____] mm/30 m), whichever is less.

Maximum Misalignment of Two Adjoining Glass Panes Abutting in Plane: [1/32] [____] inch ([0.8] [____] mm).

MANUFACTURER'S FIELD SERVICES

[Suspended glass] [Glass] product manufacturers to provide field surveillance of the installation of their products under provisions of Section [01400 [________].

Monitor and report installation procedures, unacceptable conditions and [________________].

CLEANING

Clean work under provisions of [01700] [________].

Remove protective material from prefinished metal surfaces.

Wash down surfaces with a solution of mild detergent in warm water, applied with soft, clean wiping cloths. Take care to remove dirt from corners. Wipe surfaces clean.

Remove excess sealant by moderate use of mineral spirits or other solvent acceptable to sealant manufacturer.

PROTECTION OF FINISHED WORK

Protect finished Work under provisions of Section [01500] [________].

Protect finished Work from damage.

END OF SECTION