Vitre

Glass without limitations
VITRE GLASS WALLS

Guide Specifications for USA

The specifications below are offered as suggested inclusions in glass and glazing specifications. They are not intended to be complete. A qualified design professional should verify all the information and determine what is suitable for a particular product, use and/or specific application. They must be reviewed and approved by an appropriate party before publishing as a finished specification.

SECTION 08970

STRUCTURAL GLASS CURTAIN WALLS

PART 1 GENERAL

SUMMARY

Section Includes: glass, glazing and connections for the structural glazing system, in accordance with the contract documents. Vitre Mfg. Architectural Systems' Wall Systems will be the basis of design for this application.
Related Sections:
Section 07900-Sealants: Sealants for glazing
Section 08800-Glass and Glazing

QUALITY ASSURANCE

System Sole Source Responsibility:
Glazing Material and System Design: Glass, glazing, system design and accessories are the sole responsibilities of the structural glass wall provider.
Installation Sole Source Responsibility:
Provide installation by glazing contractor acceptable to glass wall system supplier.
  1. The installer of the structural glass system is responsible for supplying and erecting the complete structural glazing system, coordinating and maintaining tolerances, between the structure and glazing system, with individual suppliers and manufacturers, and the installation of the glazing system.

Safety Glass

Where safety glass is indicated or required by authorities having jurisdiction, provide the types of products that comply with ANSI Z97.1 and 16 CFR 1201 Category II.

System Description
Design Requirements

  1. Design wind-load: _____________ PSF positive and negative
  2. Seismic zone
  3. Live load deflection of supporting structure (if any)

Structural glazing system:

  1. Fittings are designed to give a (single-point fixed) or (flush) appearance to the outward surface of the glazing system. Attachment fittings to be "spider" type or conventional patch system assemblies.
  2. The design of the structural fittings is the sole responsibility of Vitre Mfg. and its assigned agents.
  3. All connection members are to be designed to prevent high-stress concentration at the hole positions and must cope with:
    1. negative and positive wind loading
    2. seismic loads
    3. thermal movement
    4. construction tolerances
    5. live load and dead load movements
  4. All connection assemblies for the glass facade must be designed to incorporate a durable, flexible disc/pads, to accommodate hole sizes in fixing members, which allow for thermal movement and glass manufacturing tolerances.

Submittals
Submit the following in accordance with Section 08960:

  1. Shop drawings: shop drawings shall clearly indicate material and methods, indicate coordination with other trades, and bear the signed approval of the glazing system manufacturer and the glazing system installer, as well as the stamp of a licensed professional engineer registered in the State of ________.
  2. Product data: material description and installation instructions for tapes, compounds, gaskets and other materials.
  3. Samples: submit samples of glass and glazing materials required for the project. Samples of glass shall be either 6 x 6 or 12" x 12"; samples of sealants or gaskets shall be either 6 or 12" long. Submit samples of fixing hardware assemblies, complete with the glass, bolt and accessories.
  4. Calculations: submit calculations proving the structural glazing system's performance and compliance with specified loads, with the stamp of a licensed professional engineer registered in the State of ________.
  5. Test reports: submit test reports from an independent laboratory certifying that the structural glass system assemblies proposed for use have been tested. The assemblies must be similar in the type, material and design shown on the architect's drawings, utilizing (flush countersunk) or (countersunk, external disc), bolted attachments through the glass, or conventional patch system assemblies. If test reports are not available, proposed assemblies will be tested. All costs for testing will be borne by the glass system manufacturer.

Warranty
Manufacturer Warranty

  1. Provide a 5 year warranty for the design and materials supplied by the system provider. Provide written requirements for notification of the manufacturer and terms for maintaining warranty provisions.

Installer Warranty

  1. Warrant the installation for a period of 5 years for installation and repairs of failures.
    Provide written requirements for notification of the installer and terms for maintaining warranty provisions. Do not contradict the requirements of the contract documents.
  2. The warranties submitted under this section shall not deprive the owner of other rights or remedies that the owner may have under other provisions of the contract documents and the laws of governing jurisdictions, and are in addition to and run concurrently with other warranties made by the contractor under requirements of the contract documents.

Part 2 Products
Materials
Structural Glass (Wall) (Canopy) System:
The system will be designed to have custom attachment plates and fasteners whereby the facade glass will fasten to the structural support system as depicted in the architectural drawings. The basis of this specification is Vitre Mfg wall system as engineered and manufactured by Vitre Mfg. or its assigned agents.
Glass
All glass must be fully tempered (monolithic), (laminated) (insulating) glass. Overall thickness of the facade glass is to be determined by the structural glass wall system provider in accordance with specifications and drawings. Laminated glass is to be produced using laid-in-place interlayer bonded via an autoclave heat and pressure process. Minimum interlayer thickness is to be 0.060". (Poured or cast resin laminates will not be permitted.)
All glass must be horizontally tempered, eliminating tong marks. All edges will be ground flat with a frosted appearance unless otherwise noted. All edgework, holes and notches in the tempered glass panels will be completed before tempering and will comply with the requirements stated below:

  1. ASTM C1036 Standard Specification for Flat Glass
  2. ASTM C1048 Standard Specification For Heat-Treated Flat Glass
  3. ASTM C1172 Standard Specification for Laminated Architectural Flat Glass
  4. Safety glazing requirements as defined in ANSI Z97.1 and CPSC 16CFR1201
  5. Glass strength:
    1. Wind Loading
      • Vertical-1/1,000
      • Sloped-1/1,000
    2. Thermal stress
      • Design factor, 2.5 (8/1,000)
    3. Deflection
      • Deflection must be limited to prevent disengagement from framing members and to ensure conditions well within the criteria defined above.

Finishes
All exposed surfaces will be free of scratches and other serious blemishes. Rail, channel and pan cover finishes will be (Select one of the following):

  • For extruded aluminum, an Architectural Class II clear anodic coating conforming with Aluminum Association standards.
  • An Architectural Class I color anodic coating, conforming with Aluminum Association standards. Color: black.
  • An Architectural Class I color anodic coating, conforming with Aluminum Association standards. Color: dark bronze.
  • A fluoropolymer paint coating conforming with the requirements of AAMA605.2. Color will be (Specify):
  • Stainless Steel clad using an alloy 304 finished as follows (specify one): polish or satin.
  • Brass/Bronze clad finished (samples required) as follows (specify one): polish or satin.

Fittings

  1. Conventional patch system assemblies are for walls only. (See finishes section from this guide specification.) "Spider" type attachment fittings are for walls and canopies, and are predominately manufactured from Stainless Steel Grade 316. (Select type of fittings(s) from this section.)
  2. The subcontractor will demonstrate to the architect's satisfaction that the stresses induced in the glass by these fittings are compatible with the strength of the glass and the needs of the performance section of this specification.
  3. The finish of all fittings will be as called for on the architect's drawings.
  4. Attachment plates shall be designed to the architect's specification. The design shall be shown by the subcontractor to be compatible with the performance specification in all respects.
  5. Attachment plates shall provide a tolerance capability, which will cope with the full range of movements:
    1. Thermal movements occurring as a result of differential coefficients of thermal expansion within the range specified. The components used within the system will noiselessly withstand all thermal movements without any buckling, distortion, cracking, failure of joint seals or undue stress on the glass or fixing assemblies.
    2. Deflection of edge beams due to loading applied after the erection of the cladding to the magnitude specified.
    3. Maximum side sway of the structure due to wind load occurring to the magnitude specified or seismic movement to the degree specified.
    4. Deflection due to self-weight of the structural glass system.
    5. Inward and outward movements due to the design wind loads specified.
  6. Exterior countersunk discs, flush countersunk bolts and articulated swivel bolts will be machine finished; socket head bolt will be with hexagonal shank, stainless steel grade 316, or conventional patch system assemblies (for walls).
  7. Bushings will be UV-resistant nylon.
  8. Gaskets will be fully vulcanized fiber, neoprene or pre-cured silicone.

Part 3. Execution
Examination
Examine surfaces receiving the work. Verify dimensions of in-place and subsequent construction. Follow the recommendations of GANA (Glass Association of North America) as to inspection procedures. Do not begin work until unsatisfactory conditions have been corrected. Installation of work will constitute acceptance of the related construction.
Preparation
Pre-installation review: the representatives of the glass system provider, the architectural exposed-structural-steel fabricator and erector, the sealant manufacturer, the glazing installer, the architect's representative and the owner's representative shall review the glazing procedure and schedule, including the method of delivering and handling glass, and installing glazing materials. The chemical compatibility of all glazing materials and framing sealants with each other and with like materials used in glass fabrication will be established.
Installation of Glass

  1. Install in accordance with the glass system provider's requirements and the shop drawings.
  2. Employ only experienced glaziers who have had previous experience with the materials and systems being applied. Use tools and equipment recommended by the manufacturer.
  3. Plate-to-plate joints of glass are to be sealed with silicone sealant. Joint dimensions will be designed to be compatible with sealant properties and live load movement of the structure.
  4. Bolt torque: torque bolts to torques specified on shop drawings using a calibrated tool. Lock torque bolts into position to prevent back-off. Reset calibrations regularly to ensure an accurate torque.
  5. Clean glazing connectors receiving glazing materials of deleterious substances that might impair the work. Remove protective coatings that might fail in adhesion or interfere with the bonding of materials of deleterious substances that might impair the work. Remove protective coatings that might fail in adhesion or interfere with bond of sealants. Comply with the manufacturer's instructions for final wiping of surfaces immediately before the application of primer and glazing sealants. Wipe metal surfaces with an appropriate cleaning agent.
  6. Inspect each unit of glass immediately before installation. Glass that has significant impact damage at edges, scratches, abrasion of faces or any other evidence of damage will not be installed.
  7. Sealants: prime surfaces are to receive glazing sealants where required, in accordance with the manufacturer's recommendations, using recommended primers.
  8. Locate setting blocks, if required by the drawings, at the quarter points of the sill, but no closer than 6 inches to corners of the glass. Use blocks of proper sizes to support the glass in accordance with the manufacturer's recommendations.
  9. Provide spacers to separate the glass from attachment plates.
  10. Set the glass in a manner that produces the greatest possible degree of uniformity in appearance. Face all glass, which has a dissimilar face with matching faces in the same direction.
  11. Use masking tape or other suitable protection to limit the coverage of glazing materials on the surfaces intended for sealants.
  12. Tool the exposed surfaces of glazing materials.
  13. Clean excess sealant from the glass and support members immediately after the application, using solvents or cleaners recommended by the manufacturers.

Curing, Protection and Cleaning

  1. Cure sealants in accordance with the manufacturer's instructions to attain maximum durability and adhesion to glass.
  2. Clean all surfaces after the installation, leaving all in a clean and workmanlike manner.
  3. Final cleaning and protection after installation are the responsibilities of others.

END SECTION