Materials Involve in Glazing
Structural glazing in general involves the bonding of glass to a supportive load bearing metallic frame, with additional components to aid in building movement and to provide a seal from moisture/air entry. There are a variety of glasses and metallic frames available for structural glazing applications
Advantages of Structural Glazing:
1.Glazing applications Allows for broader architectural
and interior as well Facade design flexibility Increases the thermal efficiency of buildings, because the exterior exposure of metal framing is either reduced or
2. Reduces or eliminates water and air infiltration
3. Reduces the potential for thermal breakage of
4.It enhance the look of commercial building.
Responsibilities of Facad Professional:
All members of the building team must perform specific tasks to ensure a successful structural glazing application. The players or Professional and their key responsibilities may be:
1. THE ARCHITECT / ENGINEER/ Facade Contractor is the design professional to the building owner for the structure’s adequacy and performance. The architect / engineer or Facade Contractor Provides design concepts based on the building owner’s requirements,
1. Establishes all design parameters, such as wind loads, unit sizes and performance criteria, and Verifies that all site drawings are submitted in accordance with structural design requirements.
2.The general contractor has total responsibility for
construction of a project, including:
▪ Keeping costs within the contract amount,
▪Completing the project within established time frame,
▪ Selecting all sub-contractors based on quoted prices and competence,
▪ Coordinating all job-site activities and schedules &
▪ Overseeing compliance with specifications
3. THE CURTAINWALL DESIGNER / SUPPLIER engineers the design, translating it from concept to reality by:
▪ Designing the curtain wall system to meet the parameters outlined by the architect or engineer,
▪ Providing a workable system that can be erected with the required structural integrity, and that can be re-glazed in case of glass breakage,
▪ Providing a compatible substrate with sufficient design clearances to allow the proper amount and placement of the structural silicone sealant,
▪ May be responsible for the erection of the curtain wall.
4. THE GLAZIER, the key contractor for field assembled structural glazing projects,
▪ Conducts field tests of the structural silicone sealant at the job site,
▪ Performs proper surface preparations,
▪ Installs back-up materials, spacer gaskets and setting blocks,and
▪ Applies the structural silicone sealant
5. THE GLASS SUPPLIER takes the windload, glass area and dimensions into account to confirm that the glass type and thickness is adequate for the application
6. THE METAL FINISHER / SUPPLIER is a key contributor to a structural glazing system’s success, with responsibility for
▪ Consistency applying the required metal finish, such as paints or anodizing, and
▪ Supplying material that meets the structural requirements by the architects / engineer.
7. THE STRUCTURAL SILICONE SEALANT
▪ Recommend the candidate sealant for the job
▪ Review shop drawings to confirm the required contact widths of the sealants bead,
▪ Review joint shape and location
▪ Test all substrates which contact or are in close proximity tothe structural sealant, and
▪ Recommend proper surface preparation procedures.
General Guidelines for Fabrication:
The building industry’s acceptance of structural glazing has led to an increase in the number of new buildings incorporating this technique. Technical expertise in implementing this glazing method must keep pace to ensure the highest quality control is available.
In general, three guidelines must be followed:
1. ATTENTION TO DETAIL
All members of the fabrication team must pay close attention to all details.
Systems engineering or Site supervisor,glazing procedures and quality workmanship are critical factors in the success or failure of a structural glazing system.Companies that have demonstrated experience in the field of Front Elevation should be considered for this specialized work.
3. Site GLAZING
Temperature, humidity, lighting and cleanliness of the work environment are all factors that can impact the quality of workmanship. All four-sided structural glazing projects should be shop-glazed.
Spider glazing mean
SPIDERGLASS is a modern solution for exterior bolted glass assemblies, which secures the glazing to a support structure by means of point-fixings
The high-grade stainless steel fixings are designed to absorb all static and dynamic loads (i.e. the dead weight of the glass, wind loading, snow loads and differential expansion due to temperature difference) and distribute them to the support structure.
Intermediate elements which are inserted between the bolt and the glass ensure:
uniform transmission of stresses whilst avoiding local stresses;
a watertight facade.
The system incorporates SECURIPOINT (specially toughened) glass.
Application area of spider glazing
Interior partitions / atria
Spider glazing Fixing Process:
Installation & Fixing
SPIDERGLASS is a complete system for bolted glass structures. The complete package includes the glass, fixings, fasteners and SPIDER brackets for connection to the framework or structure.
The size of the supporting structure must be adequate to take the weight of the glass and the wind load conditions so it does not put any strain on the glass itself.
The glass needs to withstand the wind loads and imposed dead loads.
There must be a gap between the two panes of glass to avoid transmitting stresses and to allow space for the mastic weather seal.
Various types of support structures are possible.
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