Setting of glass 3. Structural Glazing & VGG 2008 Technical Advisory Service
Setting of glass 3. Structural Glazing & VGG 2008 Technical Advisory Service Setting of glass Traditional setting Particular setting – Floors – Portholes –… Structural glazing Bolted glazing Setting of glass : Structural glazing & VGG Introduction to « glazed façades » Structural glazing VGG Setting of glass : Structural glazing & VGG Introduction to « glazed façades » Structural glazing VGG Structural glazing Principles of the Structural Glazing Details and types of Structural Glazing The different parties and the coordination Calculation of the sealing heigth Glazing products Setting Maintenance, inspection and replacement Principles of the Structural Glazing Curtain wall Structural Glazing Principles of the Structural Glazing 1960: Detroit: first application in single glazing 1970: Extension of system to insulating glass Sealing on site Advantages Inconveniences simple bad working conditions economical climatic conditions pollution Principles of the Structural Glazing 1980 – Introduction of the concept en Europe Use in double glazing The concept is more complex Sealing on framework in factory Advantages Inconveniences better control of operations mogelijkheid om possibility to integrate in opening window complex technology increase of intervening parties Principles of the Structural Glazing Principles of the Structural Glazing Structural glazing Principles of the Structural Glazing Details and types of Structural Glazing The different parties and the coordination Calculation of the sealing heigth Glazing products Setting Maintenance, inspection and replacement Details and types of Structural Glazing Horizontal section Structure Compatible backer rod Structural sealant Structural seala Structural sealant DG DG Compatible backer rod Silicone watertigth joint Details and types of Structural Glazing Vertical section Compatible backer rod Structural sealant Stuctural sealant DG Silicone watertigth joint Setting block compatible Frame Details and types of Structural Glazing Setting blocks and safety devices Type 1 With devices of mechanical selfweight support Type 2 Veiligheids voorzieningen Voorzieningen om het eigengewicht op te nemen With safety devices Without safety devices Type 3 With devices of mechanical selfweight support Veiligheids voorzieningen Type 4 Beglazing Verlijmingskader Details and types of Structural Glazing Double glazing: Unstepped or stepped d1 d2 h r r h r Details and types of Structural Glazing Mastics – Sealing mastic – Watertightness mastic Glass products – Simple glazing – Double glazing – Spacer 1 SYSTEM Sealing area – Anodic aluminium – Coated aluminium – Other areas EOTA (ETAG 2) Details and types of Structural Glazing 1 DG spacer 2 Outside sheet DG 3 Safety – mechanical self-weight support 4 Waterproof seal 5 Fond de joint 6 Sticking bead 7 Silicone structural 8 Frame 9 Waterproof seal 10 Waterproof seal 11 - 12 Clip 13 Structure Type 1 example Details and types of Structural Glazing Advantages of stuctural glazing: Excellent water and airtight façade Good acoustical insulation Natural thermal breakage Very little risk for thermal shock Easy cleaning of façade Protects building structure against corrosion Details and types of Structural Glazing Inconveniences of stuctural glazing : Cooperation necessary between different partners Difficult procedures Longer delivery time for supplies Difficult transport and handling Massive structure visible when non-reflecting glass is used Structural glazing Principles of the Structural Glazing Details and types of Structural Glazing The different parties and the coordination Calculation of the sealing heigth Glazing products Setting Maintenance, inspection and replacement Coordination and communication SEALANT MANUFACTURER GLASS MANUFACTURER FAÇADE BUILDER Coordination BUILDING OWNER BONDING COMPANY Coordination and communication FAÇADE BUILDER Co-ordinate all project operations Define the concept of structual glazing Communicate necessary information to glass supplier (wind load, dimensions, …) Control each anodization batch Draw a sketch of wall with identification number of frames Coordination and communication SEALANT MANUFACTURER Realise conformity tests on framework and glass Give bonding company the results and recommendations Approve structural salant and double glazing calculations Give advise regarding the concept of Structural glazing Ensure compatibility of materials in contact with VEC or VI sealant Technical support bonding company Coordination and communication GLASS MANUFACTURER Organise conformity tests on glass products by sealant manufacturer Compute the height of edge seal (r) Inform façade builder about type of sealant Verify if the concept of Structural Glazing is compatible with its DGU guarantee Coordination and communication BONDING COMPANY Respect procedures developed by bonding company Respect the plans of the façade builder concerning the dimensions, nature of sealant, cleaning products, primers, … and the identifying of the units Auto-control of the factory + rRegister auto-control and sealant conditions (t°, RH%,…) Give access to workshop during sealing period Send copy of results of auto-controls to façade builder Coordination and communication OWNER OF THE BUILDING Annual inspection, by a qualified staff, structural seals and glazings according the service manual done by the façade maker. In case of damages, replacement should be done as quickly as possible Structural glazing Principles of the Structural Glazing Details and types of Structural Glazing The different parties and the coordination Calculation of the sealing heigth Glazing products Setting Maintenance, inspection and replacement Calculation Apportionment of the responsibilities 1 2 3 h r r h h r: to be calculated by AGC Flat Glass Europe h: to be calculated by the mastic supplier Calculation Case 1 : Unstepped double glazing d1 r d2 Calculation Case 1: Unstepped double glazing If d1 > d2 : a W r 10 6 2 rmin = 6 mm Tolerance +/- 2mm => min. 8mm Calculation Case 1: Unstepped double glazing If d1 ≤ d2 : a W 1 6 r 10 2 2 rmin = 6 mm Tolerance +/- 2mm => min. 8mm Calculation Case 2: Stepped double glazing 2 1 h r h r Calculation Case 2: Stepped double glazing If the structural sealing « h » takes only the inside sheet : The « r » sealing of the DG has no structural function => rmin = 4 mm If the structural sealing « h » takes only the outside sheet : The sealing of the DG has a structural function and the « r » calculation can be done according case 1 : stepped double glazing without Structural glazing Principles of the Structural Glazing Details and types of Structural Glazing The different parties and the coordination Calculation of the sealing heigth Glazing products Setting Maintenance, inspection and replacement Glazing products The following products can be used in Structural glazing: Planibel clear, coloured Stopsol (Classic, Supersilver, Silverlight ) Sunergy Stopray (edge stripping necessary) Top N / Energy N (edge stripping necessary) Remark: Glazing products with high reflection allows to hide the metallic structure Glazing products => In case of DGU, only the thermobel Silicone can be used: Minimum dimensions : 250 X 450mm Maximum dimensions limited by: – maximum allowable weight on the profiles – wind load – composition Cutting: - only linear cutting - no angle less than 15° - for angles between 15° en 30°, the edge are grinded Glazing products Single glazing Vision double glazing Stepped vision double glazing Float: vision spandrel Ext. S. Int. S. Ext. S. Int. S. Annealed yes no* yes yes yes * yes Heatstrenght. yes yes yes yes yes yes Tempered yes yes yes no* no* no* Laminated yes yes yes yes yes * yes Laminated H.S./ tempered yes yes yes yes yes yes Structural glazing Principles of the Structural Glazing Details and types of Structural Glazing The different parties and the coordination Calculation of the sealing heigth Glazing products Setting Maintenance, inspection and replacement Setting Single or double glazing : – The system must be drained – The “net” weight must be taken up by wegdes – The materials used must be agreeable – Laminated glass : all the sheets must be held + drainage Setting Double glazing Thermobel S : – The « net » weight of the 2 glazings must be taken up by setting blocks L S 25 sin nR – The materials used must be compatible – The structure of the façade cannot provoque any dynamic or stativ load on the glazing – No stagnation of water is allowed in the rebatew Structural glazing Principles of the Structural Glazing Details and types of Structural Glazing The different parties and the coordination Calculation of the sealing heigth Glazing products Setting Maintenance, inspection and replacement Maintenance, inspection and replacement Inspection of 1st level: Irregularities that can be notified by the occupants : • condensation, even momentary, of the DG • Defects of the system of drainage,… Irregularities that can be notified by the maintenance services : • Coloration of the silicone • Rip or deficiency of sticking of the mastic, … Maintenance, inspection and replacement Inspection of 2nd level : – This inspection must Control eventual defects of the watertightness seals and VEC seals. Verify that there is no change in the setting of the sealing. Control of the supports and the movements of the building. Control statistically the sticking of the sealing supports. – Inspection report => façade builder =>partners =>actions Maintenance, inspection and replacement Replacement : – Upon the project foresee possibilities of replacement. – Drawings and methods must be available for the fitter. Setting of glass : Structural glazing & VGG Introduction to « glazed façades » Structural glazing VGG VGG Principles of VGG Glazing products The different parties and the coordination Calculation of the sealing heigth Setting Principes of VGG Structural Glazing VGG Principes of VGG Thermobel Silicone VGG d1 de= 16 d2 i h r e air sec external glass silicone DC 3362 insert Internal glass Principes du VGG Principes of VGG Summary - What is VGG? – Particular structural glazing patented by AGC – Ensures a mechanical fixation of Thermobel silicone on a structure – Only for insulating glazing Principes of VGG Principes of VGG Principes of VGG Principes du VGG Advantages of the VGG Same aspect as the Structural Glazing Natural thermal breakage Excellent water and airtight façade Protects building structure against corrosion Easy cleaning of façade Very little risk for thermal shock Adaptable on standard profiles 50 of profile suppliers Less partners = simplified relations VGG Principles of VGG Glazing products The different parties and the coordination Calculation of the sealing heigth Setting Glazing products Only DGU are compatibel with VGG: Planibel clear, coloured Stopsol (Classic, Supersilver, Silverlight ) Sunergy Stopray (edge stripping necessary) Top N / Energy N (edge stripping necessary) Glazing products => Processing possibilities of Thermobel Silicone VGG : • Minimum dimensions : 250 X 450mm • Maximum dimensions limited by: – maximum allowable weight on the profiles – wind load – composition • Cutting: - only linear cutting - no angle less than 15° - for angles between 15° en 30°, the edge are grinded VGG Principles of VGG Glazing products The different parties and the coordination Calculation of the sealing heigth Setting The different parties and the coordination SEALANT MANUFACTURER GLASS MANUFACTURER FAÇADE BUILDER Coordination BUILDING OWNER BONDING COMPANY VGG Principles of VGG Glazing products The different parties and the coordination Calculation of the sealing heigth Setting Calculation of the sealing heigth Method following Structural glazing case 1 e Glaverbel r i VGG Principles of VGG Glazing products The different parties and the coordination Calculation of the sealing heigth Setting Setting Double vitrage Thermobel S: – The weight of the 2 glazings must be taken up by setting blocks S 25 L sin nR – The materials must be compatible – The structure of the façade cannot provoque any dynamic or static load on the glazing – No stagnation of water is allowed in the rebate – The internal glass of the DGU cannot be tempered – Minimal glass thickness 6mm float and 44.1 laminated Materials Materials Importance of the planeity of the fixation and the tighness profiles insert Point of fixation Support The glass surface and the profile must be at the same (alignment) Utilise an adapted profile in function of the glass thickness Stucture
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