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Glass types

Discussion in 'Residential Energy Codes' started by ADAguy, Aug 28, 2017.

  1. ADAguy

    ADAguy Sawhorse

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    Please clairify whether Tempered Glass:
    Has any waviness to it.
    Whether laminated glass has any waviness.
    Can we design a house today with 50% glass, assuming the glass has tinting allowing for maximum light transmission/minimum heat transfer and 6' eves.
     
  2. conarb

    conarb Sawhorse

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    house3.jpg
    No more than regular float glass, it does scratch with razor blades though.
    No more that the float glass used to make it.
    The house pictured above met California's strict Title 24 requirements, it has all triple pane with laminated in the center pane, the inner and outer panes are in some cases tempered when required by location, in the windows shown in the foreground all are tempered due to proximity to floors inside and outside.
     
    #2 conarb, Aug 28, 2017
    Last edited: Aug 28, 2017
  3. steveray

    steveray Sawhorse

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    I don't believe tempered or safety has any odd visual characteristics...Yes, just have to Rescheck it...
     
  4. Francis Vineyard

    Francis Vineyard Sawhorse

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    "The process of heating float glass to a level of soft pliability, then rapidly cooling it, will always cause optical distortion to some degree. This is the case for heat-strengthened and fully tempered glass. One common form of optical distortion is roller wave. During the heating process, glass will sag very slightly between the carrier rolls that transport the glass through the furnace. After heating, the glass passes through the quench, which “freezes” the glass, creating the compression and tension that provides either heat-strengthened or fully tempered glass. However, this process can also result in a slight deviation from optically flat glass, usually seen as ripples or roller wave. Glass thickness and size affect the amount of distortion: Generally, the thicker the glass, the less deviation from flatness, while larger glass sizes may also appear to have more distortion."

    Search "laminated tempered glass optical distortion or illusion"
     
    #4 Francis Vineyard, Aug 28, 2017
    Last edited: Aug 28, 2017
    Pcinspector1 and mark handler like this.
  5. ADAguy

    ADAguy Sawhorse

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    Thank you Francis, now consider this please; familiar with the Case Study Houses of the 40's & 50's, they had expansive areas of plate glass which would be illegal today for both safety & California energy requirements.
    Case Study #6 by Neutra is a case in question, could it be built today without dual/triple pane windows using an advanced glazing product to have the same areas of glazing? The intent is for it to replicate what wasn't built at the time, for a student laboratory today.
     
  6. Francis Vineyard

    Francis Vineyard Sawhorse

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    ADAguy, I'm not familiar with those studies, but anything is possible where cost is not questioned.

    Unlike California, in Virginia the IRC administrative section permits "Material or equipment, or both, may be replaced in the same location with material or equipment of a similar kind or capacity."

    The Virginia IRC also provides the option to use the Virginia Rehabilitation Code (IEBC) and in accordance to the exception of section 301.1; "alterations complying with the laws in existence at the time the building or the affected portion of the building was built shall be considered in compliance with the provisions of this code . . ."

    This practice sure does encourages recycling building materials from Habitat for Humanity!
     
  7. mark handler

    mark handler Sawhorse

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    ADAguy,
    You know the Performance method of the 2016 CA Energy Code is about Trade-offs. You add more Glazing by decreasing the energy usage elsewhere. create a "net-Zero house".
     
  8. Pcinspector1

    Pcinspector1 Platinum Member

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    Installing no windows is your best window of opportunity! :p
     
  9. mark handler

    mark handler Sawhorse

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    to achieve a Neutra house, no windows is not an option.

    [​IMG]
     
    Francis Vineyard likes this.
  10. ADAguy

    ADAguy Sawhorse

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    Any moment frames in this?
     
  11. Ty J.

    Ty J. Active Member

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    As code officials, we should all agree to use the term safety glazing.... tempered glass, while common nomenclature, is a brand name.
     
  12. ADAguy

    ADAguy Sawhorse

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    A brand name? I think not, a generic term for a method of producing a type of (safety glazing) glass, yes
     
  13. mark handler

    mark handler Sawhorse

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    Not when he designed it.
    Now, you could use tube steel covered with wood veneer
     
  14. mark handler

    mark handler Sawhorse

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    Tempered glass is a type of safety glazing.... so is Laminated Glass....
     
  15. ADAguy

    ADAguy Sawhorse

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    "Spot on" MH. As too wrapping the steel? Dion might take issue with that. Maybe some Simpson products might do the trick?
     
  16. mark handler

    mark handler Sawhorse

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    cant get the lateral from the wood
     

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