Tubelite Inc. Submittal Letter –

Do different curtainwall back-member depths have the same Air-Water performance?

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  • MM slash DD slash YYYY
  • RE: System Depth in Curtain Wall Air-Water-Structural Test Reports

    To all concerned,

    Each of Tubelite’s curtain wall systems has multiple options for mullion depths. All mullion depths in each system have the same fundamental design, the only difference being the size of the backmember used. All other aspects of the framing system remain the same. The tests outlined in each system’s test summary were performed on one mullion depth to verify the system’s design and its ability to meet air and water infiltration requirements. Testing all system depths is not practical or warranted. Because the other mullion depths use the same glazing, pressure plates, water dams, and gaskets, the air and water infiltration test results are valid for them as well. Thermal performance is addressed in separate reports.

    Each project must be evaluated on a case-by-case basis. The structural performance of the curtain wall is dependent on the backmember depth, reinforcement, and anchoring. Framing for every project should be evaluated to ensure that it meets building code requirements, which will vary from project to project.

    Best regards,

    Gerard Schoeb
    Structural and Application Engineering Supervisor
    (616) 808-2531 Direct

    Disclaimer: The information contained in this document is intended only to address generic conditions or situations and does not apply to every installation or environment. Site-specific conditions may affect the content of this document and should be addressed on a case-by-case basis. If you have questions regarding a particular product use, application, or installation, please contact Tubelite for more specific information. Nothing in this document is intended or shall be construed as a waiver or modification of Tubelite’s Terms and Conditions of Sale or the terms of any Tubelite warranty.

Sample Submission Letter