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  1. Expired: Armstrong Ceilings Calla/Armstrong World Industries/2019-12-19
    Cover of Armstrong Ceilings Calla — open the PDF

    Open the PDF · HPD 9726

    HPD has expired. Expiration Date: 2022-09-20

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    The smoothest finish mineral fiber ceiling available with Total Acoustics™ performance – excellent noise reduction and sound blocking in one product.

  2. Expired: Armstrong Suspension Systems Drywall Grid System/Armstrong World Industries/2019-09-11
    Cover of Armstrong Suspension Systems Drywall Grid System — open the PDF

    Open the PDF · HPD 8899

    HPD has expired. Expiration Date: 2020-09-11

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    Pre-engineered drywall ceiling suspension systems that are three times faster to install than traditional track and channel framing. Pre-notched main beams simplify curved drywall installations and help make easy work of complicated…