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HPD Public Repository

Withdrawn HPDs

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  1. FeltWorks Blades and Open Cell/Armstrong World Industries/2026-01-28

    Open the PDF · HPD 43229

    Expiration Date: 2029-01-28

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    Linear and interlocking blades

  2. Aluminum Trims Transitions Suspension Systems/Armstrong World Industries/2025-09-24

    Open the PDF · HPD 41899

    Expiration Date: 2028-09-24

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    Pre-engineered extruded aluminum building perimeter trim integrates air distribution, draperies, blinds, mechanical shades, or changes in ceiling elevations without any visible fasteners. This system allows quality control at the…

  3. Clean Room Suspension System Steel/Armstrong World Industries/2026-03-30

    Open the PDF · HPD 37401

    Expiration Date: 2029-03-30

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    This suspension system with integral gasket is designed specifically for clean rooms, food processing areas, and data centers.

  4. Expiring soon: Steel Suspension Systems Prelude Suprafine Silhouette and Interlude/Armstrong World Industries/2025-01-29

    Open the PDF · HPD 35989

    HPD will expire soon. Expiration Date: 2026-10-16

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    This declaration covers hot-dipped galvanized and painted galvanized steel products including Prelude®, Suprafine®, Silhouette®, and Interlude® Suspension Systems

  5. FrameAll Drywall Grid Short Span Drywall Framing System QuikStix Drywall Grid/Armstrong World Industries/2026-03-09

    Open the PDF · HPD 33907

    Expiration Date: 2029-03-09

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    Pre-engineered galvanized steel drywall ceiling suspension systems that install faster than traditional track and channel drywall framing.