MiTek’s New ADTT-TZ Easily Solves Deck Tension-Tie Code Requirements

Originally published by: MiTek USAMay 17, 2017

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MiTek’s new Adjustable Deck Tension Tie (ADTT-TZ) effectively resists the lateral (horizontal) loads that pull a deck away from the house or structure.  The ADTT-TZ also brings users in compliance with the 2015 International Residential Code R507.2.3(2) which requires the installation of a "hold-down device" with a minimum allowable tension load of 750 lbs., in four locations on the deck. (MiTek offers the ADTT-TZ in a kit that includes 4 hold-down assemblies.) The ADTT-TZ satisfies these requirements.  

The ADTT-TZ’s real innovation is its ability for adjustable installation. Using appropriate fasteners (such as USP WS8-HDG or 3/8-in lag screws), the ADTT-TZ can be installed with the screw either adjacent or up to 4-3/8 inches below the deck joist, avoiding the need for blocking extensions.  

Easy to install, the adjustable ADTT-TZ complies with new IRC deck tie-down requirements. MiTek offers the ADTT-TZ in a kit that includes 4 tie-down assemblies.

Made of 14-gauge steel, with G-185 galvanizing, the ADTT-TZ offers a two-hole break-out washer that will work with multiple screw sizes. The development of the new ADTT-TZ is part of an overall effort by MiTek to make decks safer. Learn more:

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