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  Simpson Strong-Tie Offers Enhanced Steel Shearwalls, 
Anchor Tiedown System

Products that offer ease of installation, are backed by extensive testing, and feature high load values and design flexibility can create quite a following in today’s design and construction market. Simpson Strong-Tie, a company known for creating structural building systems, has recently introduced products touting these benefits and much more. 

Strong-Wall Shearwalls
Simpson’s recent introduction of a prefabricated composite steel shearwall called the Steel Strong-Wall® provides a narrow lateral-resisting wall solution, which typically cannot be achieved with a traditional site-built wall. In the summer of 2007, Simpson introduced the most recent version of the Strong-Wall – the two-story stacked Steel Strong-Wall -- to provide high load values while using minimal wall space. This newest Steel Strong-Wall solution helps accommodate new architectural styles requiring larger room sizes and more window and door openings. 

The stacked Steel Strong-Wall® provides high load values, while using minimal wall space.According to the manufacturer, Steel Strong-Wall shearwalls have high allowable loads – up to three times higher than the company’s original Wood Strong-Wall®. 

“The new two-story stacked Steel Strong-Wall solution offers some of the highest tested loads in the industry,” said Tim Ellis, product manager, Simpson Strong-Tie. “The design transfers the compression load through the nut and rod, reducing deflection under load. The stacked wall also can be placed flush against a corner, which allows more space for window and door openings. It has the same anchor bolt template as a single-story application and does not require bearing plates for installation.”

In addition, Steel Strong-Walls boast an easy, fast installation due to fewer anchor bolts and fasteners and easy access to the top and bottom of the wall. Once installed, the shearwalls offer ease of use for the trades as well. For concrete contractors, an anchor bolt template makes the system user-friendly, and pre-attached wood studs and predrilled holes simplify electricians’ wiring. 

Anchor Tiedown for Light-Frame, Multi-Story
In August of 2007, Simpson introduced a new version of the Anchor Tiedown System (ATS), a high-strength alternative to bolted hold-downs. ATS is primarily used in three- to six-story wood-framed buildings. The system consists of a series of bearing plates and tension rods that are coupled together using an innovative coupling take-up device (CTUD). The CTUD contracts to take up any gaps that may develop as the building shrinks and settles, which occurs during and right after construction. 

A new version of the Anchor Tiedown System (ATS) is now available offering several cost advantages. “The CTUD has continuous rotation that does not ratchet, which means all hold-downs are always at full engagement and optimal performance,” said Ellis.

The new ATS provides several cost advantages. The system design eliminates the need for installers to precisely cut the rod at each floor – now only one precision cut is needed at the top floor. What’s more, the manufacturer reduced the system’s number of parts by 64 percent.

“ATS has the fewest parts of any competing product, which is important on a busy jobsite,” said Ellis. “The parts are also color-coded to help with installation.”

Simpson Strong-Wall shearwalls and ATS products are available through dealers across North America. To assist design professionals with selection of both products, Simpson Strong-Tie offers free software programs, available for download at www.strongtie.com (click on Resources – Software). 

To learn more about Simpson Strong-Tie, visit www.strongtie.com or call 1-800-999-5099. 

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