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Methods of Specification | Canada

Methods for Specifying

We recognize that specifying the Simpson Strong-Tie Strong-Rod Anchor Tiedown System (ATS) for shearwall overturning restraint is unlike choosing any other product we offer. You must first address several design questions and considerations to ensure that the system will be configured to meet the design’s intent. For example, when determining whether to use Strong-Rod Systems or conventional holdowns and strapping, a Designer must determine the project’s incremental and cumulative loads or specification of elongation and system deflection limits. The Designer will need to determine the compression posts, sheathing thickness and grade, nailing schedule, horizontal drift, and meet all other requirements in accordance with the applicable building code.

We currently offer the following two methods of specifying:

Specify Pre-Engineered Runs

The catalogue provides Designers with pre-engineered ATS runs, which can be specified in the construction documents with associated details. The Designer will be required to determine the overturning tension force at each level and choose the pre-engineered run from the tables within this catalogue based on the number of floors and the necessary capacity. See a design example and the full list of pre-engineered runs.

Handling Deferred Submittals

The Designer may also choose to provide general specifications and loads in the construction documents and require the contractor to submit deferred design calculations and shop drawings. The Designer can download generic specifications and notes to place in the construction documents. Generic details can also be obtained to insert into the Designer’s construction documents.

Some of the items required to be included in the Designer’s construction document are:

  • System elongation limits at each level
  • Cumulative tension and compression loads at each level
  • Anchor diameter
  • Details of system run start and termination General Notes for rod system design