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Strong-Rod™ Systems Assemblies

  1. Simpson Strong-Tie reserves the right to change specifications, designs, and models without notice or liability for such changes.
  2. Steel used for each Simpson Strong-Tie® product is individually selected based on the product’s steel specifications, including strength, thickness, formability, finish and ability to weld. Contact Simpson Strong-Tie for steel information on specific products.
  3. Unless otherwise noted, dimensions are in inches, loads are in pounds.
  4. Do not overload. Do not exceed published allowable loads that would jeopardize the connections.
  5. Wood shrinks and expands as it loses and gains moisture content, particularly perpendicular to its grain. Take wood shrinkage into account when designing and installing connections. The effects of wood shrinkage are increased in multiple lumber connections, such as floor-to-floor installations. This may result in the nuts for the vertical rod system becoming loose, requiring tightening (unless shrinkage compensating devices are installed). Section 2304.3.3 of the 2015 IBC requires wood structures supporting more than two floors and a roof be analyzed for the effects of wood shrinkage. Refer to the Wood Shrinkage Calculator for more information. See ICC-ES ESR-2320 for additional information on Simpson Strong-Tie take-up devices.
  6. The term "Designer" used throughout this guide is intended to mean a qualified licensed professional engineer or a qualified licensed architect.
  7. All connected members and related elements shall be designed by the Designer.
  8. Where multiple members of lumber are intended to act as one unit, they must be fastened together to resist the applied load. This design must be determined by the Designer.
  9. Local and/or regional building codes may require meeting special conditions, such as rod elongation limits. Also, building codes often require special inspection of anchors installed in concrete and masonry. For compliance with these requirements, it is necessary to contact the local and/or regional building authority. Except where mandated by code, Simpson Strong-Tie products do not require special inspection.
  10. All installations should be designed in accordance with the published allowable load values.
  11. The Designer is responsible for verifying that all design loads do not exceed the allowable loads listed for each component in the restraint system.
  12. Corrosion information may be found at strongtie.com/corrosion.
  13. Components should be kept dry and away from corrosive materials and away from steel that has already shown signs of corrosion.
  14. Once installed, take precautions to prevent the RTUD from getting wet and freezing. Permanent damage may result if the installed device freezes when it has water inside it.