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General Instructions to the Installer

Technical & Installation Notes

These general instructions to the installer are provided to ensure proper selection and installation of Simpson Strong-Tie products and must be followed carefully. These general instructions are in addition to the specific installation instructions and notes provided for each particular product, all of which should be consulted prior to and during installation of Simpson Strong-Tie products.

  1. All specified fasteners must be installed according to the instructions in this catalog. Incorrect fastener quantity, size, type, material, or finish may cause the connection to fail.
  2. Holes for 1/2" diameter or greater bolts shall be no more than a maximum of 1/16" larger than bolt diameter per AISI S100 Table E3.
  3. Install all specified fasteners before loading the connection.
  4. Some hardened fasteners may have premature failure if exposed to moisture. The fasteners are recommended to be used in dry interior applications.
  5. Use proper safety equipment.
  6. When installing a joist into a connector with a seat, the joist shall bear completely on the seat. The gap between the end of the joist and the connector or header shall not exceed 1/8" per ICC-ES AC 261 and ASTM D1761 test standards, unless otherwise noted.
  7. For holdowns, anchor bolt nuts should be finger-tight plus 1/3 to 1/2 turn with a hand wrench. Care should be taken to not over-torque the nut and impact wrenches should not be used. This may preload the holdown.
  8. Holdowns and tension ties may be raised off the track as dictated by field conditions to accommodate an anchor mislocated no more than 1 1/2". The holdown shall be raised off the bottom track at least 3" for every 1/4" that the anchor is offset from the model’s centerline. Anchor bolt slope shall be no greater than 1:12 (or 5 degrees). Contact the designer if the holdown anchor is offset more than 1 1/2" or raised more than 18". Raised holdown height is measured from the top of the concrete to the top of the holdown bearing plate.
  9. All screws shall be installed in accordance with the screw manufacturer’s recommendations. All screws shall penetrate and protrude through the attached materials a minimum of three full exposed threads per AISI S200 General Provisions Section D1.3.
  10. Welding galvanized steel may produce harmful fumes; follow proper welding procedures and safety precautions. Welding should be in accordance with American Welding Society (AWS) standards. Unless otherwise noted, Simpson Strong‑Tie connectors cannot be welded.
  11. Temporary lateral support for members may be required during installation.