These hole types are used on various Simpson Strong-Tie connectors.
Round HolesPurpose: to fasten a connector. Fill Requirements: always fill, unless noted otherwise
Obround Holes Purpose: to make fastening a connector in a tight location easier. Fill Requirements: always fill.
Hexagonal HolesPurpose: to fasten a connector to concrete or masonry. Fill Requirements: always fill when fastening a connector to concrete or masonry.
Triangular HolesPurpose: to increase a connector's strength or to achieve Max strength. Fill Requirements: when the Designer specifies Max nailing.
Diamond HolesPurpose: to temporarily fasten a connector to make installing it easier. Fill Requirements: none.
Pilot HolesTooling holes for manufacturing purposes. No fasteners required.
Speed ProngsUsed to temporarily position and secure the connector for easier and faster installation.
Positive Angle Nailing (PAN) Provided when wood splitting may occur, and to speed installation.
Dome NailingThis feature guides the nail into the joist and header at a 45° angle.
Double Shear Nailing The nail is installed into the joist and header, distributing the load through two points on each joist nail for greater strength.
ITS/IUS Strong-Grip™The Strong-Grip™ seat allows the I-joist to "snap" in securely without the need for joist nails.