We use cookies on this site to enhance your user experience. By clicking "I AGREE" below, you are giving your consent for us to set cookies. Privacy Policy

Wood Construction Connectors Fastening Identification Guide/Hole Types

Technical & Installation Notes

Round Holes Example
Round Holes
Purpose: To fasten a connector.
Fill Requirements: Always fill, unless noted otherwise.
Obround Holes Example
Obround Holes
Purpose: To make fastening a connector in a tight location easier.
Fill Requirements: Always fill.
Obround Holes Example
Square Holes
Purpose: To fasten a connector.
Fill Requirements: Always fill, unless noted otherwise.
Hexagonal Holes Example
Hexagonal Holes
Purpose: To fasten a connector to concrete or masonry.
Fill Requirements: Always fill when fastening a connector to concrete or masonry.
Triangular Holes Example
Triangular Holes
Purpose: To increase a connector’s strength or to achieve max. strength.
Fill Requirements: When the Designer specifies max. nailing.
Diamond Holes Example
Diamond Holes
Purpose: To temporarily fasten a connector to make installing it easier.
Fill Requirements: None.
Pilot Hole Example
Pilot Holes
Tooling holes for manufacturing purposes. No fasteners required.
Speed Prongs Example
Speed Prongs
Used to temporarily position and secure the connector for easier and faster installation.
ositive Angle Nailing
Positive Angle Nailing (PAN)
Provided when wood splitting may occur, and to speed installation.
Dome Nailing
Dome Nailing
This feature guides the nail into the joist and header at a 45° angle.
Double Shear Nailing Example
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. Double-shear nailing must be full-length catalog nail.
ITS IUS Strong Grip Example
ITS/IUS Strong-Grip™
The Strong-GripTM seat allows the I-joist to “snap” in securely without the need for joist nails.