Engineering Specifications

Connector specifications are made available for use by engineering firms, architects, contractors and designers. Review below or click to download these specifications. PDF and DXF files for connectors are available under Product Drawings.

Download Engineering Specs (for Connectors)
Download HDPE Specs (for Risers)
Diagram of a standard concrete connector showing two wooden beams labeled Connection A and Connection B, with dimensions and labels V.1, V.2, T, d.1, d.2.
A table displaying connection capacities in pounds for various types of screws and pins, organized by connector number, number of screws and pins, timber species, load duration, and other specifications.
Table showing specifications for various timber connectors, including types, number of screws and pins, species, load duration, and electrical performance metrics.
Diagram of a round connect connector showing two connection types, with labeled measurements and loading directions for each connection.
Table comparing connection capacities for different timber species, including species such as Eastern White Pine (EWP), Douglas Fir (DF), and Red Oak (R. Oak). It lists screw counts, pin counts, load durations, and capacities in pounds for 5-inch and 8-inch diameter connectors.
Assembly diagram showing a wooden post with a mounted angled wooden beam secured with screws, illustrating connection orientation with labeled tension (T) and vertical (V) forces, and detailed technical drawing of the connection with measurements and drilling instructions.
Technical drawing of connector plates showing pin connection layout, with measurements and angles, for both 8x and 6x configurations.
Table showing connection capacity in pounds for fire tower engineered timber, including different types of connectors, screw counts, pin counts, timber species, load duration, and related specifications.
Diagram showing how to connect a connector to concrete, with illustrations of different screw hole patterns and loading directions.

1 Capacities for species not shown may be linearly interpolated based on specific gravity

2 Pins are ½” diameter and assumed to be 3.5” minimum length for 4x connectors, 5” minimum length for 6x connectors, 7” minimum for 8x connectors, 9” minimum for 10x connectors, and 11” minimum for 12x connectors

3 Capacities can be adjusted for Load Duration Factors other than 1.0

4 V2 capacities are based on ½” under timbers, if using true 6”x6” to 8”x12” timbers multiply values by 9/8. All other values are the same for full sawn and ½” under timbers

5 Connector and pins are 6061 aluminum

6 EWP = Eastern White Pine, DF = Douglas-Fir-Larch, R. Oak = Red Oak

7 Base is designed to hold 19/64” diameter, 5” long GRK Caliburn screws into concrete

Two images of HDPE 1-inch risers used in concrete construction. The first image shows a person installing a riser into a concrete form, and the second image displays a completed riser with multiple bolt holes for attachment.
Download Engineering Specs for HDPE Risers
Technical drawing of a connect 3-way connector used for connecting wooden beams, showing connection orientation and spacing requirements.
Table showing service-level connection capacity in pounds, detailing post side and beam side connection capacities based on different post sizes, timber species, and load durations.
Diagram showing 4- or 5-way connectors and corner connectors used for fire-resistant timber construction, with annotations of load directions and connection types.
Technical drawing of a 6-inch 4-way and corner post top connector plate showing pin connector layout, dimensions, and orientation details.
A table showing service-level connection capacity in pounds for different types of connectors, including 6-inch and 8-inch corners and splices, with details on screws, pins, timber species, load duration, and various capacity metrics.