Shear Plates
Available in 3 sizes, shear plates are round, malleable iron discs that are designed to sit flush in precut grooves. Primarily intended for wood-to-steel connections, they can also be used in wood-to-wood connections. They allow for greater load-carrying capacity in shear than can be achieved by a bolt alone. Shear plates effectively increase the strength of joints in timber construction and reduce the number of bolts required.
Shear Plate Dimensions
| Outside Diameter | Depth | Bolt Diameter | Lumber Minimum Dimension | Weight (lbs.) Per 100 Pieces | Part Numbers | ||||
|---|---|---|---|---|---|---|---|---|---|
| Plate in One Face | Plate In Both Faces | Plain | Galvanized | ||||||
| 25⁄8 | .42 | 3⁄4 | 15⁄8 x 35⁄8 | 15⁄8 x 35⁄8 | 31 | 12346 | 12347 | ||
| 4 | .62 | 3⁄4 | 15⁄8 x 51⁄2 | 13⁄4 x 51⁄2 | 89 | 12404 | 12405 | ||
| 4 | .62 | 7⁄8 | 15⁄8 x 51⁄2 | 13⁄4 x 51⁄2 | 89 | 12406 | 12407 | ||
|
Dimensions per ASTM D5933 |
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Dapping Tools for Shear Plates
The dapping tool for shear plates creates special grooves (aka daps) in timber and are required for proper installation of shear plates. Dapping tools can be used with either a drill press or a heavy duty ¾” drill.
View this video to see a dapping tool cutting grooves in timbers for the shear plates to be inserted into.
| Tool Number | Shear Plate Size | Drilled Hole Size | Dapping Tool Part Number | Replacement Blade Part Number | Replacement Pilot Part Number |
|---|---|---|---|---|---|
| 303 / TSPT67 | 25⁄8 | 13⁄16 | 18646 | 18653 | 18656 |
| 304 / TSPT102 | 4 | 13⁄16 | 18647 | 18654 | 18656 |
| 305 / TSPT102S | 4 | 15⁄16 | 18648 | 18657 | 18658 |
| Note: Tool 304 is required for 4" shear plates that are being used with 3/4" diameter bolts, while tool 305 is required for 4" shear plates that are being used with 7/8" diameter bolts. | |||||
Spike Grids
Spike grid timber connectors are engineered to enhance joint strength and rigidity while at the same time simplifying assembly procedures. Timber structures in which spike grid connectors are utilized include decks, pole frame buildings, pilings, wharves, and bridges or trestles. They are also used to advantage in the construction of pole-supported “building platforms” for conventional building of homes, resort buildings and other structures situated on hillsides as well as over or near water. Flat spike grids are used between sawn timbers, while single curved spike grids are used between round piles or poles and sawn members. Spike grids are manufactured from malleable iron in accordance with ASTM A47 grade 32510.
| Type | Part Number | Finish | Size | Depth | Bolt Hole Dia. | Bolt Dia. Max | Lumber Min. Dimensions | |
|---|---|---|---|---|---|---|---|---|
| Grid in One Face | Grid in Both Face | |||||||
| Flat | 18681 | Plain | 4-1/8" x 4-1/8" | 1" | 1.06" | 1" | 1-5/8" x 5-1/2" | 2-5/8" x 5-1/2" |
| 18682 | Galv | |||||||
| Single Curve | 18671 | Plain | 4-1/8" x 4-1/8" | 1.38" | 1.06" | 1" | 1-5/8" x 5-1/2" | -- |
| 18672 | Galv | |||||||