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Spike Grids are used primarily in pole construction, docks, piling, wharves, and railroad and highway bridges or trestles. Flat and circular grids are used between sawn timbers, while single curve grids are used between round piles or poles and sawn members.

Manufactured from malleable iron in accordance with current ASTM Specification A-47, Grade 32510.

Spike Grids are available in 3 types : flat, single curve, and circular. Single curve fits between one rounded and one flat member. Circular fits between two flat or curved members. Flat fits between two flat members. Also available galvanized to ASTM A-153.

Install with grid applicator or hydraulically, cannot be installed by tightening standard nut.
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Item #




Bolt Hole Diameter

SPF N/A Flat N/A 4 1/8" x 4 1/8" N/A 1 in N/A 1.06 in
SPSC N/A Single Curve N/A 4 1/8" x 4 1/8" N/A 1.38 in N/A 1.06 in
SPC N/A Circular N/A 3 1/4" dia. N/A 1.20 in N/A 1.33 in
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