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Wedge Style Anchors

Saves Time, Labor, Money

The Chance Expanding Rock Anchor is a big time, labor, and money saver . . . because, in most cases, there is no need to mix concrete, melt lead, or carry extra, bulky equipment to the job. Generally, the cost of installing the Expanding Rock Anchor is about 35% less than the old-fashioned grouting method

Expands and Wedges

This anchor expands and wedges against solid walls of rock. And, once it is expanded, the harder the pull on the rod-the tighter it wedges. Wedges are made of malleable or ductile iron with a rust-resistant coating. Rod should be in line with the guy.


Installation is quick and simple. Bore the hole with hand or power drill, making sure that the diameter of the hole is 1/4-inch larger than the diameter of the unexpanded anchor. Drop the anchor in the hole. Put a bar through the large eye of the anchor rod. Turn the rod until the anchor is firmly expanded against the sides of the hole. Grouting should be done if protection of the rock against weathering is a concern.

This wedging force holds the anchor securely in place-to stay.

1, 2 or 3 Guy Strands

The large drop-forged Tripleye® rod of high-test steel holds up to three guy strands. The contour of the eye grooves keeps the guy strands from spreading, kinking, bending. . . and allows slack to be pulled up without binding, damaging, or weakening the guy.

Cat. No. Rod Dia. Rod Lth. Anchor Size Anchor Fully Exp'd Hole Size Approx Weight Per 100 No. in. Bdl.
R315* 3/4" 15" 1-3/4" 2-3/8" 2" 500 5
R330* 3/4" 30" 1-3/4" 2-3/8" 2" 700 5
R353* 3/4" 53" 1-3/4" 2-3/8" 2" 960 5
R360 3/4" 60" 1-3/4" 2-3/8" 2" 1040 5
R372 3/4" 72" 1-3/4" 2-3/8" 2" 1200 4
R384 3/4" 84" 1-3/4" 2-3/8" 2" 1300 4
R396 3/4" 96" 1-3/4" 2-3/8" 2" 1460 3
R130L 1" 30" 2-1/4" 3-1/8" 2-1/2" 1166 3
R153L 1" 53" 2-1/4" 3-1/8" 2-1/2" 1833 3
R172L 1" 72" 2-1/4" 3-1/8" 2-1/2" 2133 2
R196L 1" 96" 2-1/4" 3-1/8" 2-1/2" 2666 2

Ultimate strength ratings apply to properly installed anchors only. Failure to install within 5° of alignment with the guy load will significantly lower strength. Recommended minimum installation depth is 12" in solid rock.

Extendable Rock Anchor
Extendable Rock Anchor

The Chance Extendable Rock Anchor uses standard Pisa® couplings and rods to install the rock anchor at depths greater than standard expandable rock anchors (96”). Rods, couplings and eyenuts can be found by clicking here. Hot dipped galvanized.

Catalog No. Rod Dia. Rod Length Std. Pkg/Pallet
R84LE 1" 84” 2/50

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