Trubolt® is the
brand name for the wedge anchor manufactured by ITW/Red Head and is
commonly referrred to as a Red Head or Red Head anchor. Various types of
Red Head anchors have been manufactured since 1910 with a significant
amount of brand recognition. The Trubolt® is manufactured from either
zinc plated carbon steel, carbon steel that is hot-dipped galvanized, or
304 or 316 stainless steel. The Trubolt® wedge anchor
comes packaged with the correct number and type of nut and washers and
with a clip permanently mounted on the opposite end of the threads. The
expansion clip is made from stainless steel and is grooved for
undercutting purposes. The Trubolt® is a non bottom-bearing anchor which
means that it does not need the bottom of the hole for expansion
purposes. Therefore, it can be inserted into any hole drilled deeper
than the length of the anchor being used. Trubolt® threads are national
coarse threads that extend most of the length of the anchor body. These
full threads allow for versatility and virtually eliminate problems with
subsurface obstruction such as rebar. The hole to be drilled in the
base material needs to be the same diameter as the wedge anchor being
used in the application.
Embedment verification is simple when using this anchor because
the Trubolt® wedge anchor's exposed, threaded end is stamped with a
letter allowing for inspection after installation for proper embedment
depth. Hole size is critical and it is also important that the carbide
bit used to drill the hole in the concrete meets ANSI standard
B212.15-1994. The Trubolt® is tested to the criteria of ASTM E488 and
the ICC-ES AC193 standards and are FM, UL listed.
Below are step by step instructions explaining how to properly install Trubolt® wedge anchors:
1. Using a hammer drill and the correct size carbide bit, drill a
hole in the concrete deeper than the depth the wedge anchor will
penetrate. The Trubolt® wedge anchor has minimum embedment
requirements that can be found in the manufacturer's catalog.
2. Use a wire brush, vacuum or compressed air to clean out the hole.
3. Thread the nut onto the body of the wedge anchor until it is
flush with the end of the anchor, which will help protect the threads
during installation.
4. Insert the Trubolt® wedge anchor through the fixture and
into the hole drilled in the concrete. Strike the end of the wedge
anchor with a hammer until the nut and washer are tight against the
surface of the fixture.
5. Using a wrench, turn the nut clockwise 3-5 past the finger tight position.
Trubolt® wedge anchors are available in numerous materials for
use in a wide range of applications. It is important to properly install
the anchor and also to make sure that the right size anchor is chosen.
Always follow the manufacturer's instructions when using a Trubolt®
wedge anchor.
As with any anchoring project, it is important to keep safety in mind and follow instructions carefully. Always remember to wear safety goggles, handle all tools with extra care and follow all technical specifications. This article is meant to serve only as a basic explanation of concrete fasteners. Always refer to manufacturer's instructions or consult a contracting expert during any anchoring project.
Article Written By:
Bob Carlisle, President of Concrete Fasteners
Concrete Fasteners, Inc. has over 40 years of experience selling concrete fasteners. We can ship out one box or a whole pallet of concrete anchors. Our products are of the highest quality... "your satisfaction is guaranteed". We ship all orders the same day the order is received.