When frictional connection made, spreading ele-
ment set the anchor body ensures locking the
drill hole. When mounted with the planned torque, the
friction ensures the high load values.TBS
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2.
TBS
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en
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99
Chapter The external lightning protection system
. Ad-
hesive cartridges injection systems, which a
threaded rod mounted, are included these fasten-
ings.2 Fastening principles
There are three types force transmission from the
anchor the substrate:
• Form fit
• Adhesive bond
• Friction bond
Anchors with form-fitting tap the substrate and support
themselves it. Cleaning the drill holes very important for
these systems, order prevent slipping out due to
dust the drill hole.g. Examples are back cut internal thread an-
chors cavity ceiling ties.
Firmly bonded anchors join chemically the sub-
strate, e. The anchor fits "tightly" into the com-
ponent. through sticking with special mortar.2. The threads the bolt ties
also work according this principle
