The threads the bolt ties
also work according this principle.
When frictional connection made, spreading ele-
ment set the anchor body ensures locking the
drill hole. The anchor fits "tightly" into the com-
ponent. Ad-
hesive cartridges injection systems, which a
threaded rod mounted, are included these fasten-
ings. When mounted with the planned torque, the
friction ensures the high load values.TBS
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2. Examples are back cut internal thread an-
chors cavity ceiling ties. Cleaning the drill holes very important for
these systems, order prevent slipping out due to
dust the drill hole.
Firmly bonded anchors join chemically the sub-
strate, e.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. through sticking with special mortar.g.
TBS
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99
Chapter The external lightning protection system
.2
