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looks ﬁn D-9 No, we require the following changes:
When using post-installed anchors located
close to the edge of a relatively thin slab
that connect plates with eccentric loads,
If we recieve no fax within 48 hours of this email, we wi
using Appendix D no change necessary and will run t
can become relatively
assume that there is
complex. The ψc,N fThank for post-installed
actor you for your assistance.
ad as presented here.
anchors highlights a unique feature of this
appendix. In order for post-installed anchors
to be designed by ACI 318, post-installed
anchors have to be tested in accordance with
ACI 355.2, Qualification of Post-Installed
Mechanical Anchors in Concrete.
ACI 355.2 defines a regime of three major
test categories; reference tests, reliability test,
and service-condition tests. Reference tests
are used to establish the baseline performance
on anchors under ideal conditions. Reliability
tests are performed to establish that anchors
are capable of safe, effective behavior under
adverse installation and service conditions.
Service-condition tests are used to establish
that anchors can resist unique in-place effects,
such as seismic loads. The results of reliability
test are compared to those from the reference
tests to determine anchor categories, which in
turn lead to a range of j factors in section
D.4 of Appendix D. Factors can be as low as
0.45 for anchors with low reliability.
The complete results of an ACI 355.2
testing program are documented by the
anchor manufacturer in a data sheet similar
to the example shown in Figure 4. This data
sheet includes; dimensional information such
as diameter, spacing and embedment; load
capacities for steel failure, pull-through, etc; Characteristic Symbol Units Nominal anchor diameter Installation Information
do Outside diameter in. :...
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- Spring '14
- Force, Tensile strength, Anchor, Bolted joint, Anchor bolt, ACI 318