ICC ESR-3027 for Kwik HUS-EZ Screw Anchors in Concrete

ESR-3027
|
Most Widely Accepted and Trusted Page 5 of 20
equal to that of the anchor. The minimum drilled hole depth,
h
0
, is given in Tables 1, 2, 6 and 8. When drilling dust is not
removed after hole drilling, make sure to drill deep enough to
achieve h
nom
, taking into account the depth of debris
remaining in the hole. If dust and debris is removed from the
drilled hole with the Hilti TE-YD or TE-CD Hollow Drill Bits or
compressed air, vacuum, or a manual pump, h
nom
is achieved
at the specified value of h
0.
The anchor must be installed into
the predrilled hole using a powered impact wrench or
installed with a torque wrench until the proper nominal
embedment depth is obtained. The maximum impact wrench
torque, T
impact,max
and maximum installation torque, T
inst,max
for
the manual torque wrench must be in accordance with Tables
1, 2 and 6. The KH-EZ, KH-EZ SS316, KH-EZ P, KH-EZ PM,
KH-EZ PL, KH-EZ C, KH-EZ C SS316, KH-EZ E, KH-EZ I
and KH-EZ CRC may be loosened by a maximum of one turn
and retightened with a torque wrench or powered impact
wrench to facilitate fixture attachment or realignment.
Complete removal and reinstallation of the anchor is not
allowed.
For installation in the soffit of concrete on steel deck
assemblies, the hole diameter in the steel deck must not
exceed the diameter of the hole in the concrete by more the
1
/
8
inch (3.2 mm). For member thickness and edge distance
restrictions for installations into the soffit of concrete on steel
deck assemblies, see Figure 12.
For installation of
1
/
4
-inch and
3
/
8
-inch KH-EZ
KH-EZ P, KH-EZ PM, KH-EZ PL and KH-EZ C, anchors on
the top of steel deck assemblies, see Table 9 for installation
setting information.
4.4 Special Inspection:
Periodic special inspection is required, in accordance with
Section 1705.1.1 and Table 1705.3 of the 2021, 2018 and
2015 IBC and 2012 IBC. The special inspector must be on
the site periodically during anchor installation to verify anchor
type, anchor dimensions, hole dimensions, concrete type,
concrete compressive strength, drill bit type and size, hole
dimensions, hole cleaning procedures, anchor spacing(s),
edge distance(s), concrete member thickness, anchor
embedment, installation torque, impact wrench power and
adherence to the manufacturer’s printed installation
instructions and the conditions of this report (in case of
conflict, this report governs). The special inspector must be
present as often as required in accordance with the
“statement of special inspection.” Under the IBC, additional
requirements as set forth in Sections 1705, 1706 and 1707
must be observed, where applicable.
5.0 CONDITIONS OF USE
Hilti KH-EZ, KH-EZ SS316, KH-EZ P, KH-EZ PM, KH-EZ PL,
KH-EZ C, KH-EZ C SS316, KH-EZ E, KH-EZ I and
KH-EZ CRC concrete anchors described in this report are
suitable alternatives to what is specified in, those codes listed
in Section 1.0 of this report, subject to the following
conditions:
5.1 The anchors must be installed in accordance with the
manufacturer’s published installation instructions and
this report. In case of conflict, this report governs.
5.2 Anchor sizes, dimensions, and minimum embedment
depths are as set forth in this report.
5.3 Anchors must be installed in accordance with Section
4.3 of this report in uncracked or cracked normal-weight
concrete and lightweight concrete having a specified
compressive strength, f′
c
, of 2,500 psi to 8,500 psi
(17.2 MPa to 58.6 MPa), and cracked and uncracked
normal-weight or sand-lightweight concrete over metal
deck having a minimum specified compressive strength,
f′
c
, of 3,000 psi (20.7 MPa).
5.4 The value of f′
c
used for calculation purposes must not
exceed 8,000 psi (55.2 MPa).
5.5 The concrete must have attained its minimum design
strength prior to installation of the anchors.
5.6 Strength design values must be established in
accordance with Section 4.1 of this report.
5.7 Allowable stress design values must be established in
accordance with Section 4.2 of this report.
5.8 Anchor spacing(s) and edge distance(s), and minimum
member thickness, must comply with Tables 1, 2 and 6
and Figure 12 of this report.
5.9 Reported values for the KH-EZ I with an internally
threaded hex washer head do not consider the steel
insert element which must be verified by the design
professional. Shear design values in this report for the
KH-EZ I are for threaded inserts with F
u
equal to or
greater than 125 ksi. For use with inserts with F
u
less
than 125 ksi, the shear values are multiplied by the ratio
of F
u
of insert and 125 ksi.
5.10 Prior to installation, calculations and details
demonstrating compliance with this report must be
submitted to the code official. The calculations and
details must be prepared by a registered design
professional where required by the statutes of the
jurisdiction in which the project is to be constructed.
5.11 Since an ICC-ES acceptance criteria for evaluating data
to determine the performance of anchors subjected to
fatigue or shock loading is unavailable at this time, the
use of these anchors under such conditions is beyond
the scope of this report.
5.12 Anchors may be installed in regions of concrete where
cracking has occurred or where analysis indicates
cracking may occur (f
t
>f
r
), subject to the conditions of
this report.
5.13 Anchors may be used to resist short-term loading due to
wind or seismic forces, subject to the conditions of this
report.
5.14 Anchors are not permitted to support fire-resistance-
rated construction. Where not otherwise prohibited in
the code, anchors are permitted for use with
fire-resistance-rated construction provided that at least
one of the following conditions is fulfilled:
 Anchors are used to resist wind or seismic forces
only.
 Anchors that support gravity load–bearing structural
elements are within a fire-resistance-rated envelope
or a fire-resistance-rated membrane, are protected
by approved fire-resistance-rated materials, or have
been evaluated for resistance to fire exposure in
accordance with recognized standards.
 Anchors are used to support nonstructural elements.
5.15 Anchors have been evaluated for reliability against
brittle failure and found to be not significantly sensitive
to stress-induced hydrogen embrittlement.
5.16 Use of KH-EZ, KH-EZ P, KH-EZ PM, KH-EZ PL, KH-EZ
C, KH-EZ E, and KH-EZ I carbon steel anchors are
limited to dry, interior locations.
5.17 Use of KH-EZ SS316, KH-EZ C SS316 and KH-EZ CRC
are permitted for exterior exposure or damp
environments.