HAC_Technical-Guide
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Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material 6. Loading
7. Anchor Channel
Design Code
8. Reinforcing
Bar Anchorage
9. Special Anchor
Channel Design
10. Design
Software
11. Best
Practices
12. Instructions
for Use
13. Field Fixes
14. Design
Example
9.1 Overview of Hilti Anchor Channel Systems Design
9.2 HAC and HAC-T Design 9.3 HAC CRFoS U Design 9.4 & 9.5 Post Tensioned Slabs 9.6 HAC EDGE Design
Pull out: ΦN
pn
ΦN
pn
> N
aua
The concrete pull out capacity is
in accordance to ESR-3520 Sec.
4.1.3.2.4. Please refer to table 2.2.7.1,
2.2.7.2, 2.2.7.3, 2.2.16.1, 2.2.16.2 and
2.2.16.3 of chapter 02 for parameters
and section 7.3.2 of anchor channel
theory chapter 07 for analysis.
Pullout: ΦN
pn
Side-face blow-out: ΦN
sb
ΦN
sb
> N
aua
The concrete side-face blow-out
capacity is in accordance to ESR-
3520 Sec. 4.1.3.2.5. Please refer to
table 2.2.7.1, 2.2.7.2, 2.2.7.3, 2.2.16.1,
2.2.16.2 and 2.2.16.3 and table
2.2.14.1 of chapter 02 for parameters
and section 7.2.2 of anchor channel
theory chapter 07 for analysis.
Blow-out: ΦN
sb
Anchor reinforcement steel: ΦN
ca,s
ΦN
ca,s
> N
aua
The anchor reinforcement steel
capacity is in accordance to ESR-
3520 Sec. 4.1.3.2.3. Please refer
section 7.2.2 of anchor channel
theory chapter 07 for analysis.
Anchor reinforcement
steel:
ΦN
ca,s
Anchor reinforcement anchorage:
ΦN
ca
ΦN
ca
> N
aua
The anchor reinforcement anchorage
capacity is in accordance to ESR-
3520 Sec. 4.1.3.2.3. Please refer
section 7.2.2 of anchor channel
theory chapter 07 for analysis.
Anchor reinforcement
anchorage: ΦN
ca
PERPENDICULAR SHEAR
Steel Failure Modes Concrete Failure Modes
Channel bolt: Channel Lip Connection Anchor Concrete Breakout Concrete Pryout
ESR-3520
Sec. 4.1.3.3.2,
4.1.3.4.2
Hilti Method**
ESR-3520
Sec. 4.1.3.3.2,
4.1.3.4.2
ESR-3520
Sec. 4.1.3.3.2,
4.1.3.4.2
Hilti Method
ESR-3520
Sec. 4.1.3.3.4
**If the clip is selected V
sl,y
, V
sl,y
, V
sc,y
are changed in clip direction, and only static
Channel lip : фV
sl,y
фV
sl,y
> V
b
ua
The capacity of channel lip is in
accordance to ESR-3520 Sec.
4.1.3.2.2. Please refer to table 2.3.22
and 2.3.6 of chapter 02. Anchor
channel casted into concrete in
combination with the EDGE Plate
with two bolts in different positions
and with different spacing were
tested under shear load. A failure
for local bending of the channel lip
was observed and the failure load
was depending on the bolt spacing.
According to AC232, for the chosen
spacing of 75 mm and 100 mm, there
should be no mutual influence of
the two bolts on the lip failure load.
The lower observed failure loads are
probably caused by the disturbance
into concrete introduced by the plate
or from the crack which appears
with a small edge distance. In order
to cover this failure a reduction
factor for the channel lip strength
is proposed as ψ
s, sl
. The reduction
factor is similar to that for the nominal
strength of the channel lip to take up
tension loads of ESR 3520 [1] (eq. 5 in
4.1.3.2.2).
Channel lip : фV
sl,y
The value of V
sl,y
is valid only if the center-to-center distance
between the channel bolt under consideration and adjacent
channel bolts, s
bch
is at least s
chb,cr,V
. If this requirement is not met
then the value of V
sl,y
must be reduced as follow:
,,
,,
.
sl y s sl
sl y technical data
VV
y
=
s,sl
1.5
,
chb,i
1
2
chb,cr,V , 1
1
s
11
s
b
ua j
n
i
b
ua a
V
V
y
+
=
=
éù
æö
êú
+ å- ×
ç÷
ç÷
êú
èø
ëû
,, ,,0 1
0.9 3
chb cr V chb cr a s
s s cd= -³
critical bolt spacing for shear
load for the HAC-50.
where
, ,1
;.
bb
ua j ua
Where V V same dir® +
in case one bolt is loaded in the
opposite direction no positive
effect on the factor is considered
The bolt shear forces are considered only if acting in the same
direction. If one bolt is loaded in the opposite direction no
positive effect on the factor is considered.
Rebar Failure Modes
Steel Failure Modes Concrete Failure Modes
Rebar connection Rebar in tension Anchor reinf. steel EDGE
Rebar pull-out
SLS Concrete
edge
Anchor reinf.
anchorage
N/A N/A
No
(The rebar
welding is
specified such as
to have an higher
strength than the
rebar itself )
Hilti Method
(Rebar pull-
out and Rebar
connection are
performed in the
same way as for
the FoS products.)
Not permitted
Hilti Method
based on ACI
Remark in Profis Not permitted