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
å
+
=
ú
ú
û
ù
ê
ê
ë
é
×
÷
÷
ø
ö
ç
ç
è
æ
-+
=
1n
2i
ua,1
a
iua,
a
1.5
Vcr,
i
Vs,
V
V
s
s
11
1
y
).(b24cs
cha1Vcr,
mmin+=
n = n
cha
+ n
chb
is the number of all the anchors of the two
channels
s
i
is the relative distance of two anchors,
considering all the anchor on an imaginary
“unfolded” channel, where the first anchor of
the second channel, is located at a distance
d
∗
from the last anchor of the first (Figure
9.2.10.11d)
*
a2,a1 2, 1 1
dc
ab
cc=+-
90° angle Corner: 90° angle cases of corner has been drawn
in Figure 9.2.10.12a. The corner is unfolded in Figure 9.2.10.12b.
Please refer to the distance marked on the detail for 90°
angle corner case. The variable a and b has been defined and
marked up on figure representing 90° corner condition. While
unfolding the corner for this case the fictitious distance of
(a+b) is taken into consideration while placing them (a+b) apart
as shown in Figure 9.2.10.12b. Lets take into consideration
anchor b
1
of anchor channel b with shear V
a ua,b1
. Please refer
Figure 9.2.10.12b. The following equation modification factor for
spacing is used.
s,v,b1
1.5 1.5 1.5
, 1 1; 2 , 2 1; 2 , 2
cr,v , 1 cr,v , 1 cr,v , 1
1
(a+b+a ) a
(a+b)
11 1 1
sss
a aa
ua a a a ua a b b ua b
a aa
ua b ua b ua b
V VV
V VV
y =
é ùé ùé ù
æ ö æ ö æö
ê úê úê ú
+ -×+ -×+ -×
ç ÷ ç ÷ ç÷
ç ÷ ç ÷ ç÷
ê úê úê ú
è ø è ø èø
ë ûë ûë û
For the condition illustrated below in Figure 9.2.10.12b the
shear breakout plane emitting from anchor b
1
overlaps shear
plane emitting from anchor a
1
, b
2
and a
2
. Therefore the spacing
modification factor will be the equation above including the
effects of anchors a
1
, b
2
and a
2
on anchor b
1
.
ψ
co,V
modification factor for corner influence for 90° angle
corner:
The true edge distance is taken into consideration for
determination of reduction factor for corner distance. The
corner distance c
a2,a1
or c
a2,b1
, is into consideration respectively
depending on the anchor in consideration.
1.0
c
c
cc If
1.0
cc If
0.5
Vcr,
a2
Vco,
Vcr,a2
Vco,
Vcr,a2
£
÷
÷
ø
ö
ç
ç
è
æ
=
<
=
³
y
y
then
then
C
a2
=(C
a2,a1
or C
a2,b1
) distance of the
anchor under consideration to the
corner (see Figure 9.2.10.12a).
1
,,
0.5 2 ch a
cr V cr N
c s bc= =+
1
,
,,
24
0.5 1.5
ch a
cr V
cr V cr V ef
s bC
c sh
=+
= ³
Figure 9.2.10.12a — 90° Corner.
Figure 9.2.10.12b — Unfolding of 90°Corner.
Acute angle Corner: Acute corner has been drawn in Figure
9.2.10.13a. The corner is unfolded in Figure 9.2.10.13b. Please
refer to the distance marked on the detail for acute angle corner
case. The variable a and b has been defined and marked up
on figure representing acute angle corner condition. The line
is drawn perpendicular to edge 2 emitting from anchor a
1
of
anchor channel. The intersection point of this line with edge
2 is extended perpendicular to edge 1. The distance between
intersection point of this line with edge 1 and a
1
of anchor
channel a is c
a2,a1
. c
a2,a1
is taken as "a". In order to get the
dimension b, c
a2,a;b1
is calculated and is deducted from c
a2,b1
to
get b. c
a2,a;b1
is distance between anchor b
1
and intersection of
perpendicular line emitting from a
1
perpendicular to edge 2 and
line emitting b
1
perpendicular to edge 1. Refer Figure 9.2.10.13b.
While unfolding the corner for this case the fictitious distance of
(a+b) is taken into consideration while placing them (a+b) apart
as shown in Figure 9.2.10.13b.
Let's take into consideration anchor b
1
of anchor channel b
with shear V
a
ua,b1
. Please refer Figure 9.2.10.13b. The following
equation modification factor for spacing is used.
s,v,b1
1.5 1.5 1.5
, 1 1; 2 , 2 1; 2 , 2
cr,v , 1 cr,v , 1 cr,v , 1
1
(a+b+a ) a
(a+b)
11 1 1
sss
a aa
ua a a a ua a b b ua b
a aa
ua b ua b ua b
V VV
V VV
y =
é ùé ùé ù
æ ö æ ö æö
ê úê úê ú
+ -×+ -×+ -×
ç ÷ ç ÷ ç÷
ç ÷ ç ÷ ç÷
ê úê úê ú
è ø è ø èø
ë ûë ûë û
For the condition illustrated below in Figure 9.2.10.13b the
shear breakout plane emitting from anchor b
1
overlaps shear
plane emitting from anchor a
1
, a
2
and b
2
, hence the spacing
modification factor will be the equation above for the example in
the Figure 9.2.10.13b.
ψ
co,V
modification factor for corner influence for Acute angle
corner:
The side edge distance is taken into consideration for
determination of reduction factor for corner distance c
a2
. The
c
a2,a1
is taken as distance “a” in case of a acute degree angle
corner.
c
a2
=c
a2,a1
side distance of the anchor a
1
to the corner (see Figure
9.2.10.13b). The side edge distance c
a2,a1
as shown in Figure
9.2.10.13b is used in the corner modification factor for anchor
a
1
of anchor channel a. The side edge distance for anchor b
1
of anchor channel b is c
a2,b1
is used in the corner modification
factor.
1.0
c
c
cc If
1.0
cc If
0.5
Vcr,
a2
Vco,
Vcr,a2
Vco,
Vcr,a2
£
÷
÷
ø
ö
ç
ç
è
æ
=
<
=
³
y
y
then
then
1
,
,,
24
0.5 1.5
ch a
cr V
cr V cr V ef
s bC
c sh
=+
= ³
1
,,
0.5 2 ch a
cr V cr N
c s bc= =+
Figure 9.2.10.13a — Acute angle Corner.
Figure 9.2.10.13b — Unfolding of Acute angle Corner.