1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
Concrete breakout strength in tension:
æ C' a1 ö
÷
y ed, N = ç ç
÷
C
cr,
N
è
ø
0 . 5
£ 1.0
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
9.6.4 — H
AC (T) EDGE, HAC (T) EDGE LITE AND HAC S (T) EDGE
DESIGN: TOP AND BOTTOM OF SLAB OUTSIDE CORNER
SINGLE ANCHOR CHANNEL
An imaginary line is drawn to simulate the effect of metal deck
by drawing the breakout cone in tension. It is recommended to
limit the available concrete for tension to be C a1,2 , if C a1,1 is more
than C a1,2 . The following modification should be incorporated
by modelling edge C a1,2 as the edge or manually changing the
reduction factor in the report, if profis does not allow modelling
the edge because of minimum edge requirement. Reduction
factor for edge is as seen below. Please refer to the section
7.2.3 of anchor channel theory for more information in regards
to variable C cr,N Refer Figure 9.6.3.2.
4. Design
Introduction
90° corners
The concrete strengths in tension and shear of the anchor
channel may be reduced (depending on how far the anchor
channel is away from the corner) since the concrete cones may
not be fully developed.
The design methodology is fully in accordance with the previous
sub-chapter section 9.6.3 of Design of Anchor channel, only
difference additional check described below.
Following concrete breakout in perpendicular shear is evaluated:
Figure 9.6.4.1 — HAC (T) EDGE, HAC (T) EDGE Lite or HAC S (T) EDGE —
Side breakout in perpendicular shear when Achor channel is installed at the
corner.
Concrete edge breakout strength — perpendicular shear,
direction, x+ along longitudinal axis accordance to acc. to
ESR-3520 section 4.1.3.3
Figure 9.6.3.2 — HAC EDGE, HAC EDGE Lite and HAC S EDGE — Composite slab — Shear In.
It has been observed during testing of HAC (T) EDGE, HAC
(T) EDGE Lite or HAC S (T) EDGE that concrete tends to break
towards the side edge as seen in Figure 9.6.4.1, introducing the
need to check the concrete breakout in perpendicular shear
direction x+ along the longitudinal axis of the anchor channel.
Having small side edge to the Concrete edge breakout strength
— perpendicular shear, direction, x+ along longitudinal axis is
checked and gets compared to the concrete breakout strength
— perpendicular shear, direction, y +, which ever controls
gets printed in the profis calculation report. The concrete
shear strength in +y (perpendicular to channel axis) is not the
controlling failure mode when anchor channel is installed at the
corner because of the edge plate confinement.
Concrete breakout strength — perpendicular shear, direction, y
+ accordance to Hilti method section 9.6.3 of Design of Anchor
channel chapter
Figure 9.6.4.2 — TOS or BOS HAC EDGE single channel — Shear along
perpendicular to axis y+.
Concrete edge breakout strength — perpendicular shear,
direction, x+ along longitudinal axis:
Refer to the equation below
f V cb , y ³ V ua a , y
V cb = V b . y s , v . y co 1, v . y co 2, v . y c , v . y h , v . y parallel , v
4
V b = l . a ch . f ' c . c a 31
s cr , v
æ
s
1 + å ç 1 - i
ç s
i = 2 è
cr , v
= 4 C a 1 + 2 b ch
n + 1
1.5
ö V ua a , i
÷ ÷ . a
ø V ua ,1
£ 1.0
1
y s , v =
1.5
æ c ö
è ø
y co 1, v = ç ç a 2,1 ÷ ÷ £ 1.0
c cr , v
1.5
æ c ö
y co 2, v = çç a 2,2 ÷÷ £ 1.0
è c cr , v ø
c cr , v = 0.5. s cr , v = 2 c a 1 + b ch
æ h ö
0.5
y h , v = ç ç
÷
h cr , v ÷
h cr , v
Figure 9.6.4.3 — TOS or BOS HAC EDGE single channel at certain distance –
Shear along longitudinal axis x+.
£ 1.0
è
ø
= 2 C a 1 + 2 h ch
y parallel , v = 3.5
308
Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
309