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
Figure 9.2.4.3— Acute angle interior FoS corner with anchor channels on
both sides — Tension
Figure 9.2.4.4 — Acute interior FoS corner with anchor channels on both
sides — Perpendicular shear
Obtuse Interior Corner
Tension: The anchor channels installed at an obtuse angle
interior corner will generate the overlapping concrete breakout
cones in tension as seen in Figure 9.2.4.5. The portion of
the concrete shaded in dark should be neglected in order
to replicate the real condition. A side edge of c
a2,b
should be
consider in analysis of channel b and side edge of c
a2,a
should
be consider in the analysis of channel a.
Perpendicular shear: The anchor channels installed at an
obtuse angle interior corner will generate the overlapping
concrete breakout planes in perpendicular shear as seen in
Figure 9.2.4.6. The portion of the concrete shaded in dark
should be neglected in order to replicate the real condition.
A side edge of c
a2,b
should be consider in analysis of channel
b and side edge of c
a2,a
should be consider in the analysis of
channel a.
Figure 9.2.4.5 — Obtuse angle interior FoS corner with anchor channels on
both sides.
Figure 9.2.4.6 — Obtuse angle interior FoS corner with anchor channels on
both sides —perpendicular shear
9.2.5 — HAC AND HAC-T DESIGN: FACE OF SLAB THE MINIMUM
DISTANCE THAT WILL ASSURE THAT THE CONCRETE CONE
DOES NOT INTERSECT BOTH IN SHEAR AND TENSION
Tension: The amount of concrete that is needed to assure that
the tension concrete breakout cones do not overlap should be
as shown in Figure 9.2.5.1. The corner distance required should
be sum of effective embedment (heff) and critical spacing (c
cr,N
)
for any one of the two channels. With that distance the channel
perpendicular to the edge can be installed at critical distance
c
cr,N
away from the corner. In Figure 9.2.4.7 the channel b is
installed at corner distance of (h
eff
+ c
cr,
N) on edge 2, then the
channel a can be installed at the corner distance of c
cr,N
on edge
1.
cha1Vcr,
2h2ch +=
efNcrNcr
hsc 5.15.0
,,
³=
efef
ef
Ncr
hh
h
s 3
1.7
3.1
8.22
,
³
÷
÷
ø
ö
ç
ç
è
æ
-=
).(b2cs0.5c
).(b24c
cha1Vcr,Vcr,
cha1
,
mmin
mminS
Vcr
+=×=
+=
Perpendicular shear: The amount of concrete that is needed
to assure that the concrete breakout planes in perpendicular
shear do not overlap should be as shown in Figure 9.2.5.2. The
corner distance required should be sum of critical height (h
cr,V
)
and critical spacing (c
cr,V
) for any one of the two channels. With
that distance the channel perpendicular to the edge can be
installed at critical distance c
cr,V
away from the corner. In Figure
9.2.4.8 the channel b is installed at corner distance of (h
cr,V
+
c
cr,V
) on edge 2, then the channel a can be installed at the corner
distance of c
cr,V
on edge 1.
Figure 9.2.5.1— Minimum distance between anchor channels at the corner
to assure the breakout cones do not intersect — Tension
Figure 9.2.5.2— Minimum distance between anchor channels at the corner
to assure the breakout cones do not intersect — Tension