HAC_Technical-Guide

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Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
2.1 HAC
Nomenclature
2.2 Geometric Parameters 2.3 Structural Performance
2.4 Ordering
Information
2.5 Standard
Portfolio
2.6 HAC Custom
Solutions
HAC
HAC
CRFoS U
HAC EDGE HBC-C
HAC-T
HAC-30
HAC-T
EDGE
HBC-T
HBC-B
HAC
HAC
CRFoS U
HAC EDGE HBC-C
HAC-T
HAC-30
HAC-T
EDGE
HBC-T
HBC-B
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
Minimum substrate requirements for HAC-T
and HAC-30
The minimum edge distance and member thickness for anchor
channels are established via testing. It is the interaction
between minimum member thickness and minimum edge
distance that determines the minimum edge distance. If the
anchor channel is installed closer than the minimum edge
distance, cracking of the concrete may occur while applying
the required installation torque to the t-bolts. Testing to
determine the minimum edge distance considers unfavorable
site conditions. The test is based on having the anchor channel
recessed 1/8" in unreinforced concrete. Splitting/cracking
may occur. Therefore, minimum substrate requirements vary
depending on the anchor channel size. HAC-T substrate
requirements are provided in Table 2.2.13.2 and 2.2.13.3.
Table 2.2.13.2 — Minimum substrate dimensions for HAC-T
and HAC-30 in normal weight and sand-
lightweight concrete
Anchor
channel
Units h
ef
c
a1
c
a2
*h
min
HAC-30
in 2.68 1.97 1.97 3.15
(mm) (68) (50) (50) (80)
HAC-T50
in 3.70 3.94 3.94 3.94
(mm) (94) (100) (100) (100)
in 4.17 1.97 1.97 4.92
(mm) (106) (50) (50) (125)
HAC-T70
in 6.89 2.95 2.95 7.72
(mm) ( 175) (75) (75) (196)
Table 2.2.13.3 — Minimum substrate dimensions for HAC-T
and HAC-30 in all lightweight concrete
Anchor
channel
Units h
ef
c
a1
c
a2
h
min
HAC-30
in 2.68 2.95 2.95 3.15
(mm) (68) (75) (75) (80)
HAC-T50
in 3.70 3.94 3.94 3.94
(mm) (94) (100) (100) (100)
in 4.17 2.95 2.95 4.92
(mm) (106) (75) (75) (125)
HAC-T70
in 6.89 2.95 2.95 7.72
(mm) ( 175) (75) (75) (196)
* Minimum slab thickness, h
min
may be reduced if anchor cover requirements can be omitted
(i.e. interior applications with metal deck underneath the channel). To avoid splitting of the
concrete, the minimum edge and corner distance shall be increased by a factor of 2.
Edge distance facts:
• Any edge perpendicular to the long axis of the anchor
channels is considered an edge.
• For determination of the minimum edge distance,
c
a1
= min of c
a1,1
and c
a1,2
• For analysis purposes, c
a1
is always measured in the direction
of the applied shear load.
• Edge distances are always measured from the center of the
anchor under consideration.
Corner distance facts:
• Any edge parallel to the long axis of the anchor channels is
considered a corner
• For determination of the minimum corner distance,
c
a2
= min of c
a2,1
and c
a2,2
• Corner distances are always measured from the center of the
anchor under consideration
c
a1
= min of c
a1,1
and c
a1,2
c
a2
= min of c
a2,1
and c
a2,2
Corner and edge distances are measured to the center of the anchor.
Figure 2.2.13.6 — Minimum HAC-T and HAC-30 edge and corner distances,
plan view.
Figure 2.2.13.7 — Minimum HAC-T and HAC-30 member thickness,
isometric view.
Single HAC-T or HAC-30 in face of slab corners
AC232 provides design guidelines to account for the influence of
corners where only one anchor channel is present. The design of
this type of applications is covered in ESR-3520. Table 2.2.13.1
provides the minimum edge and corner distances for HAC-T and
HAC-30.
Corner distance c
a2
is measured to the center of the anchor.
Figure 2.2.14.1 — Minimum corner distances for single HAC-T, plan view.
Table 2.2.14.1 — Minimum substrate edge and corner
distances for single HAC-T or HAC-30 in a
corner in normal weight, sand-lightweight
and all light-weight concrete
Anchor
channel
Units h
ef
Minimum c
a1
Minimum c
a2
HAC-30 in (mm) 2.68 (68) *1.97 (50) *1.97 (50)
HAC-T50
in (mm) 3.70 (94) 3.94 (100) 3.94 (100)
in (mm) 4.17 (106) *1.97 (50) *1.97 (50)
HAC-T70 in (mm) 6.89 ( 175) 2.95 (75) 2.95 (75)
*For all-lightweight concrete, c
a1
= c
a2
= 2.95” (75 mm)
Pair of HAC-T or HAC-30 in a corner
AC232 does not include provisions to account for the influence
of an adjacent channel in a face of slab corner. Technically,
HAC-T or HAC-30 can be used in both sides of the corner, if
there is no overlapping of the anchors.
Additional measurements shall be taken in consideration to
account for the negative influence of the adjacent anchor
channel, if both channels are to be loaded simultaneously.
See chapter 9, Anchor Channel Design for additional design
information. Although this solution is technically feasible,
installing anchor channels at 4 to 7 inches away from the corner
typically results in unpractical bracket sizes, large eccentricities,
large forces, and consequently, inadequate concrete strengths.
Tables 2.2.14.2 and figure 2.2.14.2 provide information about the
minimum corner distance for pair of HAC. See chapter 9, Anchor
Channel Design for additional design information.
Table 2.2.14.2 — Minimum substrate edge and corner
distances for pair of HAC-T or HAC-
30 in corners in normal weight, sand-
lightweight and all light-weight concrete
Anchor
channel
Units h
ef
Minimum c
a1
Minimum c
ca2
HAC-30 in (mm) 2.68 (68) *1.97 (70) 2.76 (70)
HAC-T50
in (mm) 3.70 (94) 3.94 (100) 3.70 ( 97.50)
in (mm) 4.17 (10 6) *1.97 (50) 4.31 (109.50)
HAC-T70 in (mm) 6.89 ( 175) 2.95 (75) 7.09 (180.00
*For all-lightweight concrete, c
a1
= 2.95” (75 mm)
Corner distance c
ca2
is measured to the center of the anchor.
Figure 2.2.14.2 — Minimum corner distances for pair of HAC-T, plan view.
For face of slab applications, it is not recommended to
install HAC-T or HAC-30 in both sides of the corner if there
is overlapping of the rounded head anchors and they will
experience simultaneous loading.
The overlapping of the two anchor of the corner channels
creates a weakened failure plane, making the corner susceptible
to undesired cracking and therefore, reduced concrete
strengths.
Figure 2.2.14.3 — Premature concrete cracking due to simultaneous loading
of pair HAC-T at corner with overlapped anchors, plan view.
2.2.14 HAC-T AND HAC-30 IN FACE OF SLAB CORNERS