1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material
6. Loading
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
Hilti Locking Channel Bolt Length
Mechanical interlock between channel lip and locking channel bolts via channel lip notches
7. Anchor Channel
Design Code
Table 2.2.11.3 — Hilti Locking Channel Bolts dimensions
Channel
Bolt
units
b 2
mm
33
(1.30)
40-300
(1.57-7.87)
13.9
M20
(in)
(1.57-7.87)
60-300
(0.55) (2.36-7.87)
Anchor Channel profile
Channel lip thickness, L th
7/64 in
HAC-40
(2.6 mm)
1/8 in
HAC-50
HAC-50 S
(3.10 mm)
5/32 in
HAC-60
(4.1 mm)
N h occurs after the installation torque is applied to the HBC-C-N t-bolt and the
2 mm deep notches are created in the lips of the anchor channel.
(5.2 mm)
Figure 2.2.11.5 — Overhang of Hilti Locking Channel Bolt (HBC-C-N).
12 2 mm
16 2 mm
20 2 mm
Property
class - 8.8
ksi 116.0
f u
f y
Coating
(N/mm 2 ) (800)
ksi 92.82
(N/mm )
2
Table 8-2 — I nstallation torque for Hilti Locking Channel Bolts (HBC-C-N)
Installation torque T inst
(Installation type A) 1
Bolt type
Units
HAC-40
HBC-C-N M12 8.8
HBC-C M16 8.8
HBC-C-N M20 8.8
Installation torque T inst
(Installation type B) 2
ft-lb
(Nm)
ft-lb
(Nm)
ft-lb
(Nm)
HAC-50
HAC-50 S
HAC-60
HAC-70
HAC-40
HAC-50
HAC-50 S
HAC-60
HAC-70
55
(75)
136
(185)
236
(320)
1 Installation type A: The fixture is in contact with the channel profile and the concrete surface
2 Installation type B: The fixture is fastened to the anchor channel by suitable steel part (e.g. square plate washer), fixture is in contact with the channel profile only
66
Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
67
1 Materials according to Annex 3, Table 1
2 Hot-dop galvanized
Although there is minimum t-bolt overhang (Lo) can be zero, for
tolerance purposes it is recommended to have a minimum t-bolt
overhang. Table 2.2.11.5 provides the minimum t-bolt overhang
length.
Installation Torque
(640)
F 2
(7 mm)
Carbon steel 1
M20
Units
(5 mm)
9/32 in
Channel
bolt
13/64 in
M16
Table 2.2.11.2 — Hilti Locking Channel Bolts (HBC-C-N)
material information
(3 mm)
Hilti Locking Channel bolt grade
Notch in channel lip created by HBC-C-N
after installation torque; 4 total.
If needed, the excess at the end of the bolt can be cut-off. The
nut shall be fully engaged. The outside face of the head of the
t-bolt has special markings to identify the t-bolt type and proper
head orientation of the t-bolt. If the t-bolt is to be cut or grind,
inspect and ensure the orientation and t-bolt type is as specified.
1/8 in
M12
There is no maximum thread protrusion limitation from the
standpoint of the function of the bolt.
The extra 2 mm shall be considered when determining the
protruding length ( l ef ) of the Hilti Locking Channel Bolt
Minimum nominal overhang,
L o
N h
Hilti locking channel bolt
diameter (mm)
Diameter
(mm)
Table 2.2.11.5 — Recommended t-bolt overhang, L o
According to AISC Steel Construction Manual, 13th Edition,
Section 14-10: “Adequate thread engagement for anchor rods is
identical to the condition described in the RCSC Specification
as adequate for steel to steel structural joints using high strength
bolts: having the end of the [anchor rod] flush with or outside the
face of the nut”.
Channel
Bolt
Minimum bolt overhang
Table 2.2.11.1 — Depth of notches
created by Hilti Locking Channel Bolts
(HBC-C-N)
13/64 in
HAC-70
Figure 2.2.11.4 – Notches in channel lips due to HBC-C-N.
Table 2.2.11.4 — Channel lip thickness
mm
11.4
(0.45)
18.5
(0.73)
M16
(in)
L
40
M12
(in)
k
mm
HAC-40
HAC-50
HAC-50 S
HAC-60
HAC-70
b 1
Diameter ø
HBC-C-N
Channel
bolt
length
Dimensions
Anchor
Channel
Profile