1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material
13. Field Fixes
14. Design
Example
Outer, diameter
D Thickness, T
Flat washer A 13/24-F M12 mm (in) 13 (0.51) 24 (0.94) 2.5 (0.10)
Flat washer A 17/30-F M16 mm (in) 17 (0.67) 30 (1.18) 3 (0.12)
Flat washer A 21/37-F M20 mm (in) 22 (0.87) 37 (1.46) 3 (0.12
This chapter provides information about the structural
performance of the Hilti cast-in anchor channel system.
Therefore, information about the steel strengths of the anchor
channels for all possible steel failure modes are covered in this
section.
Possible failure modes of anchor channel per AC232
Steel
Concrete
Steel
Concrete
Concrete
Shear (ΦV n,x )
Steel
Shear (ΦV n,y )
Tension (ΦN n )
Inner diameter,
D 1 Units
For additional design information such as interaction equations,
impact of bolt spacing to anchor channel lip strength, etc.,
see anchor channel theory, see chapter 7. The provided steel
strengths shall be applied in conjunction with the design
guidelines provided in chapter 7. Moreover, refer to chapter
5 for information about the evaluation of the concrete at the
anchorage zone and anchor reinforcement. Due of the number
of factors that can influence the concrete performance, design
guidelines are provided for its verification.
Suitable for
channel bolt
Acceptance Criteria 232 (AC232) is a comprehensive document
of technical guidelines and testing protocols for cast-in anchor
channels systems. AC232 was established through public
hearings with industry experts and building officials’ committee
approval. The published steel strength values in this brochure
are based on the International Code Council — Evaluation
Service Report 3520 (ICC ESR-3520) when applicable. Steel
strengths of anchor channels outside the scope of AC232 and
ESR-3520 (i.e. HAC CRFoS U) have been derived in accordance
with applicable testing protocols of AC232.
The design of cast-in anchor channels requires
the verification of up to 25 different failure
modes. As is the case with any other type of
anchor, its design requires the verification
of the adequacy of the steel, concrete at the
anchorage zone, and/or anchor reinforcement.
In addition, up to 5 interaction equations are
required to complete the design of the anchor
channel. Figure 2.3.1.1 illustrates the possible
failure modes of a cast-in anchor channel
system with rounded head anchors (HAC and
HAC-T). Some of the failure modes illustrated on Figure 2.3.1.1
are not applicable to HAC CRFoS U while there are additional
failure modes to HAC EDGE. For instance, pry-out is not
applicable to HAC CRFoS U.
Figure 2.2.20.3 — HBC-T washer dimensions.
Table 2.2.20.4 — HBC-T washer dimensions
Order Designation
12. Instructions
for Use
Hot dip galvanized according to ISO 10684
11. Best
Practices
Finish
10. Design
Software
Material specifications
ISO 7089 and ISO 7093-1
9. Special Anchor
Channel Design
Table 2.2.20.3 — Material specification of HBC-T washers
Specifications
8. Reinforcing
Bar Anchorage
Ensures compression forces (due to installation torque) from the
nut are distributed over a larger surface, preventing localized
damage of the base surface. Moreover, it ensures the nut
presses against a smooth surface, reducing the probability of
relaxation of the nut, as is the case when the nut bears against
uneven surfaces.
Carbon steel, Hardness A, 200 HV
7. Anchor Channel
Design Code
2.3 S
TRUCTURAL STEEL PERFORMANCE OF
HILTI ANCHOR CHANNEL SYSTEMS
Flat washers
Material
6. Loading
Figure 2.3.1.1 — Possible failure modes of an anchor channel.
86
Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
87
Anchor reinforcement verifications are not included.
Anchor channel design shall satisfy interaction equations for combined shear and tension loading.