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
Flat washers
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.
Table 2.2.20.3 — Material specification of HBC-T washers
Material specifications
Material
Carbon steel, Hardness A, 200 HV
Specifications
ISO 7089 and ISO 7093-1
Finish
Hot dip galvanized according to ISO 10684
Table 2.2.20.4 — HBC-T washer dimensions
Order Designation
Suitable for
channel bolt
Units
Inner diameter,
D
1
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
Figure 2.2.20.3 — HBC-T washer dimensions.
2.3 STRUCTURAL STEEL PERFORMANCE OF
HILTI ANCHOR CHANNEL SYSTEMS
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.
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.
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.
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.
Possible failure modes of anchor channel per AC232
Anchor reinforcement verifications are not included.
Anchor channel design shall satisfy interaction equations for combined shear and tension loading.
Figure 2.3.1.1 — Possible failure modes of an anchor channel.
Tension (ΦN
n
) Shear (ΦV
n,y
) Shear (ΦV
n,x
)
Steel Concrete Steel Concrete Steel Concrete