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
Concrete breakout in shear
10. Design
Software
11. Best
Practices
12. Instructions
for Use
13. Field Fixes
14. Design
Example
Steel Failure Modes
Figure 9.6.2.12 — Hilti Profis Anchor Channel Options.
Remark for SLS crack width
LONGITUDINAL SHEAR
“Reinforcing bars comprising part
of the Hilti Anchor Channel (HAC)
system are proportioned to meet
the development length provisions
of the code as they apply to cases
where anchorage development for
fully f y is not required. The concrete
member in which the anchor channel
is installed shall be in conformance
with the requirements of the code for
reinforced concrete and designed
for the load introduced by the anchor
channel.”
Concrete Failure Modes
Channel bolt: Channel Lip Connection Anchor Concrete Breakout Concrete Pryout
ESR-3520
Sec. 4.1.3.3.2,
4.1.3.4.2 ESR-3520
Sec. 4.1.3.3.2,
4.1.3.4.2 ESR-3520
Sec. 4.1.3.3.2,
4.1.3.4.2 ESR-3520
Sec. 4.1.3.3.2,
4.1.3.4.2 ESR-3520
Sec. 4.1.3.4.3 ESR-3520
Sec. 4.1.3.4.4
Anchor reinf. steel Anchor reinf.
anchorage
Not permitted Not permitted
Crack width: w k
The characteristic crack width at
the side of the channel is calculated
based on empirical equation.
N rserv (KN) is the force on the rebar at the serviceability level and
is obtained with the safety factor for serviceability:
N r serv =
N r ua
g SLS
(KN )
Figure 9.6.2.13 — Test Setup 4 Bolts: LVDTs.
N rua is the maximum of the factored shear load of the first and
the last rebar (R1 and R4 in Figure 9.6.2.9)
γ SLS reduces the shear loads which are defined for strength
verification to a service level and should be selected by the user
in Profis >Options >Project options>safety factors. The current
“safety factor for 1st crack in SLS check“ should be renamed
in “Shear factor for serviceability crack width check” (Figure
9.6.2.12), γ SLS will be assumed 1 as default.
Remark in Profis:
If the calculated w k < 0.3 mm: Cracking of the concrete may
occur at service load levels. The characteristic crack width is
less than 0.3 mm (0.012 in.). This value is calculated based on
experimental investigations on anchor channels loaded in shear
in unreinforced concrete slabs.
Figure 9.6.2.14 — Test Setup 2 Bolts: LVDTs.
If w k ≥ 0.3 mm: Cracking of the concrete may occur at service
load levels. The characteristic crack width is x mm (x in.). This
value is calculated based on experimental investigations on
anchor channels loaded in shear in unreinforced concrete slabs.
The crack widths are smaller in case of reinforcement in the
slab. The data obtained with experimental program performed
for the development and qualification of HAC EDGE.
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Cast-In Anchor Channel Product Guide, Edition 1 • 02/2019
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