1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material
6. Loading
Minimum cover requirements: ACI 318-14 20.6.1.3
The specified concrete cover is measured as the distance between the outermost surface of embedded reinforcement and the
closest outer surface of the concrete. The concrete cover can also be measured as the spacing from rebar to rebar. The tables
below further explain the specified concrete cover requirements.
Table 8.7.1.1 (ACI 318-14 Table 20.6.1.3.1) — Specified concrete cover for cast-in-place nonprestressed concrete members
Member Reinforcement Specified cover, in.
Cast against and permanently in
contact with ground All All 3
Exposed to weather or in contact
with ground All No. 6 through No. 18 bars 2
No. 5 bar, W31 or D31 wire, and smaller 1-1/2
No. 14 and No. 18 bars 1-1/2
No. 11 bar and smaller 3/4
Primary reinforcement, stirrups, ties,
spirals, and hoops 1-1/2
Not exposed to weather or in
contact with ground
Slabs, joists, and walls
Beams, columns, pedestals, and
tension ties
Table 8.7.1.2 (ACI 318-14 Table 20.6.1.3.2) — Specified concrete cover for cast-in-place prestressed concrete members
Member Reinforcement Specified cover, in.
Cast against and permanently in
contact with ground All All 3
Slabs, joists, and walls All 1
All other All 1-1/2
Slabs, joists, and walls All 3/4
Primary reinforcement, stirrups, ties,
spirals, and hoops 1-1/2
Stirrups, ties, spirals, and hoops 1
Exposed to weather or in contact
with ground
Not exposed to weather or in
contact with ground
Beams, columns, and tension ties
11. Best
Practices
12. Instructions
for Use
13. Field Fixes
14. Design
Example
9. SPECIAL ANCHOR
CHANNEL
DESIGN
Chapter 7 (Anchor Channel Design Code) and chapter 8 (Reinforcing Bar Theory) provide the
required information to have a deep understanding of the behavior of an anchor channel with
rounded headed anchors and rebars. This chapter combines the information presented in chapter
7 and 8 and covers the design models for HAC, HAC CRFoS U, and HAC EDGE. The special
conditions like anchor channels installed in metal deck, two anchor channels installed parallel to
each other at an edge, anchor channels installed top and bottom of slab at the same elevation are
the few examples. This chapter also introduces and explains the design methodology of the anchor
channels used for high wind loads.
Design methods provided in chapter 9 are allowed for applications with known boundary conditions.
The provisions described in this section are only valid for Hilti Anchor Channels. The design models
presented in this chapter have not been evaluated with any other anchor channel type or anchoring
technology. For applications that deviate from the design boundary conditions presented in this
chapter, reach out to Hilti.
For fire protection requirements, the general building code may
require greater concrete cover than the required cover specified
in ACI 318-11 7.7.1 through 7.7.7.
For corrosive environments, the concrete cover shall be
increased as deemed necessary and specified by the licensed
design professional per the exposure categories and classed in
ACI 318-14 Section 19.3. The recommended cover for corrosive
environments is not less than 2 in for walls and slabs and not
less than 2-1/2 in. for other members.
10. Design
Software
Concrete exposure
9. Special Anchor
Channel Design
Concrete exposure
8. Reinforcing
Bar Anchorage
8.7 CONCRETE COVER
7. Anchor Channel
Design Code
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215