1. Anchor
Channel Systems
2. HAC
Portfolio
3. HAC
Applications
4. Design
Introduction
5. Base material
6. Loading
The following failure modes needs to be modified in order to
take account the effect of metal deck:
Pullout strength in tension
For FOS anchor channel design on a metal deck, the cover on
the rebar where the rebar goes on top of metal deck should be
measured from center of rebar to the metal deck. The c b value
is taken as minimum value of x 1 and x 2 in the development
length equation. The pullout strength gets reduced due to the
reduced cover if the ratio c b /d b is less than 2.5. Please refer
to rebar theory chapter 8 and section 9.2.3 chapters for more
information on this failure mode.
N P , R =
p . d
2
4
s , R
10
æ c d
ö 1
. l . f ' c . min ç , 2 . 5 ÷ .
3
è d b
ø y t . y e . y s
. s d = l d , prov . p . d b .
9. Special Anchor
Channel Design
10. Design
Software
11. Best
Practices
12. Instructions
for Use
13. Field Fixes
14. Design
Example
9.3.7 — H
AC CRFOS U DESIGN: DESIGN OF FACE OF SLAB ANCHOR
CHANNEL WITH COLUMN CONFLICT AT THE CORNER
Concrete breakout strength in shear
The dimension y” effects concrete breakout strength in
perpendicular shear. This will change the factor Ψ h,V .
The dimension h in the formula below for the Ψ h,V factor should
be taken as h as shown in Figure 9.3.5.1.
Please refer to anchor channel theory for more information on
concrete breakout in shear.
h
cr, V
= 2c a1 + 2h
æ
ö
h ÷
y h, V = ç ç
÷
h
cr,
V ø
è
ch
b 1
£ 1.0
10
æ c d
ö 1
. l . f ' c . min ç , 2 . 5 ÷ .
3
è d b
ø y t . y e . y s
When there is a column conflict at the corner, the anchor
channel is analyzed using a height of the base material as x” .
This dimension x” effects concrete breakout strength in
perpendicular shear Ψ h,V .
The dimension h in the formula below for the Ψ h,V factor should
be taken as h=x”.
Please refer to anchor channel theory for more information on
concrete breakout in shear.
h
cr, V
= 2c a1 + 2h
æ
(f y = ) s d = l d, prov . p . d b .
8. Reinforcing
Bar Anchorage
9.3.5 — HAC CRFOS U DESIGN: COMPOSITE SLABS
7. Anchor Channel
Design Code
ch
ö
h ÷
y h, V = ç ç
÷
è h cr, V ø
b 1
£ 1.0
Figure 9.3.6.1 — HAC CRFOS U — FOS — Column Conflict at Corner.
Figure 9.3.5.1 — HAC CRFOS U — FOS — Composite Slabs.
9.4 — HAC AND HAC-T DESIGN: POST TENSIONED SLABS
See best practices, section 11.5.3
Please contact Hilti at [email protected] for additional information.
AC CRFOS U DESIGN: DESIGN OF ANCHOR CHANNEL FOR
9.3.6 — H
OUTSIDE CORNER OF A CURB OR OUTSIDE CORNER WITH
COLUMN CONFLICT
9.5 — HAC CRFOS U DESIGN: POST TENSIONED SLABS
See best practices, section 11.5.3
282
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283