ACI-349 Approval for KB-TZ2 Expansion Anchor

Applicability of the KB-TZ2 Anchor
11
August 2021
Table 4 - Hilti carbon steel KB-TZ2 design information for hammer and core drilled installations, shear
3
Design
parameter
Symbol Units
Nominal anchor diameter (in)
1/4 3/8 1/2 5/8 3/4 1
Anchor O.D. d
a
in. 0.250 0.375 0.500 0.625 0.750 1.00
(mm) (6.4) (9.5) (12.7) (15.9) (19.1) (25.4)
Effective min.
embedment
1
h
ef
in. 1-1/2 1-1/2 2 2-1/2 1-1/2 2 2-1/2 3-1/4 2-3/4 3-1/4 4 3-1/4 3-3/4 4-3/4 4 5-3/4
(mm) (38) (38) (51) (64) (38) (51) (64) (83) (70) (83) (102) (83) (95) (121) (102) (146)
Shear, steel failure modes
Strength
reduction factor
for steel in shear
2
Φ
sa,V
- 0.75 0.75 0.75 0.75 0.75 0.75
Steel strength in
shear
V
sa
lb 1,345 3,225 3,385 5,535 6,875 10,255 13,805 18,795 22,825
(kN) (6.0) (14.4) (15.1) (24.6) (30.6) (45.6) (61.4) (83.6) (101.6)
Steel strength in
shear, seismic
V
sa,eq
lb 1,345 3,225 3,385 5,535 6,875 10,255 13,805 13,805
(kN) (6.0) (14.4) (15.1) (24.6) (30.6) (45.6) (61.4) (61.4)
Shear, concrete failure modes
Strength
reduction factor
for concrete
breakout and
pryout failure in
shear
Φ
c,V
, Φ
p,V
- 0.75 0.75 0.75 0.75 0.75 0.75
Load bearing
length of anchor
in shear
N
in. 1-1/2 1-1/2 2 2-1/2 1-1/2 2 2-1/2 3-1/4 2-3/4 3-1/4 4 3-1/4 3-3/4 4-3/4 4 5-3/4
(mm) (38) (38) (51) (64) (38) (51) (64) (83) (70) (83) (102) (83) (95) (121) (102) (146)
Coefficient for
pryout strength
k
cp
- 1 1 1 2 1 1 2 2 2 2 2 2 2 2 2 2
For SI: 1 inch = 25.4 mm, 1 lbf = 4.45 N, 1 psi = 0.006895 MPa. For pound-inch units: 1 mm = 0.03937 inches.
1
Figure 2 of this report illustrates the installation parameters.
2
The KB-TZ2 is considered a ductile steel element in accordance with ACI 349-01 Appendix B
3
1/4-inch and 1-inch diameter anchors are not permitted for core drilling installations.
Table 5 - Hilti stainless steel KB-TZ2 design information for hammer and core drilled installations, shear
3
Design
parameter
Symbol Units
Nominal anchor diameter (in)
1/4 3/8 1/2 5/8 3/4 1
Anchor O.D. d
a
in. 0.250 0.375 0.500 0.625 0.750 1.00
(mm) (6.4) (9.5) (12.7) (15.9) (19.1) (25.4)
Effective min.
embedment
1
h
ef
in. 1-1/2 1-1/ 2 2 2-1/2 2 2-1/2 3-1/4 2-3/4 3-1/4 4 3-1/4 3-3/4 4-3/4 4 5-3/4
(mm) (38) (38) (51) (64) (51) (64) (83) (70) (83) (102) (83) (95) (121) (102) (146)
Shear, steel failure modes
Strength
reduction factor
for steel in shear
2
Φ
sa,V
- 0.75 0.75 0.75 0.75 0.75 0.75
Steel strength in
shear
V
sa
lb 1,460 4,615 4,885 8,345 12,355 16,560 22,955 34,400
(kN) (6.5) (20.5) (21.7) (37.1) (55.0) (73.7) (102.1) (139.7)
Steel strength in
shear, seismic
V
sa,eq
lb 1,110 4,615 4,885 8,345 12,355 13,470 13,470
(kN) (4.9) (20.5) (21.7) (37.1) (55.0) (59.9) (59.9)
Shear, concrete failure modes
Strength
reduction factor
for concrete
breakout and
pryout failure in
shear
Φ
c,V
, Φ
p,V
- 0.75 0.75 0.75 0.75 0.75 0.75
Load bearing
length of anchor
in shear
N
in. 1-1/2 1-1/ 2 2 2-1/2 2 2-1/2 3-1/4 2-3/4 3-1/4 4 3-1/4 3-3/4 4-3/4 4 5-3/4
(mm) (38) (38) (51) (64) (51) (64) (83) (70) (83) (102) (83) (95) (121) (102) (146)
Coefficient for
pryout strength
k
cp
- 1 1 1 2 1 2 2 2 2 2 2 2 2 2 2
For SI: 1 inch = 25.4 mm, 1 lbf = 4.45 N, 1 psi = 0.006895 MPa. For pound-inch units: 1 mm = 0.03937 inches.
1
Figure 2 of this report illustrates the installation parameters.
2
The KB-TZ2 is considered a ductile steel element in accordance with ACI 349-01 Appendix B
3
1/4-inch and 1-inch diameter anchors are not permitted for core drilling installations.