Installation Guide

14
December 2020
Table 20 — Load adjustment factors for Stainless Steel 1/4-in. diameter KB-TZ2 in uncracked concrete
1,2
1/4-in. KB-TZ2
uncracked concrete
Spacing factor in
tension
ƒ
AN
Edge distance
factor in tension
ƒ
RN
Spacing factor in
shear
3
ƒ
AV
Edge distance in shear
Conc. thickness
factor in shear
4
ƒ
HV
┴
Toward edge
ƒ
RV
‖
To edge
ƒ
RV
Effective Embedment
h
ef
in. 1-1/2 1-1/2 1-1/2 1-1/2 1-1/ 2 1-1/2
(mm) (38) (38) (38) (38) (38) (38)
Nominal Embedment
h
nom
in. 1-3/4 1-3/4 1-3/4 1-3/4 1-3/4 1-3/4
(mm) (44) (44) (44) (44) (44) (44)
Spacing (s) / Edge Distance (c
a
) /
Concrete Thickness (h) - in. (mm)
1-1/2 (38) 0.67 0.42 0.56 0.23 0.42 n/a
2 (51) 0.72 0.51 0.58 0.35 0.51 n/a
2-1/2 (64) 0.78 0.63 0.60 0.49 0.63 n/a
3 (76) 0.83 0.75 0.63 0.65 0.75 n/a
3-1/4 (83) 0.86 0.81 0.64 0.73 0.81 0.74
3-1/ 2 (89) 0.89 0.88 0.65 0.82 0.88 0.76
4 (102) 0.94 1.00 0.67 1.00 1.00 0.82
5 (127) 1.00 0.71 0.91
6 (152) 0.75 1.00
7 (178) 0.79
8 (203) 0.83
9 (229) 0.88
> 12 (305) 1.00
Table 21 — Load adjustment factors for Stainless Steel 1/4-in. diameter KB-TZ2 in cracked concrete
1,2
1/4-in. KB-TZ2
cracked concrete
Spacing factor in
tension
ƒ
AN
Edge distance
factor in tension
ƒ
RN
Spacing factor in
shear
3
ƒ
AV
Edge distance in shear
Conc. thickness
factor in shear
4
ƒ
HV
┴
Toward edge
ƒ
RV
‖
To edge
ƒ
RV
Effective Embedment
h
ef
in. 1-1/2 1-1/2 1-1/2 1-1/2 1-1/ 2 1-1/2
(mm) (38) (38) (38) (38) (38) (38)
Nominal Embedment
h
nom
in. 1-3/4 1-3/4 1-3/4 1-3/4 1-3/4 1-3/4
(mm) (44) (44) (44) (44) (44) (44)
Spacing (s) / Edge Distance (c
a
) /
Concrete Thickness (h) - in. (mm)
1-1/2 (38) 0.67 0.75 0.57 0.29 0.59 n/a
2 (51) 0.72 0.91 0.60 0.45 0.91 n/a
2-1/2 (64) 0.78 1.00 0.62 0.63 1.00 n/a
3 (76) 0.83 0.65 0.83 n/a
3-1/4 (83) 0.86 0.66 0.94 0.80
3-1/ 2 (89) 0.89 0.67 1.00 0.83
4 (102) 0.94 0.70 0.89
5 (127) 1.00 0.75 0.99
6 (152) 0.80 1.00
7 (178) 0.84
8 (203) 0.89
9 (229) 0.94
> 12 (305) 1.00
1 Linear interpolation not permitted
2 When combining multiple load adjustment factors (e.g. for a 4 anchor pattern in a corner with thin concrete member) the design can become very conservative.
To optimize the design, use Hilti PROFIS Engineering Design software or perform anchor calculation using design equations from ACI 318 Ch. 17 or CSA A23.3 Annex D.
3 Spacing factor reduction in shear, f
AV
, is applicable when edge distance c < 3h
ef
. If c ≥ 3h
ef
then f
AV
= f
AN
.
4 Concrete thickness reduction factor in shear, f
HV
, is applicable when edge distance c < 3h
ef
. If c ≥ 3h
ef
then f
HV
= 1.0.
If a reduction factor value is in a shaded cell, this indicates that this specific edge distance may not be permitted with a certain spacing (or vice versa). Check with Figure 2 and Table 5
(carbon steel) or Figure 3 and Table 19 (stainless steel) to calculate permissible edge distance, spacing and concrete thickness combinations.