Anchor Fastening Technical Guide , Edition 22
Table 10 — Load adjustment factors for Carbon Steel 1 / 2-in . diameter KB-TZ2 in uncracked concrete 1 , 2
1 / 2-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
┴ Toward edge
ƒ RV
‖ To edge
ƒ RV
Concrete thickness
4 factor in shear ƒ HV
Effective Embedment
h ef
Nominal Embedment
h nom
Spacing ( s ) / Edge Distance ( c a
) /
Concrete Thickness ( h ) - in . ( mm ) in . 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 ( mm ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) in . 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 ( mm ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 )
2 ( 51 ) n / a n / a n / a 0.60 n / a n / a n / a n / a n / a n / a n / a 0.53 n / a n / a n / a n / a n / a n / a n / a n / a n / a n / a n / a n / a 2-1 / 4 ( 57 ) n / a n / a n / a 0.62 n / a n / a n / a 0.30 n / a n / a n / a 0.54 n / a n / a n / a 0.11 n / a n / a n / a 0.21 n / a n / a n / a n / a 2-3 / 4 ( 70 ) n / a n / a n / a 0.64 n / a 0.51 0.44 0.33 n / a n / a n / a 0.55 n / a 0.35 0.23 0.14 n / a 0.51 0.44 0.29 n / a n / a n / a n / a
3 ( 76 ) n / a n / a 0.70 0.65 n / a 0.55 0.47 0.35 n / a n / a 0.57 0.55 n / a 0.40 0.26 0.16 n / a 0.55 0.47 0.33 n / a n / a n / a n / a 3-1 / 4 ( 83 ) n / a n / a 0.72 0.67 n / a 0.59 0.50 0.37 n / a n / a 0.57 0.55 n / a 0.45 0.30 0.19 n / a 0.59 0.50 0.37 0.52 n / a n / a n / a 3-1 / 2 ( 89 ) n / a 0.79 0.73 0.68 n / a 0.64 0.53 0.38 n / a 0.61 0.58 0.56 n / a 0.51 0.33 0.21 n / a 0.64 0.53 0.38 0.54 n / a n / a n / a
4 ( 102 ) n / a 0.83 0.77 0.71 n / a 0.73 0.59 0.42 n / a 0.62 0.59 0.57 n / a 0.62 0.40 0.25 n / a 0.73 0.59 0.42 0.58 0.70 n / a n / a 4-3 / 4 ( 121 ) n / a 0.90 0.82 0.74 n / a 0.86 0.70 0.48 n / a 0.64 0.61 0.58 n / a 0.80 0.52 0.33 n / a 0.86 0.70 0.48 0.63 0.76 n / a n / a
5 ( 127 ) n / a 0.92 0.83 0.76 n / a 0.91 0.74 0.50 n / a 0.65 0.61 0.58 n / a 0.87 0.56 0.35 n / a 0.91 0.74 0.50 0.65 0.78 0.67 n / a 5-1 / 4 ( 133 ) n / a 0.94 0.85 0.77 n / a 0.95 0.78 0.53 n / a 0.66 0.62 0.59 n / a 0.93 0.61 0.38 n / a 0.95 0.78 0.53 0.66 0.80 0.69 n / a 5-1 / 2 ( 140 ) n / a 0.96 0.87 0.78 n / a 1.00 0.81 0.55 n / a 0.67 0.63 0.59 n / a 1.00 0.65 0.41 n / a 1.00 0.81 0.55 0.68 0.82 0.71 0.61 6 ( 152 ) n / a 1.00 0.90 0.81 n / a 1.00 0.89 0.60 n / a 0.68 0.64 0.60 n / a 1.00 0.74 0.46 n / a 1.00 0.89 0.60 0.71 0.85 0.74 0.63 8 ( 203 ) n / a 1.00 0.91 1.00 1.00 1.00 0.80 n / a 0.74 0.68 0.63 1.00 1.00 1.00 0.72 1.00 1.00 1.00 0.80 0.82 0.98 0.85 0.73 9-3 / 4 ( 248 ) n / a 1.00 1.00 1.00 0.98 n / a 0.80 0.72 0.66 1.00 0.96 1.00 0.98 0.90 1.00 0.94 0.81 10 ( 254 ) n / a 1.00 1.00 n / a 0.80 0.73 0.67 1.00 1.00 1.00 1.00 0.91 0.95 0.82 12 ( 305 ) 1.00 0.75 0.86 0.77 0.70 1.00 1.00 0.89 24 ( 610 ) 1.00 1.00 1.00 0.90 1.00 > 30 ( 762 ) 1.00
3.3.5
Table 11 — Load adjustment factors for Carbon Steel 1 / 2-in . diameter KB-TZ2 in cracked concrete 1 , 2
1 / 2-in . KB-TZ2 cracked concrete
Effective Embedment
h ef
Nominal Embedment
h nom
Spacing ( s ) / Edge Distance ( c a
) / Concrete Thickness ( h ) - in . ( mm )
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 3
ƒ AV
Edge distance in shear
┴ Toward edge
ƒ RV
‖ To edge
ƒ RV
Concrete thickness
4 factor in shear
in . 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 1-1 / 2 2 2-1 / 2 3-1 / 4 ( mm ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) ( 38 ) ( 51 ) ( 64 ) ( 83 ) in . 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 2 2-1 / 2 3 3-3 / 4 ( mm ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 ) ( 51 ) ( 64 ) ( 76 ) ( 95 )
2 ( 51 ) n / a n / a n / a 0.60 n / a n / a n / a n / a n / a n / a n / a 0.54 n / a n / a n / a n / a n / a n / a n / a n / a n / a n / a n / a n / a 2-1 / 4 ( 57 ) n / a n / a n / a 0.62 n / a n / a n / a 0.61 n / a n / a n / a 0.54 n / a n / a n / a 0.12 n / a n / a n / a 0.24 n / a n / a n / a n / a 2-3 / 4 ( 70 ) n / a n / a n / a 0.64 n / a 0.93 0.80 0.68 n / a n / a n / a 0.55 n / a 0.50 0.19 0.16 n / a 0.93 0.38 0.33 n / a n / a n / a n / a
3 ( 76 ) n / a n / a 0.70 0.65 n / a 1.00 0.85 0.71 n / a n / a 0.56 0.55 n / a 0.57 0.21 0.19 n / a 1.00 0.43 0.38 n / a n / a n / a n / a 3-1 / 4 ( 83 ) n / a n / a 0.72 0.67 n / a 1.00 0.90 0.75 n / a n / a 0.56 0.56 n / a 0.64 0.24 0.21 n / a 1.00 0.48 0.42 0.76 n / a n / a n / a 3-1 / 2 ( 89 ) n / a 0.79 0.73 0.68 n / a 1.00 0.95 0.79 n / a 0.63 0.57 0.56 n / a 0.72 0.27 0.24 n / a 1.00 0.54 0.47 0.79 n / a n / a n / a
4 ( 102 ) n / a 0.83 0.77 0.71 n / a 1.00 1.00 0.86 n / a 0.65 0.58 0.57 n / a 0.88 0.33 0.29 n / a 1.00 0.66 0.58 0.85 0.78 n / a n / a 4-3 / 4 ( 121 ) n / a 0.90 0.82 0.74 n / a 1.00 1.00 0.98 n / a 0.68 0.59 0.59 n / a 1.00 0.43 0.37 n / a 1.00 0.85 0.75 0.92 0.85 n / a n / a
5 ( 127 ) n / a 0.92 0.83 0.76 n / a 1.00 1.00 1.00 n / a 0.69 0.60 0.59 n / a 1.00 0.46 0.40 n / a 1.00 0.92 0.81 0.95 0.87 0.63 n / a 5-1 / 4 ( 133 ) n / a 0.94 0.85 0.77 n / a 1.00 1.00 n / a 0.70 0.60 0.60 n / a 1.00 0.49 0.43 n / a 1.00 0.99 0.87 0.97 0.90 0.65 n / a 5-1 / 2 ( 140 ) n / a 0.96 0.87 0.78 n / a 1.00 1.00 n / a 0.71 0.61 0.60 n / a 1.00 0.53 0.47 n / a 1.00 1.00 0.93 0.99 0.92 0.66 0.63 6 ( 152 ) n / a 1.00 0.90 0.81 n / a 1.00 1.00 n / a 0.73 0.62 0.61 n / a 1.00 0.60 0.53 n / a 1.00 1.00 1.00 1.00 0.96 0.69 0.66 8 ( 203 ) n / a 1.00 0.91 1.00 1.00 1.00 n / a 0.81 0.66 0.65 1.00 1.00 0.93 0.82 1.00 1.00 1.00 1.00 0.80 0.76 9-3 / 4 ( 248 ) n / a 1.00 1.00 1.00 n / a 0.87 0.69 0.68 1.00 1.00 1.00 1.00 0.88 0.84 10 ( 254 ) n / a 1.00 n / a 0.88 0.70 0.68 1.00 1.00 0.89 0.85 12 ( 305 ) 1.00 1.00 0.96 0.74 0.72 0.98 0.94 24 ( 610 ) 1.00 0.98 0.94 1.00 1.00 > 30 ( 762 ) 1.00 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 to calculate permissible edge distance , spacing and concrete thickness combinations . ƒ HV
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.3.5 KWIK BOLT TZ2 EXPANSION ANCHOR Hilti , Inc . 1-800-879-8000 | en español 1-800-879-5000 | www . hilti . com | Hilti ( Canada ) Corporation | www . hilti . ca | 1-800-363-4458
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