Product Technical Guides : US-EN Anchor Fastening - August 2021 | Page 308

Table 8 — Load adjustment factors for Carbon Steel 3 / 8-in . diameter KB-TZ2 in uncracked concrete 1 , 2
3 / 8-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 factor
4 in shear
Effective Embedment
in .
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
h ef
( mm )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
Nominal Embedment
in .
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
h nom
( mm )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
ƒ HV
Spacing ( s ) / Edge Distance ( c a
) / Concrete Thickness ( h ) - in . ( mm )
2
( 51 )
n / a
n / a
0.63
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
2-1 / 4
( 57 )
n / a
0.69
0.65
n / a
n / a
n / a
n / a
0.59
0.55
n / a
n / a
n / a
n / a
n / a
n / a
n / a
n / a
n / a
2-1 / 2
( 64 )
n / a
0.71
0.67
n / a
0.60
0.51
n / a
0.60
0.55
n / a
0.43
0.18
n / a
0.60
0.37
n / a
n / a
n / a
3
( 76 )
n / a
0.75
0.70
n / a
0.69
0.58
n / a
0.61
0.56
n / a
0.57
0.24
n / a
0.69
0.48
n / a
n / a
n / a
3-1 / 4
( 83 )
n / a
0.77
0.72
n / a
0.74
0.61
n / a
0.62
0.57
n / a
0.64
0.27
n / a
0.74
0.54
0.66
n / a
n / a
3-1 / 2
( 89 )
n / a
0.79
0.73
n / a
0.80
0.65
n / a
0.63
0.58
n / a
0.72
0.30
n / a
0.80
0.61
0.68
n / a
n / a
4
( 102 )
n / a
0.83
0.77
n / a
0.91
0.73
n / a
0.65
0.59
n / a
0.87
0.37
n / a
0.91
0.73
0.73
0.78
n / a
5
( 127 )
1.00
0.92
0.83
1.00
1.00
0.91
0.67
0.69
0.61
1.00
1.00
0.52
1.00
1.00
0.91
0.82
0.87
0.66
6
( 152 )
1.00
1.00
0.90
1.00
1.00
0.70
0.73
0.63
1.00
0.68
1.00
1.00
0.89
0.96
0.72
8
( 203 )
1.00
1.00
1.00
0.77
0.80
0.67
1.00
1.00
1.00
1.00
1.00
0.83
12
( 305 )
0.90
0.96
0.76
1.00
18
( 457 )
1.00
1.00
0.89
> 24
( 610 )
1.00
Table 9 — Load adjustment factors for Carbon Steel 3 / 8-in . diameter KB-TZ2 in cracked concrete 1 , 2
3 / 8-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
┴ Toward edge
ƒ RV
‖ To edge
ƒ RV
Concrete thickness factor
4 in shear
Effective Embedment
in .
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
1-1 / 2
2
2-1 / 2
h ef
( mm )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
( 38 )
( 51 )
( 64 )
Nominal Embedment
in .
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
1-7 / 8
2-1 / 2
3
h nom
( mm )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
( 48 )
( 64 )
( 76 )
ƒ HV
Spacing ( s ) / Edge Distance ( c a
) / Concrete Thickness ( h ) - in . ( mm )
2
( 51 )
n / a
n / a
0.63
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
2-1 / 4
( 57 )
n / a
0.69
0.65
n / a
n / a
n / a
n / a
0.58
0.55
n / a
n / a
n / a
n / a
n / a
n / a
n / a
n / a
n / a
2-1 / 2
( 64 )
n / a
0.71
0.67
n / a
0.87
0.75
n / a
0.59
0.55
n / a
0.40
0.18
n / a
0.80
0.37
n / a
n / a
n / a
3
( 76 )
n / a
0.75
0.70
n / a
1.00
0.85
n / a
0.61
0.56
n / a
0.52
0.24
n / a
1.00
0.48
n / a
n / a
n / a
3-1 / 4
( 83 )
n / a
0.77
0.72
n / a
1.00
0.90
n / a
0.62
0.57
n / a
0.59
0.27
n / a
1.00
0.55
0.78
n / a
n / a
3-1 / 2
( 89 )
n / a
0.79
0.73
n / a
1.00
0.95
n / a
0.63
0.58
n / a
0.66
0.31
n / a
1.00
0.61
0.81
n / a
n / a
4
( 102 )
n / a
0.83
0.77
n / a
1.00
n / a
0.64
0.59
n / a
0.81
0.37
n / a
0.75
0.86
0.76
n / a
5
( 127 )
1.00
0.92
0.83
1.00
0.73
0.68
0.61
1.00
1.00
0.52
1.00
1.00
0.96
0.85
0.66
6
( 152 )
1.00
1.00
0.90
1.00
0.78
0.72
0.63
1.00
0.69
1.00
1.00
0.93
0.72
8
( 203 )
1.00
1.00
1.00
0.87
0.79
0.67
1.00
1.00
1.00
1.00
0.83
12
( 305 )
1.00
0.93
0.76
1.00
18
( 457 )
1.00
0.89
> 24
( 610 )
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 .
304 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