Product Technical Guides : CA-EN Anchor Fastening - Volume 2 Edition 21 | Page 59

Anchor Fastening Technical Guide , Edition 22
Table 34 — Load adjustment factors for # 9 rebar in uncracked concrete 1 , 2 , 3
Edge distance in shear
# 9 Rebar uncracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 4
ƒ AV
┴ Toward edge
ƒ RV
⃦ To and away from edge
ƒ RV
Concrete thickness factor in shear 5
Embedment h ef
in .
( mm )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.22
0.16
0.10
n / a
n / a
n / a
0.02
0.01
0.01
0.04
0.02
0.01
n / a
n / a
n / a
5-5 / 8
( 143 )
0.59
0.57
0.54
0.31
0.23
0.13
0.54
0.53
0.52
0.11
0.07
0.03
0.22
0.14
0.07
n / a
n / a
n / a
6
( 152 )
0.60
0.57
0.54
0.32
0.23
0.14
0.54
0.53
0.52
0.12
0.08
0.04
0.24
0.16
0.07
n / a
n / a
n / a
7
( 178 )
0.62
0.59
0.55
0.34
0.25
0.15
0.55
0.54
0.52
0.15
0.10
0.05
0.30
0.20
0.09
n / a
n / a
n / a
8
( 203 )
0.63
0.60
0.56
0.37
0.27
0.16
0.55
0.54
0.52
0.18
0.12
0.06
0.37
0.24
0.11
n / a
n / a
n / a
9
( 229 )
0.65
0.61
0.57
0.40
0.29
0.17
0.56
0.55
0.53
0.22
0.14
0.07
0.41
0.29
0.14
n / a
n / a
n / a
10
( 254 )
0.66
0.62
0.57
0.42
0.31
0.18
0.57
0.55
0.53
0.26
0.17
0.08
0.44
0.33
0.16
n / a
n / a
n / a
11
( 279 )
0.68
0.64
0.58
0.45
0.33
0.19
0.57
0.56
0.53
0.30
0.19
0.09
0.46
0.38
0.19
n / a
n / a
n / a
12
( 305 )
0.70
0.65
0.59
0.48
0.35
0.20
0.58
0.56
0.54
0.34
0.22
0.11
0.49
0.40
0.21
n / a
n / a
n / a
12-7 / 8
( 327 )
0.71
0.66
0.60
0.51
0.37
0.22
0.59
0.57
0.54
0.38
0.24
0.12
0.52
0.42
0.23
0.59
n / a
n / a
13
( 330 )
0.71
0.66
0.60
0.51
0.37
0.22
0.59
0.57
0.54
0.38
0.25
0.12
0.52
0.42
0.24
0.59
n / a
n / a
14
( 356 )
0.73
0.67
0.60
0.54
0.39
0.23
0.59
0.57
0.54
0.43
0.28
0.13
0.55
0.44
0.27
0.61
n / a
n / a
16
( 406 )
0.76
0.70
0.62
0.62
0.45
0.26
0.61
0.58
0.55
0.52
0.34
0.16
0.62
0.48
0.33
0.66
n / a
n / a
16-1 / 4
( 413 )
0.77
0.70
0.62
0.63
0.46
0.27
0.61
0.58
0.55
0.53
0.35
0.17
0.63
0.48
0.33
0.66
0.57
n / a
18
( 457 )
0.80
0.72
0.63
0.69
0.51
0.30
0.62
0.59
0.56
0.62
0.40
0.19
0.69
0.52
0.37
0.70
0.60
n / a
20
( 508 )
0.83
0.75
0.65
0.77
0.56
0.33
0.63
0.60
0.56
0.73
0.47
0.23
0.77
0.56
0.39
0.73
0.64
n / a
22
( 559 )
0.86
0.77
0.66
0.85
0.62
0.36
0.65
0.61
0.57
0.84
0.55
0.26
0.85
0.62
0.41
0.77
0.67
n / a
24
( 610 )
0.90
0.80
0.68
0.93
0.68
0.40
0.66
0.62
0.57
0.96
0.62
0.30
0.93
0.68
0.43
0.80
0.70
n / a
25-1 / 4
( 641 )
0.92
0.81
0.69
0.97
0.71
0.42
0.67
0.63
0.58
1.00
0.67
0.32
0.97
0.71
0.45
0.83
0.71
0.56
26
( 660 )
0.93
0.82
0.69
1.00
0.73
0.43
0.68
0.63
0.58
0.70
0.34
1.00
0.73
0.46
0.84
0.73
0.57
28
( 711 )
0.96
0.85
0.71
0.79
0.46
0.69
0.64
0.59
0.78
0.38
0.79
0.48
0.87
0.75
0.59
30
( 762 )
0.99
0.87
0.72
0.84
0.49
0.70
0.65
0.59
0.87
0.42
0.84
0.51
0.90
0.78
0.61
36
( 914 )
1.00
0.94
0.77
1.00
0.59
0.74
0.68
0.61
1.00
0.55
1.00
0.59
0.99
0.85
0.67
> 48
( 1219 )
1.00
0.86
0.79
0.82
0.74
0.65
0.84
0.79
1.00
0.99
0.77
Spacing ( s ) / Edge distance ( c a ) / Concrete thickness ( h ), - in . ( mm ) ƒ HV
3.2.2
Table 35 — Load adjustment factors for # 9 rebar in cracked concrete 1 , 2 , 3
# 9 Rebar cracked concrete
Spacing factor in tension
ƒ AN
Edge distance factor in tension
ƒ RN
Spacing factor in shear 4
ƒ AV
┴ Toward edge
ƒ RV
Edge distance in shear
⃦ To and away from edge
ƒ RV
Concrete thickness factor in shear 5
Embedment h ef
in .
( mm )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
10-1 / 8
( 257 )
13-1 / 2
( 343 )
22-1 / 2
( 572 )
1-3 / 4
( 44 )
n / a
n / a
n / a
0.41
0.39
0.38
n / a
n / a
n / a
0.02
0.01
0.01
0.04
0.03
0.02
n / a
n / a
n / a
5-5 / 8
( 143 )
0.59
0.57
0.54
0.56
0.50
0.44
0.54
0.53
0.52
0.11
0.07
0.04
0.22
0.15
0.09
n / a
n / a
n / a
6
( 152 )
0.60
0.57
0.54
0.57
0.51
0.44
0.54
0.53
0.52
0.12
0.08
0.05
0.24
0.16
0.10
n / a
n / a
n / a
7
( 178 )
0.62
0.59
0.55
0.61
0.54
0.46
0.55
0.54
0.53
0.15
0.10
0.06
0.30
0.21
0.12
n / a
n / a
n / a
8
( 203 )
0.63
0.60
0.56
0.65
0.57
0.48
0.55
0.54
0.53
0.19
0.13
0.08
0.37
0.25
0.15
n / a
n / a
n / a
9
( 229 )
0.65
0.61
0.57
0.70
0.60
0.49
0.56
0.55
0.53
0.22
0.15
0.09
0.44
0.30
0.18
n / a
n / a
n / a
10
( 254 )
0.66
0.62
0.57
0.74
0.63
0.51
0.57
0.55
0.54
0.26
0.18
0.11
0.52
0.35
0.21
n / a
n / a
n / a
11
( 279 )
0.68
0.64
0.58
0.79
0.67
0.53
0.57
0.56
0.54
0.30
0.20
0.12
0.60
0.40
0.24
n / a
n / a
n / a
12
( 305 )
0.70
0.65
0.59
0.84
0.70
0.55
0.58
0.56
0.54
0.34
0.23
0.14
0.68
0.46
0.28
n / a
n / a
n / a
12-7 / 8
( 327 )
0.71
0.66
0.60
0.88
0.73
0.56
0.59
0.57
0.55
0.38
0.26
0.15
0.76
0.51
0.31
0.59
n / a
n / a
13
( 330 )
0.71
0.66
0.60
0.89
0.73
0.56
0.59
0.57
0.55
0.39
0.26
0.16
0.77
0.52
0.31
0.59
n / a
n / a
14
( 356 )
0.73
0.67
0.60
0.94
0.77
0.58
0.60
0.57
0.55
0.43
0.29
0.17
0.86
0.58
0.35
0.62
n / a
n / a
16
( 406 )
0.76
0.70
0.62
1.00
0.84
0.62
0.61
0.58
0.56
0.53
0.36
0.21
1.00
0.71
0.43
0.66
n / a
n / a
16-1 / 4
( 413 )
0.77
0.70
0.62
0.85
0.63
0.61
0.58
0.56
0.54
0.36
0.22
0.73
0.44
0.66
0.58
n / a
18
( 457 )
0.80
0.72
0.63
0.91
0.66
0.62
0.59
0.57
0.63
0.42
0.25
0.85
0.51
0.70
0.61
n / a
20
( 508 )
0.83
0.75
0.65
0.99
0.70
0.64
0.60
0.57
0.73
0.50
0.30
0.99
0.60
0.74
0.65
n / a
22
( 559 )
0.86
0.77
0.66
1.00
0.74
0.65
0.61
0.58
0.85
0.57
0.34
1.00
0.69
0.77
0.68
n / a
24
( 610 )
0.90
0.80
0.68
0.78
0.66
0.63
0.59
0.97
0.65
0.39
0.78
0.81
0.71
n / a
25-1 / 4
( 641 )
0.92
0.81
0.69
0.81
0.67
0.63
0.59
1.00
0.70
0.42
0.81
0.83
0.73
0.61
26
( 660 )
0.93
0.82
0.69
0.82
0.68
0.64
0.60
0.74
0.44
0.82
0.84
0.74
0.62
28
( 711 )
0.96
0.85
0.71
0.87
0.69
0.65
0.60
0.82
0.49
0.87
0.87
0.76
0.65
30
( 762 )
0.99
0.87
0.72
0.91
0.70
0.66
0.61
0.91
0.55
0.91
0.90
0.79
0.67
36
( 914 )
1.00
0.94
0.77
1.00
0.74
0.69
0.63
1.00
0.72
1.00
0.99
0.87
0.73
> 48
( 1219 )
1.00
0.86
0.83
0.75
0.68
1.00
1.00
1.00
0.84
Spacing ( s ) / Edge distance ( c a
) / Concrete thickness ( h ), - in . ( mm )
1 Linear interpolation not permitted . 2 Shaded area with reduced edge distance is permitted provided rebar has no installation torque . 3 When combining multiple load adjustment factors ( e . g . for a four-anchor pattern in a corner with thin concrete member ) the design can become very conservative . To optimize the design , use
PROFIS Engineering or perform anchor calculation using design equations from ACI 318 Chapter 17 . 4 Spacing factor reduction in shear applicable when c < 3 * h ef
. ƒ AV , is applicable when edge distance , c < 3 * h ef
. If c ≥ 3 * h ef , then ƒ AV
= ƒ AN .
5 Concrete thickness reduction factor in shear , ƒ HV , is applicable when edge distance , c < 3 * h ef
. If c ≥ 3 * h ef , then ƒ HV
= 1.0 . ƒ HV
Anchor Fastening Technical Guide Edition 22 | 3.0 ANCHORING SYSTEMS | 3.2.2 HILTI HIT-HY 200 A / R V3 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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