Design parameter |
Symbol |
Units |
Nominal anchor diameter
1 / 4
3 / 8
|
Ref
A23.3
|
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Anchor O . D . |
d a
|
in .
( mm )
|
0.25
( 6.4 )
|
0.375
( 9.5 )
|
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Effective embedment 2
|
h ef
|
in .
( mm )
|
1.18
( 30 )
|
1.92
( 49 )
|
1.54
( 39 )
|
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Minimum nominal embedment 2
|
h nom
|
in .
( mm )
|
1-5 / 8
( 41 )
|
2-1 / 2
( 64 )
|
2 1 / 8
( 54 )
|
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Minimum concrete thickness |
h min
|
in .
( mm )
|
3-1 / 4
( 83 )
|
4-1 / 8
( 105 )
|
3 5 / 8
( 92 )
|
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Critical edge distance |
c ac
|
in .
( mm )
|
2.00
( 51 )
|
2.78
( 71 )
|
2.75
( 70 )
|
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Minimum spacing at critical edge distance |
s min , cac
|
in .
( mm )
|
1.5
( 38 )
|
2.25
( 57 )
|
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Minimum edge distance |
c min
|
in .
( mm )
|
1.50
( 38 )
|
1.5
( 38 )
|
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Minimum anchor spacing at minimum edge distance |
for s > |
in .
( mm )
|
3.0
( 76 )
|
3
( 76 )
|
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Mininimum hole depth in concrete |
h 0
|
in .
( mm )
|
2
( 51 )
|
2-7 / 8
( 73 )
|
2 3 / 8
( 60 )
|
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Minimum specified ultimate strength |
f uta
|
psi
( N / mm 2 )
|
125,000
( 862 )
|
106,975
( 826 )
|
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Effective tensile stress area |
A se , N
|
in 2
( mm 2 )
|
0.045
( 29.0 )
|
0.086
( 55.5 )
|
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Steel embed . material resistance factor for reinforcement |
ф s
|
- |
0.85 |
8.4.3 |
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Resistance modification factor for tension , steel failure modes 3
|
R |
- |
0.70 |
D . 5.3 |
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Resistance modification factor for shear , steel failure modes 3
|
R |
- |
0.65 |
D . 5.3 |
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Factored steel resistance in tension |
N sar
|
lb
( kN )
|
3,370
( 15.0 )
|
5,475
( 24.4 )
|
D . 6.1.2 |
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Factored steel resistance in shear |
1 / 4-20 UNC |
V sar
|
lb
( kN )
|
750
( 3.3 )
|
N / A |
D . 7.1.2 |
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Factored steel resistance in shear , seismic |
internal thread |
V sar , eq
|
lb
( kN )
|
335
( 1.5 )
|
N / A |
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Factored steel resistance in shear |
3 / 8-16 UNC |
V sar
|
lb
( kN )
|
725
( 3.2 )
|
N / A |
D . 7.1.2 |
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Factored steel resistance in shear , seismic |
internal thread |
V sar , eq
|
lb
( kN )
|
620
( 2.8 )
|
N / A |
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Factored steel resistance in shear
Factored steel resistance in shear , seismic
|
1 / 2-13 UNC internal thread |
V sar
V sar , eq
|
lb
( kN ) lb
( kN )
|
N / A |
1040
( 4.6 )
1040
( 4.6 )
|
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Coeff . for factored conc . breakout resistance , uncracked concrete |
k c , uncr
|
- |
10 |
D . 6.2.2 |
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Coeff . for factored conc . breakout resistance , cracked concrete |
k c , cr
|
- |
7 |
D . 6.2.2 |
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Modification factor for anchor resistance , tension , uncracked conc . 4
|
ψ c , N
|
- |
1.0 |
D . 6.2.6 |
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Anchor category |
- |
- |
3 |
1 |
1 |
D . 5.3 ( c ) |
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Concrete material resistance factor |
ф c
|
- |
0.65 |
8.4.2 |
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Resistance modification factor for tension and shear , concrete failure modes , Condition B 5
|
R |
- |
0.75 |
1.00 |
1.00 |
D . 5.3 ( c ) |
Factored pullout resistance in 20 MPa uncracked concrete 6
|
N pr , uncr
|
lb
( kN )
|
665
( 3.0 )
|
1,645
( 7.3 )
|
Factored pullout resistance in 20 MPa cracked concrete 6
|
N pr , cr
|
lb
( kN )
|
340
( 1.5 )
|
815
( 3.6 )
|
Factored seismic pullout resistance in 20 MPa cracked concrete 6
|
N pr , eq
|
lb
( kN )
|
275
( 1.2 )
|
815
( 3.6 )
|