PROFIS Design Guide - AC 318-19 July 2022 | Page 139

1.0 TENSION

1.5 Steel Failure Mode
Variables A se , N
Variables ACI 318-19 Chapter 17 Provision Comments for PROFIS Engineering
A se , N
17.6.1.1 Nominal strength of anchors in tension as governed by the steel , N sa
, shall be evaluated based on the properties of the anchor material and the physical dimensions of the anchors .
17.6.1.2 Nominal steel strength of an anchor in tension , N sa , shall be calculated by
N sa
= A se , N ƒ uta
( 17.6.1.2 ) where A se , N is the effective cross-sectional area of an anchor in tension , in . 2 , and ƒ uta used for calculations shall not exceed either 1.9ƒ ya or 125,000 psi .
PROFIS Engineering cast-in-place anchor portfolio values for A se , N .
MATERIAL SPECIFICATION
AES D1.1
ASTM F 1554
ASTM F 1554
ASTM F 1554
GRADE OR TYPE
DIAMETER ( d 0
) ( in )
TENSILE STRENGTH ( ƒ uta
) ( ksi )
YIELD STRENGTH
( ƒ ya ) ( ksi )
GROSS AREA ( in 2 )
EFFECTIVE AREA ( A se
)
( in 2 )
B
0.500
65
51
0.196
B
0.625
65
51
0.307
B
0.750
65
51
0.442
B
0.875
65
51
0.601
36
0.500
58
36
0.196
0.142
36
0.625
58
36
0.307
0.226
36
0.750
58
36
0.442
0.334
36
0.875
58
36
0.601
0.462
36
1.000
58
36
0.785
0.606
36
1.125
58
36
0.994
0.763
36
1.250
58
36
1.227
0.969
36
1.375
58
36
1.485
1.160
36
1.500
58
36
1.767
1.410
36
1.750
58
36
2.405
1.900
36
2.000
58
36
3.142
2.500
55
0.500
75
55
0.196
0.142
55
0.625
75
55
0.307
0.226
55
0.750
75
55
0.442
0.334
55
0.875
75
55
0.601
0.462
55
1.000
75
55
0.785
0.606
55
1.125
75
55
0.994
0.763
55
1.250
75
55
1.227
0.969
55
1.375
75
55
1.485
1.160
55
1.500
75
55
1.767
1.410
55
1.750
75
55
2.405
1.900
55
2.000
75
55
3.142
2.500
105
0.500
125
105
0.196
0.142
105
0.625
125
105
0.307
0.226
105
0.750
125
105
0.442
0.334
105
0.875
125
105
0.601
0.462
105
1.000
125
105
0.785
0.606
105
1.125
125
105
0.994
0.763
105
1.250
125
105
1.227
0.969
105
1.375
125
105
1.485
1.160
105
1.500
125
105
1.767
1.410
105
1.750
125
105
2.405
1.900
105
2.000
125
105
3.142
2.500
ACI 318-19 Section 17.6.1.2 defines the parameter A se , N as “ the effective crosssectional area of an anchor in tension .” A se , N corresponds to the “ tensile stress area ” of an anchor element , which is calculated using the minor diameter of the element :
A se , N
= π ( d minor ) 2
The PROFIS Engineering cast-in-place anchor portfolio includes the following anchors :
• AWS D1.1 Type B headed studs ( 1 / 2 ” — 7 / 8 ” nominal diameter )
• ASTM F1554 hex head bolt , Gr . 36 , Gr . 55 , Gr . 105 ( 1 / 2 ” — 1-1 / 2 ” nominal diameter )
• ASTM F1554 heavy hex head bolt , Gr . 36 , Gr . 55 , Gr . 105 ( 1 / 2 ” — 2 ” nominal diameter )
• ASTM F1554 square head bolt , Gr . 36 , Gr . 55 , Gr . 105 ( 1 / 2 ” — 1-1 / 2 ” nominal diameter )
• ASTM F1554 heavy square head bolt , Gr . 36 , Gr . 55 , Gr . 105 ( 1 / 2 ” — 1-1 / 2 ” nominal diameter )
The table to the left shows the A se , N
-values for the PROFIS Engineering cast-inplace anchor portfolio . PROFIS Engineering uses these values to calculate N sa per
Equation ( 17.6.1.2 ).
Post-installed anchor ICC-ES evaluation reports ( ESR ’ s ) include pre-calculated values for the nominal steel strength of an anchor element ( N sa
). A se , N
-values may also be given in the ESR ; however , PROFIS Engineering uses the pre-calculated
N sa
-values instead of calculating N sa per Equation ( 17.6.1.2 ).
Reference the Calculations and Results section of the PROFIS Engineering report for more information on :
N sa
: nominal steel strength in tension .
Reference the Variables section of the PROFIS Engineering report for more information on :
ƒ uta
: ultimate tensile stress of an anchor element
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139 NORTH AMERICAN PROFIS ENGINEERING ANCHORING TO CONCRETE DESIGN GUIDE — ACI 318-19 Provisions