
Notice: Unless otherwise noted, all load and design values presented herein are based on the provisions of ACI 34997 or earlier. Design guidance based on ACI 31805 and ACI 34906 is being prepared and will appear here shortly. In the mean time you may wish to review the results of cracked concrete testing performed in accordance with ACI 355.2 as called for in the new codes.
Anchor Diameter (Inches) 
Tension (Pounds) 
Shear Case 1 (Pounds) 
Shear Case 2 (Pounds) 
1/4  1,600  830  1,060 
3/8  3,900  2,025  2,580 
1/2  7,105  3,690  4,695 
5/8  11,305  5,870  7,475 
3/4  16,710  8,680  11,045 
1  30,315  15,750  20,040 
1 1/4  50,015  25,980  33,065 
1. Shear Case 1 applicable for grouted plates. Shear Case 2 applicable for plates in contact with concrete surface.
2. Use straight line interaction for combined tension and shear loading.
3. All load allowables are premised on the concrete's ability to develop 100 percent of the stud bolt's minimum ultimate capacity. Applicable code provisions should be employed to determine the design strength of overlying concrete for particular anchor spacing and embedment combinations. Since most codes base the design strength of concrete on the combined projected areas of all bolts in a given pattern, Drillco has provided a Projected Concrete Area Calculator to assist in concrete strength calculations. Note that codes differ on the question of permitting reduced load allowables in cases where the design strength of concrete is less than the bolt's specified minimum ultimate strength.
4. The allowable loads noted in the above table may be assigned to each anchor in a multipleanchor attachment. A single anchor used to anchor an attachment shall be designed for one half of the allowable loads noted. A single anchor is considered to be an anchor with no capability to redistribute its load to adjacent anchors.

STUD DIAMETER (Inches) 
ATTACHMENT THICKNESS (Inches) 
(Inches) 




Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 

MB2504 1/42
MB2504 1/42 3/4 
1/4 
1.00 
2 3/4 
6.00 
4.50 
5.00 
4.25 
4.50 
4.00 
MB37563 1/2
MB37564 1/2 
3/8 
1.50 
4 1/2 
9.00 
6.75 
7.50 
6.25 
6.50 
6.00 
MB5008 1/46
MB50011 1/48 MB50013 1/410 
1/2 1/2 
2.00 2.00 
8 10 
8.50 6.00 
8.75 8.75 
7.00 4.50 
8.25 8.25 
6.00 4.00 
7.75 7.75 
MB625107 1/2
MB625139 1/2 MB6251612 
5/8 5/8 
2.25 2.75 
9 1/2 12 
11.50 8.00 
11.00 11.00 
9.50 6.50 
10.25 10.25 
8.50 5.50 
9.75 9.75 
MB75013 1/29 1/4
MB75016 1/211 1/2 MB75018 1/213 
3/4 3/4 
3.50 4.00 
11 1/2 13 
14.00 12.00 
13.00 13.00 
12.00 10.00 
12.25 12.25 
10.50 8.50 
11.75 11.75 
MB100016 1/212 1/2
MB100022 1/216 1/2 MB100026 1/220 1/2 
1 1 
3.50 3.50 
16 1/2 20 1/2 
17.00 12.00 
17.50 17.50 
14.50 9.50 
16.25 16.25 
12.50 7.50 
15.50 15.50 
MB12502016
MB12503023 MB12503729 1/2 
1 1/4 1 1/4 
5.00 5.50 
23 29 1/2 
19.50 12.00 
22.00 22.00 
16.00 8.50 
20.50 20.50 
14.00 6.50 
19.25 19.25 
*Recommendation based on independent laboratory testing. All other embedment and center to center recommendations based on design by analysis provisions of ACI 349. Appendix B.
NOTES:
1. Maximum attachment thickness is based on torque tensioning of anchor. Any lesser attachment thickness may be used. Where the anchor is to be hydraulically tensioned, maximum attachment thicknesses will be reduced by one stud diameter.
2. Consideration of stress area reduction for limited concrete depth is not reflected in the above table. Minimum concrete depth = anchor embedment plus (centertocenter spacing/2).
3. MaxiBolt part numbers are specified as follows: MBDiameter Series Number  Overall LengthSleeve Length (combined expansion sleeve and distance tube lengths).
4. Minimum edge distances quoted are for shear or combined tension and shear. For tension loading, edge distance may be reduced to 75 percent of given value.
5. Allowable values are limited to a maximum of six bolts in a tworow, threecolumn, or threerow, twocolumn arrangement. Allowable values may also be used for anchors placed in a single line and separated from other anchor lines by a minimum distance of two times the anchor embedment length.
6. Inplace embedment length is determined by subtracting the overall length (second number shown in Anchor Part No. column) from the exposed projection.
Anchor Diameter (Inches) 
Tension (Pounds) 
Shear Case 1 (Pounds) 
Shear Case 2 (Pounds) 
3/8  1,335  690  880 
1/2  2,435  1,265  1,610 
5/8  3,875  2,010  2,560 
3/4  5,725  2,975  3,785 
1  10,390  5,395  6,870 
1 1/4  17,150  8,910  11,340 
1. Shear Case 1 applicable for grouted plates. Shear Case 2 applicable for plates in contact with concrete surface.
2. Use straight line interaction for combined tension and shear loading.
3. All load allowables are premised on the concrete's ability to develop 100 percent of the stud bolt's minimum ultimate capacity. Applicable code provisions should be employed to determine the design strength of overlying concrete for particular anchor spacing and embedment combinations. Since most codes base the design strength of concrete on the combined projected areas of all bolts in a given pattern, Drillco has provided a Projected Concrete Area Calculator to assist in concrete strength calculations. Note that codes differ on the question of permitting reduced load allowables in cases where the design strength of concrete is less than the bolt's specified minimum ultimate strength.
4. The allowable loads noted in the above table may be assigned to each anchor in a multipleanchor attachment. A single anchor used to anchor an attachment shall be designed for one half of the allowable loads noted. A single anchor is considered to be an anchor with no capability to redistribute its load to adjacent anchors.

STUD DIAMETER (Inches) 
ATTACHMENT THICKNESS (Inches) 
(Inches) 




Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 

MBA3637563 1/4  3/8  2  3 1/4  6.00  4.50  6.00  4.25  4.00  4.00 
MBA3637564 1/2  3/8  1  4 1/2  4.00  4.50  4.00  4.25  4.00  4.00 
MBA3650074 1/2  1/2  1 3/4  4 1/2  8.00  6.00  6.00  5.75  6.00  5.25 
MBA3650096  1/2  2 1/4  6  6.00  6.00  4.00  5.75  4.00  5.25 
MBA36500107  1/2  2 1/4  7  4.00  6.00  4.00  5.75  4.00  5.25 
MBA3662585 1/2  5/8  1 3/4  5 1/2  10.00  7.50  8.00  7.00  8.00  6.75 
MBA36625107 1/2  5/8  1 3/4  7 1/2  8.00  7.50  6.00  7.00  4.00  6.75 
MBA36625118  5/8  2 1/4  8  6.00  7.50  6.00  7.00  4.00  6.75 
MBA36750107  3/4  2  7  12.00  9.00  10.00  8.50  8.00  8.00 
MBA36750139  3/4  3  9  8.00  9.00  8.00  8.50  6.00  8.00 
MBA367501410 1/2  3/4  3 1/2  10 1/2  6.00  9.00  6.00  8.50  4.00  8.00 
MBA361000139  1  2 3/4  9  16.00  12.00  14.00  11.25  12.00  10.50 
MBA3610001612  1  2 3/4  12  12.00  12.00  10.00  11.25  8.00  10.50 
MBA3610001814  1  2 3/4  14  8.00  12.00  8.00  11.25  6.00  10.50 
MBA3612501612  1 1/4  2 3/4  12  18.00  15.00  16.00  14.00  14.00  13.25 
MBA3612501814  1 1/4  2 3/4  14  16.00  15.00  14.00  14.00  12.00  13.25 
MBA3612502319  1 1/4  2 3/4  19  10.00  15.00  10.00  14.00  8.00  13.25 
*Recommendation based on independent laboratory testing. All other embedment and center to center recommendations based on design by analysis provisions of ACI 349. Appendix B.
NOTES:
1. Maximum attachment thickness is based on torque tensioning of anchor. Any lesser attachment thickness may be used. Where the anchor is to be hydraulically tensioned, maximum attachment thicknesses will be reduced by one stud diameter.
2. Consideration of stress area reduction for limited concrete depth is not reflected in the above table. Minimum concrete depth = anchor embedment plus (centertocenter spacing/2).
3. MaxiBolt part numbers are specified as follows: MBDiameter Series Number  Overall LengthSleeve Length (combined expansion sleeve and distance tube lengths).
4. Minimum edge distances quoted are for shear or combined tension and shear. For tension loading, edge distance may be reduced to 75 percent of given value.
5. Allowable values are limited to a maximum of six bolts in a tworow, threecolumn, or threerow, twocolumn arrangement. Allowable values may also be used for anchors placed in a single line and separated from other anchor lines by a minimum distance of two times the anchor embedment length.
6. Inplace embedment length is determined by subtracting the overall length (second number shown in Anchor Part No. column) from the exposed projection.
Anchor Diameter (Inches) 
Tension (Pounds) 
Shear Case 1 (Pounds) 
Shear Case 2 (Pounds) 
3/8  1,105  575  730 
1/2  2,025  1,050  1,340 
5/8  3,230  1,675  2,135 
3/4  4,780  2,480  3,160 
1  8,655  4,495  5,720 
1 1/4  14,290  7,420  9,445 
1. Shear Case 1 applicable for grouted plates. Shear Case 2 applicable for plates in contact with concrete surface.
2. Use straight line interaction for combined tension and shear loading.
3. All load allowables are premised on the concrete's ability to develop 100 percent of the stud bolt's minimum ultimate capacity. Applicable code provisions should be employed to determine the design strength of overlying concrete for particular anchor spacing and embedment combinations. Since most codes base the design strength of concrete on the combined projected areas of all bolts in a given pattern, Drillco has provided a Projected Concrete Area Calculator to assist in concrete strength calculations. Note that codes differ on the question of permitting reduced load allowables in cases where the design strength of concrete is less than the bolt's specified minimum ultimate strength.
4. The allowable loads noted in the above table may be assigned to each anchor in a multipleanchor attachment. A single anchor used to anchor an attachment shall be designed for one half of the allowable loads noted. A single anchor is considered to be an anchor with no capability to redistribute its load to adjacent anchors.

STUD DIAMETER (Inches) 
ATTACHMENT THICKNESS (Inches) 
(Inches) 




Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 

SAMB37563 1/2  3/8  2.50  3 1/2  6.50  5.25  5.50  4.75  5.00  4.50 
SAMB37564 1/2  3/8  1.50  4 1/2  5.00  5.25  4.00  4.75  4.00  4.50 
SAMB50085  1/2  2.00  5  8.50  7.00  7.00  6.50  6.50  6.00 
SAMB500106 1/2  1/2  2.50  6 1/2  6.00  7.00  6.00  6.50  6.00  6.00 
SAMB625106  5/8  2.75  6  11.00  8.50  9.50  8.00  8.50  7.50 
SAMB625128  5/8  2.75  8  8.00  8.50  8.00  8.00  6.00  7.50 
SAMB750117  3/4  2.50  7  14.50  10.25  12.00  9.50  10.50  9.00 
SAMB750139 1/2  3/4  2.00  9 1/2  10.00  10.25  10.00  9.50  8.00  9.00 
SAMB1000149 1/2  1  2.50  9 1/2  19.00  13.75  16.00  12.75  14.50  12.00 
SAMB10001612  1  2.00  12  14.00  13.75  14.00  12.75  12.00  12.00 
SAMB12501612  1 1/4  1.75  12  25.50  17.00  20.50  15.75  18.50  15.00 
SAMB12502216  1 1/4  3.75  16  18.00  17.00  16.00  15.75  14.00  15.00 
*Recommendation based on independent laboratory testing. All other embedment and center to center recommendations based on design by analysis provisions of ACI 349. Appendix B.
NOTES:
1. Maximum attachment thickness is based on torque tensioning of anchor. Any lesser attachment thickness may be used. Where the anchor is to be hydraulically tensioned, maximum attachment thicknesses will be reduced by one stud diameter.
2. Consideration of stress area reduction for limited concrete depth is not reflected in the above table. Minimum concrete depth = anchor embedment plus (centertocenter spacing/2).
3. MaxiBolt part numbers are specified as follows: MBDiameter Series Number  Overall LengthSleeve Length (combined expansion sleeve and distance tube lengths).
4. Minimum edge distances quoted are for shear or combined tension and shear. For tension loading, edge distance may be reduced to 75 percent of given value.
5. Allowable values are limited to a maximum of six bolts in a tworow, threecolumn, or threerow, twocolumn arrangement. Allowable values may also be used for anchors placed in a single line and separated from other anchor lines by a minimum distance of two times the anchor embedment length.
6. Inplace embedment length is determined by subtracting the overall length (second number shown in Anchor Part No. column) from the exposed projection.
Anchor Diameter (Inches) 
Tension (Pounds) 
Shear Case 1 (Pounds) 
Shear Case 2 (Pounds) 
3/8  3,710  1,925  2,455 
1/2  6,765  3,510  4,470 
5/8  10,765  5,590  7,115 
3/4  15,910  8,265  10,515 
1  23,095  12,000  15,265 
1 1/4  30,960  16,060  20,465 
1. Shear Case 1 applicable for grouted plates. Shear Case 2 applicable for plates in contact with concrete surface.
2. Use straight line interaction for combined tension and shear loading.
3. All load allowables are premised on the concrete's ability to develop 100 percent of the stud bolt's minimum ultimate capacity. Applicable code provisions should be employed to determine the design strength of overlying concrete for particular anchor spacing and embedment combinations. Since most codes base the design strength of concrete on the combined projected areas of all bolts in a given pattern, Drillco has provided a Projected Concrete Area Calculator to assist in concrete strength calculations. Note that codes differ on the question of permitting reduced load allowables in cases where the design strength of concrete is less than the bolt's specified minimum ultimate strength.
4. The allowable loads noted in the above table may be assigned to each anchor in a multipleanchor attachment. A single anchor used to anchor an attachment shall be designed for one half of the allowable loads noted. A single anchor is considered to be an anchor with no capability to redistribute its load to adjacent anchors.

STUD DIAMETER (Inches) 
ATTACHMENT THICKNESS (Inches) 
(Inches) 




Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 

SAMB37564 1/2  3/8  1.50  4 1/2  9.00  6.75  7.50  6.25  6.50  6.00 
SAMB50086  1/2  1.00  6  12.50  8.75  10.00  8.25  9.00  7.75 
SAMB500118  1/2  2.00  8  8.50  8.75  7.00  8.25  6.00  7.75 
SAMB5001310  1/2  2.00  10  6.00  8.75  4.50  8.25  4.00  7.75 
SAMB625107 1/2  5/8  1.25  7 1/2  16.00  11.00  13.00  10.25  11.50  9.75 
SAMB625139 1/2  5/8  2.25  9 1/2  11.50  11.00  9.50  10.25  8.50  9.75 
SAMB6251612  5/8  2.75  12  8.00  11.00  6.50  10.25  5.50  9.75 
SAMB750139 1/4  3/4  2.75  9 1/4  18.50  13.00  15.00  12.25  13.50  11.75 
SAMB7501611 1/2  3/4  3.50  11 1/2  14.00  13.00  12.00  12.25  10.50  11.75 
SAMB7501813  3/4  4.00  13  12.00  13.00  10.00  12.25  8.50  11.75 
SAMB10001612  1  2.00  12  24.00  16.75  20.00  15.75  16.00  14.75 
SAMB10002216  1  4.00  16  16.00  16.75  14.00  15.75  12.00  14.75 
SAMB10002620  1  4.00  20  10.00  16.75  8.00  15.75  6.00  14.75 
SAMB12502015  1 1/4  3.00  15  28.00  20.00  22.00  18.75  20.00  17.75 
SAMB12502520  1 1/4  3.00  20  18.00  20.00  14.00  18.75  12.00  17.75 
SAMB12503025  1 1/4  3.00  25  8.00  20.00  8.00  18.75  6.00  17.75 
*Recommendation based on independent laboratory testing. All other embedment and center to center recommendations based on design by analysis provisions of ACI 349. Appendix B.
NOTES:
1. Maximum attachment thickness is based on torque tensioning of anchor. Any lesser attachment thickness may be used. Where the anchor is to be hydraulically tensioned, maximum attachment thicknesses will be reduced by one stud diameter.
2. Consideration of stress area reduction for limited concrete depth is not reflected in the above table. Minimum concrete depth = anchor embedment plus (centertocenter spacing/2).
3. MaxiBolt part numbers are specified as follows: MBDiameter Series Number  Overall LengthSleeve Length (combined expansion sleeve and distance tube lengths).
4. Minimum edge distances quoted are for shear or combined tension and shear. For tension loading, edge distance may be reduced to 75 percent of given value.
5. Allowable values are limited to a maximum of six bolts in a tworow, threecolumn, or threerow, twocolumn arrangement. Allowable values may also be used for anchors placed in a single line and separated from other anchor lines by a minimum distance of two times the anchor embedment length.
6. Inplace embedment length is determined by subtracting the overall length (second number shown in Anchor Part No. column) from the exposed projection.
Anchor Diameter (Inches) 
Tensile Stress Area (Tsa) (in^2) 
Material Ultimate Strength (Fult) (Psi) 
Material Yield Strength (fy) (Psi) 
Ultimate Tension Strength (Fult x Tsa) (Lbs) 
Ultimate Shear Strength (0.6 x Fult x Tsa) (Lbs) 
Allowable Tension Strength (0.6 x Fult x Tsa) (Lbs) 
Allowable Shear Strength (0.6 x 0.6 x Fult x Tsa) (Lbs) 
1/4"  0.032  110,000  95,000  3,520  2,112  2,112  1,267 
3/8"  0.078  110,000  95,000  8,580  5,148  5,148  3,089 
1/2"  0.142  110,000  95,000  15,620  9,372  9,372  5,623 
5/8"  0.226  110,000  95,000  24,860  14,916  14,916  8,950 
3/4"  0.334  110,000  95,000  36,740  22,044  22,044  13,226 
1"  0.606  100,000  80,000  60,600  36,360  36,360  21,816 
11/4"  0.9997  95,000  65,000  94,972  56,983  56,983  34,190 
1. Shear Case 1 applicable for grouted plates. Shear Case 2 applicable for plates in contact with concrete surface.
2. Use straight line interaction for combined tension and shear loading.
3. All load allowables are premised on the concrete's ability to develop 100 percent of the stud bolt's minimum ultimate capacity. Applicable code provisions should be employed to determine the design strength of overlying concrete for particular anchor spacing and embedment combinations. Since most codes base the design strength of concrete on the combined projected areas of all bolts in a given pattern, Drillco has provided a Projected Concrete Area Calculator to assist in concrete strength calculations. Note that codes differ on the question of permitting reduced load allowables in cases where the design strength of concrete is less than the bolt's specified minimum ultimate strength.
4. The allowable loads noted in the above table may be assigned to each anchor in a multipleanchor attachment. A single anchor used to anchor an attachment shall be designed for one half of the allowable loads noted. A single anchor is considered to be an anchor with no capability to redistribute its load to adjacent anchors.

STUD DIAMETER (Inches) 
ATTACHMENT THICKNESS (Inches) 
(Inches) 




Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 
Center to Center Spacing (Inches) 
Edge Distance (Inches) 

SAMB37563 1/2  3/8  2.50  *3.5  * 7.50  6.25  *7.50  5.75  * 7.50  5.50 
SAMB37564 1/2  3/8  1.50  4 1/2  9.00  6.25  7.00  5.75  6.00  5.50 
SAMB50086  1/2  1.00  6  12.00  8.25  10.00  7.75  8.00  7.25 
SAMB500118  1/2  2.00  8  8.00  8.25  6.00  7.75  6.00  7.25 
SAMB5001310  1/2  2.00  10  6.00  8.25  4.00  7.75  4.00  7.25 
SAMB625107 1/2  5/8  1.25  7 1/2  16.00  10.25  12.00  9.75  10.00  9.00 
SAMB625139 1/2  5/8  2.25  9 1/2  10.00  10.25  8.00  9.75  8.00  9.00 
SAMB6251612  5/8  2.75  12  8.00  10.25  6.00  9.75  4.00  9.00 
SAMB750139 1/4  3/4  2.75  9 1/4  18.00  12.50  14.00  11.50  12.00  11.00 
SAMB7501611 1/2  3/4  3.50  11 1/2  14.00  12.50  12.00  11.50  10.00  11.00 
SAMB7501813  3/4  4.00  13  12.00  12.50  10.00  11.50  8.00  11.00 
SAMB10001511  1  2.00  11  22.00  15.75  18.00  14.75  16.00  13.75 
SAMB10001814  1  2.00  14  16.00  15.75  14.00  14.75  12.00  13.75 
SAMB10002016  1  2.00  16  12.00  15.75  10.00  14.75  8.00  13.75 
SAMB12501814  1 1/4  2.00  14  28.00  19.00  24.00  17.75  20.00  16.75 
SAMB12502418  1 1/4  4.00  18  22.00  19.00  18.00  17.75  14.00  16.75 
SAMB12502822  1 1/4  4.00  22  18.00  19.00  14.00  17.75  10.00  16.75 
*Recommendation based on independent laboratory testing. All other embedment and center to center recommendations based on design by analysis provisions of ACI 349. Appendix B.
NOTES:
1. Maximum attachment thickness is based on torque tensioning of anchor. Any lesser attachment thickness may be used. Where the anchor is to be hydraulically tensioned, maximum attachment thicknesses will be reduced by one stud diameter.
2. Consideration of stress area reduction for limited concrete depth is not reflected in the above table. Minimum concrete depth = anchor embedment plus (centertocenter spacing/2).
3. MaxiBolt part numbers are specified as follows: MBDiameter Series Number  Overall LengthSleeve Length (combined expansion sleeve and distance tube lengths).
4. Minimum edge distances quoted are for shear or combined tension and shear. For tension loading, edge distance may be reduced to 75 percent of given value.
5. Allowable values are limited to a maximum of six bolts in a tworow, threecolumn, or threerow, twocolumn arrangement. Allowable values may also be used for anchors placed in a single line and separated from other anchor lines by a minimum distance of two times the anchor embedment length.
6. Inplace embedment length is determined by subtracting the overall length (second number shown in Anchor Part No. column) from the exposed projection.
NOMINAL
ANCHOR SIZE (Inches) 
DRILL DIAMETER
MAXIMUM (Inches) 
MINIMUM HOLE
DEPTH, ANCHOR EMBEDMENT PLUS 
UNDERCUTTING TOOL  
Diameter A
(Inches) 
Diameter B
(Inches) 
Tolerance
(Inches) 

1/4  0.530  1 inch  0.500  0.750  +.020
.060 
3/8  0.655  1 inch  0.625  0.875  +.020
.060 
1/2  0.778  1 inch  0.709  0.949  +.010
.030 
5/8  0.975  1 inch  0.905  1.176  +.010
.030 
3/4  1.172  1 1/2 inch  1.102  1.550  +.010
.040 
1  1.690  2 inches  1.625  2.275  +.010
.050 
1 1/4  2.065  2 inches  2.000  2.770  +.010
.060 
1/2 Heavy  0.845  1 inch  0.812  1.120  +.010
.030 
NOTES:
1. Undercutting tool diameter A is given for identification purposes only. No tolerance applies to this dimension.
2. Undercutting tool diameters A and B are noted in Figure No. 3.