for Drillco Maxi-Bolt Anchors

with ASTM A193 Grade B7 Stud Bolts

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 1applicable for grouted plates.Shear Case 2applicable 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 combinedprojectedareas 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 multiple-anchor 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.

with ASTM A36 Stud Bolts

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 1applicable for grouted plates.Shear Case 2applicable 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 combinedprojectedareas 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 multiple-anchor 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.

with ASTM A193 Grade B8 (Type 304)

and B8M (Type 316)

Class 1 Stainless Stud Bolts

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 1applicable for grouted plates.Shear Case 2applicable 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 combinedprojectedareas 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 multiple-anchor 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.

with ASTM A193 Grade B8 (Type 304)

Class 2 Stainless Stud Bolts

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 |

Shear Case 1applicable for grouted plates.Shear Case 2applicable 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 combinedprojectedareas 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 multiple-anchor 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.

with ASTM A193 Grade B8M (Type 316)

Class 2 Stainless Stud Bolts

Anchor Diameter (Inches) |
Tension (Pounds) |
Shear Case 1 (Pounds) |
Shear Case 2 (Pounds) |

3/8 | 3,525 | 1,830 | 2,330 |

1/2 | 6,425 | 3,335 | 4,245 |

5/8 | 10,225 | 5,310 | 6,760 |

3/4 | 16,115 | 7,850 | 9,990 |

1 | 23,095 | 12,000 | 15,265 |

1 1/4 | 30,960 | 16,080 | 20,465 |

Shear Case 1applicable for grouted plates.Shear Case 2applicable 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 combinedprojectedareas 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 multiple-anchor 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.