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Technical Information
Section 10700
Connections Notes

Concrete and Steel
Anchor connections shown on other pages are intended for use with the frame designs provided. Tension and shear values may be taken and applied directly for pure tension or pure shear forces. Combined loadings should be calculated using the interaction formula (based on load resistance factor design for steel and ultimate strength design for concrete) as shown on the right:

Concrete: Steel:


Softwoods and Hardwoods

Details shown for hardwood and softwood (as defined by AITC) are based on recommended minimum embedment depths of 11 screw diameters for softwoods and 7 screw diameters for hardwoods. When these minimum recommended embedment depths can not be reached, the following tables may be used to determine the allowable total anchor loads for 2 fasteners in parallel and perpendicular shear. The allowable withdrawal load in tension may be calculated from the detail by multiplying the allowable tension value shown by the actual embedment depth of the typical screw.

Where the drawings refer to parallel and/or perpendicular shear, it refers to the direction of the forces with respect to the grain of the wood. All threaded fasteners are assumed to be commercial quality, Grade 2.



SOFTWOODS:
Embedment (Inches) Lag Shank Diameter (Inches) Parallel Shear (Lbs.) Perpendicular Shear (Lbs.)
6 5/8 1,800 860
5 5/8 1,400 690
1/2 1,220 630
4 5/8 1,060 510
1/2 920 470
3 5/8 700 340
1/2 590 310
3/8 460 140
HARDWOODS:
Embedment (Inches) Lag Shank Diameter (Inches) Parallel Shear (Lbs.) Perpendicular Shear (Lbs.)
4 5/8 1,480 710
3 5/8 980 475
1/2 830 430
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