The anchor bolt must be embedded ___ into the slab.

The anchor bolt must be embedded ___ into the slab.

• A. 5 inches
• B. 9 inches
• C. 11 inches
• D. 7 inches

Answer: (D)

The bond and strength of an anchor bolt in concrete come from how deeply it is embedded. Embedding the bolt deeper into solid concrete increases the resistance to pulling out and bending, because more concrete is engaged around the bolt to transfer load. Seven inches is the standard minimum embedment for typical anchor bolts in slabs, giving enough mass of concrete around the bolt to develop the connection’s resistance while still leaving room above the slab for nuts, washers, and the base plate. Five inches would be insufficient for reliable withdrawal resistance, while deeper embedment (nine or eleven inches) is not necessary for this common scenario and isn’t the standard minimum tested in many practice exams. So, seven inches provides the proper balance of sufficient embedment depth to secure the bolt and leave space for hardware above the surface.

The bond and strength of an anchor bolt in concrete come from how deeply it is embedded. Embedding the bolt deeper into solid concrete increases the resistance to pulling out and bending, because more concrete is engaged around the bolt to transfer load.

Seven inches is the standard minimum embedment for typical anchor bolts in slabs, giving enough mass of concrete around the bolt to develop the connection’s resistance while still leaving room above the slab for nuts, washers, and the base plate. Five inches would be insufficient for reliable withdrawal resistance, while deeper embedment (nine or eleven inches) is not necessary for this common scenario and isn’t the standard minimum tested in many practice exams.

So, seven inches provides the proper balance of sufficient embedment depth to secure the bolt and leave space for hardware above the surface.