When the mechanical component is mounted on a concrete foundation, the J-shaped and L-shaped ends of the bolt are embedded in the concrete.
The tensile strength of the foundation bolt is the tensile strength of the round steel itself. The size is equal to the cross-sectional area multiplied by the allowable stress value (Q235B: 140MPa, 16Mn or Q345: 170MPA), which is the allowable tensile capacity of the design.
The foundation bolts are generally made of Q235 steel, which is light round. The strength of the rebar (Q345) is large, and the thread of the nut is not easy to be round. For light round foundation bolts, the buried depth is generally 25 times its diameter, and then a 90 degree hook of about 120 mm length is made. If the bolt has a large diameter (such as 45mm) and the depth is too deep, you can weld the square plate at the end of the bolt, that is, you can make a big head (but there are certain requirements). Both the depth of the burial and the hooks are used to ensure the friction between the bolt and the foundation, so that the bolts are not pulled out.
Post time: May-08-2019