What is the horizontal security blocking required on the side(s) of framed doors?

The requirement for horizontal security blocking on the sides of framed doors is two studs. This is essential for providing adequate strength and support to the door frame, ensuring that the door operates smoothly and securely. The two studs serve to anchor the door frame firmly within the wall assembly, helping to maintain structural integrity. This anchoring is especially crucial in areas where additional security is needed, such as entry points in residential buildings. By using two studs, builders ensure that the door is less susceptible to forces that may compromise its stability, such as weather elements or attempted forced entry. Therefore, the standard of two studs optimally balances stability and structural support for framed doors.