Patent ID: 8636456

Claim:
A building structure comprising: a first steel building member and a second steel building member connected by a plurality of fasteners, each fastener being steel comprising a head capable of clamping the first steel building member to the second steel building member with the fastener installed, a tapered lead portion having an angle in the range from 30 to 60° of at least HRC 50 hardness adapted to start into a pilot hole in at least the second steel building member, a thread-forming portion of at least HRC 50 hardness adapted to thread the fastener into at least the second steel building member, and a threaded portion having a through hardness in a range from about HRB 70 to HRC 40, such that the fastener is capable of providing a ratio of failure torque to thread-forming torque of at least 3.0 and a ratio of failure torque to drive torque greater than 10 when the second steel building member having a thickness of about 0.25 inch and the pilot hole having at least one diameter within nominal diameter from 80 to 98% of major diameter of the threaded portion.