Breakaway hanger and method of attaching a breakaway hanger to metal decking
OwnerSteven Andrew Rothinventor
Life of this patent
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Abstract
A hanger and method of a hanger to a metal decking are described. The metal decking includes a bottom flange and a pair of webs each having a groove. The hanger is side to generally conform to the shape of the bottom flange and a the webs and includes at least two set bolts that engage the pair of grooves. One of the set bolts is designed do deform when a load exceeds a predetermined load, such that the hanger disengages from the metal decking to prevent seismic damage The method includes positioning the hanger against a bottom flange of the metal decking and advancing two or more set bolts from the hanger into the grooves.
Claims19
A hanger for attaching to an underside of a metal decking for supporting a load less than a predetermined load F*, where the metal decking includes a bottom flange having a width, a first web extending away from the bottom flange having a first groove, and a second web extending away from the bottom flange and having a second groove, where the first groove and the second groove are parallel with a spacing of WG and with a distance H from the bottom flange, said hanger comprising:
- a body including a first end, a second end, and a central portion between the first end to the second end, where said central portion includes a top surface having a length defining a top plane and a bottom surface, where the first end and the second end extend away from the top plane, where the first end includes a first threaded hole at an angle θ relative to the top surface, and where the second end includes a second threaded hole at the angle θ relative to the top surface;
- a first set bolt threadably engaged with the first threaded hole such that the first set bolt forms the angle θ relative to the top surface with a tip of the first set bolt pointing towards the top surface;
- and
- a second set bolt threadably engaged with the second threaded hole such that the second set bolt forms the angle θ relative to the top surface with a tip of the second set bolt pointing towards the top surface,
- such that the hanger is attachable to the metal decking with the top surface placed adjacent to the bottom flange with the first end adjacent to the first web and the second end adjacent to the second end, with the tip of the first set bolt contacting the first groove and with the tip of the second set bolt contacting the second groove, and
- such that when the hanger is attached to the metal decking, the hanger disengages from the metal decking when the load supported by the hanger increases above the predetermined load F*.
A method of attaching a hanger to an underside of a metal decking and supporting a load than a predetermined load F*, where the metal decking includes a bottom flange having a width, a first web extending away from the bottom flange having a first groove, and a second web extending away from the bottom flange and having a second groove, where the first groove and the second groove are parallel with a spacing of and with a distance H from the bottom flange, and where the hanger includes a body including a first end, a second end, and a central portion between the first end to the second end, where said central portion includes a top surface having a length defining a top plane and a bottom surface, where the first end and the second end extend away from the top plane, where the first end includes a first threaded hole at an angle θ relative to the top surface, and where the second end includes a second threaded hole at the angle θ relative to the top surface, a first set bolt threadably engaged with the first threaded hole such that the first set bolt forms the angle θ relative to the top surface with a tip of the first set bolt pointing towards the top surface, and a second set bolt threadably engaged with the second threaded hole such that the second set bolt forms the angle θ relative to the top surface with a tip of the second set bolt pointing towards the top surface, where said method comprising:
- positioning the body adjacent to the metal decking with the top surface adjacent to the bottom flange, with the first threaded hole adjacent to the first groove, and with the second threaded hole adjacent to the second groove;
- advancing an end of the first set bolt through the first threaded hole to contact the first groove;
- and
- advancing an end of the second set bolt through the second threaded hole to contact the first groove,
- such that the hanger disengages from the metal decking when the load supported by the hanger increases above the predetermined load F*.
Dependencies are inferred from the claim text.