Capacity of a steel tension rod
Capacity of a steel tension rod
(OP)
Per AISC, what all needs to be checked when designing a steel tension rod (i.e. tie-back rod on a canopy/balcony or lateral bracing rods in a PEMB)?
The textbook I have (Steel Structures: Design and Behavior {5th Edition} by Salmons) makes it look like all you have to check is the tensile strength per AISC-J3.6 Tensile and Shear Strength of Bolts and Threaded Parts. This section of the AISC spec is based on the nominal tensile strength of the tension rod (0.75Fu or as specified), and not the yield strength (Fy). Do you also need to check the design tensile strength per AISC-D2a tensile yielding in the gross section? It looks like when the yield strength of steel is less than 0.625Fu, then the tensile strength per AISC-D2a governs, otherwise the AISC-J3.6 equation governs.
If you don't need to check the chapter D yield strength, why is that?
Lastly, what type of material do you specify for threaded rods on your drawings?
Thanks.
The textbook I have (Steel Structures: Design and Behavior {5th Edition} by Salmons) makes it look like all you have to check is the tensile strength per AISC-J3.6 Tensile and Shear Strength of Bolts and Threaded Parts. This section of the AISC spec is based on the nominal tensile strength of the tension rod (0.75Fu or as specified), and not the yield strength (Fy). Do you also need to check the design tensile strength per AISC-D2a tensile yielding in the gross section? It looks like when the yield strength of steel is less than 0.625Fu, then the tensile strength per AISC-D2a governs, otherwise the AISC-J3.6 equation governs.
If you don't need to check the chapter D yield strength, why is that?
Lastly, what type of material do you specify for threaded rods on your drawings?
Thanks.






RE: Capacity of a steel tension rod
RE: Capacity of a steel tension rod
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RE: Capacity of a steel tension rod
Hokie93, do you know why the yielding check can be neglected when the member is a fully threaded rod?
RE: Capacity of a steel tension rod