Tension bolts - Thread projection past the nut
Tension bolts - Thread projection past the nut
(OP)
Is there a requirement for the minimum thread projection of a bolt in tension past the nut at the end of the bolt?
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Tension bolts - Thread projection past the nut
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RE: Tension bolts - Thread projection past the nut
RE: Tension bolts - Thread projection past the nut
AISC states "The length of bolts shall be such that the end of the bolt will be flush with the face of the nut when properly installed".
RE: Tension bolts - Thread projection past the nut
Ron
RE: Tension bolts - Thread projection past the nut
Carl Bauer
RE: Tension bolts - Thread projection past the nut
With respect to the South African requirements, aerospace requirements are that there are two threads exposed on the tension side of the bolt where most other bolt specs require that there are 6 threads for tensile testing. Testing values indicate that having the two threads increases the tensile capacity by approximately 10%. I'm not sure about the reason for the increase except that there could be funny stress risers in the vicinity of the threads and that with the thread generally being the weakest part of the bolt that the 6 threads provides a greater opportunity for failure.