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Fish out of water-"spike threads"?

Fish out of water-"spike threads"?

Fish out of water-"spike threads"?

(OP)
Hi all,

As the subject states, I am a fish out of water with the structural stuff.

I've got a steel plan from my SE that calls out anchor rod threads to be 'spiked' at both ends, and was wondering if someone could help explain what that actually means.  I would assume it means to destroy the threads in such a way as to prevent the rod from backing out of the nuts, but didn't know if there was a certain method that is commonly used?

The application is for cradling & supporting a bearing beam that is to be cut for the installation of a new reactor.  The 'cradle' is made of MC9, hung from W14 across the beam to be cut with 3/4" rod.

Thanks in advance for your help,
Stacy

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