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Re: Torque vs. Tension in Bolts

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     Charles,
     
     The RED HEAD "Trubolt" looks like a regular wedge anchor.  Are you 
     sure you did not mean the RED HEAD "Redi-Bolt" which is their heavy 
     duty sleeve anchor??
     
     Thomas Hunt

     
Some models of sleeve anchor have a headed bolt within the outer sleeve, 
instead of a male stud and nut. An advantage is that in event of removal 
later, no stud or anything else projects above the concrete surface after 
the bolt is unscrewed and loose outer sleeve lifted out. ITW Red Head 
"Trubolt" is an example.
     
Charles O. Greenlaw  SE   Sacramento CA