Sunday, November 27, 2011

Re: Flanges Bolt Head direction

I'm not sure about the direction on communication towers but if it were an (old) airplane, the bolts are inserted downward if the hole is horizontal.  That way, if the nut starts to loosen, the bolt stays in the hole even if the nut drops off.
I don't think it matters on a fully tensioned high strength bolt as it won't loosen up in either orientation.

On Sun, Nov 27, 2011 at 8:54 AM, David Cohen (Baran Raviv) <> wrote:


Is anyone could give some recommendations for the direction of the bolt heads in a communication tower?

The contractor had designed the tower assembly with head bolts directed to ground, by maintenance views I'd preferred to see them assembled with heads directed to the top of the tower, but is anyone could give some other reasons?




David Cohen


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