Re: [TowerTalk] Is Tie-wrapping the rebar cage acceptable ???? tnx

[Red <RedHaines@centurytel.net>]

Hi, Dan;

Guess your question is in the title.  Wired rebar joints are acceptable 
from a structural perspective.  The wires must be strong enough to hold 
together the rebar pieces while the concrete is poured and sets.  
Stresses during the pour may be quite significant, and you don't want 
the cage to come apart at that time.

Wired is not sufficient to maximize the value of the base a a Ufer 
ground, to dissipate lightning.  The cage must be designed to accept the 
lightning strike from the tower and spread the lightning energy 
effectively, meaning minimum impedance, to the earth around the base.  
This requires welded rebar joints, which requires rebar that meets an 
acceptable specification.  Many home material suppliers don't know if 
the rebar they sell meets any specification.  Go to a vendor who 
supplies for construction that must meet overall specifications go get 
your rebar.  They may charge a few dollars more, but may make up for 
that by cutting it to length for you at no additional charge.

73 es gud luk de WOØW

dan bookwalter wrote:

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See: http://www.mscomputer.com  for "Self Supporting Towers", "Wireless Weather Stations", and lot's more.  Call Toll Free, 1-800-333-9041 with any questions and ask for Sherman, W2FLA.

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