In a message dated 99-08-31 08:08:36 EDT, firstname.lastname@example.org writes:
> I am having difficulties. I now have the hole and the expert advice on
> filling it from this reflector, but I can't seem to find any construction
> details of the rebar cage. I have looked in the Rohn catalogue and through
> the archives to no avail.
> Would any of you have a three dimensional drawing of what a cage should
> like that you could scan and send? Any special rebar to be used and how are
> the bars tied together? I know from previous discussions, that the cage
> should be kept approximately 3" from the edges of the concrete and not
> ground, by using Dobie blocks or a reasonable facsimile.
Tower base specs typically show what size rebar and the number of
horizontal and vertical pieces. It's just a box made to those specs.
Generally it'll state spacing which is the spec you're looking for.
Rebar # is in reference to 1/8 inch. For instance, #4 rebar is 1/2 inch
(4/8); #6 is 3/4" (6/8); etc. Technically there are different grades of rebar
but I think that any rebar you can find will be adequate for your tower base
as long as it's the right size.
The safest thing to do is to build the cage on the ground and lower it
into the hole. If it's a medium to big hole, the cage will be *heavy* so you
may need a backhoe or something to lower it into the hole.
You just need some baling wire or tie wire to hook everything together.
Your local hardware store will have some.
What kind of tower are you putting up? What are the base specs?
Cheers, Steve K7LXC
FAQ on WWW: http://www.contesting.com/towertalkfaq.html
Administrative requests: towertalk-REQUEST@contesting.com