OK...here's a project I'm planning for the next two weeks. Moved to a new
neighborhood back in September, and other vegetable gardeners here tell me
that the deer bring shopping carts and pruning shears when they target a
garden. So, I'm resurrecting an old idea I used at another place. I'm going
to make U-shaped tunnels (like quonset huts) made of galvanized fence wire,
and place them over certain rows. Previously, I've only had to deal with
rabbits, so I've held the tunnels in place by bending some of the wire
outward and putting bricks on them. I suspect that deer will laugh at this
arrangement. So, I want to use some sort of heavy metal stakes instead. My
first thought was to use u-shaped pieces of rebar, placed over each end of
the tunnels and pressed into the ground. My theory for bending the rebar:
Tie a blanket around an appropriately shaped tree (to protect the bark), and
my son and I will pull the rebar into a U shape, using the tree as a form.
But...I've never handled rebar. Does the bending idea sound practical?
Bend rebar, maybe, if, you are real strong. Why not a 1/8-1/4" piece of
wire-stock. How about a motion detector sprinkler made for animals, they
use batteries to trigger the unit and shoot a sharp stream
rebar can be bent with a bender called a "hicky". It is really designed to
do tight bends on GRC or IMC conduit. Should be available at any electrical
supply store. I have never seen them at the box stores. Not that I have
looked. A regular GRC bender will work, larger radii and you run the risk of
making the bender useless for conduit.
Using this method stand on the rebar and bend. Then cut.
Only #3 rebar (3/8 inch) can be bent by hand without a bending machine. Just
don't bend it over your knee, try wrapping it around a tree or post.
Anything thicker like #4 (1/2 inch) will probably need a bending machine.
There are electric and manual ones for rent depending on how much bending is
involved. If there are 90 degree bends, a manual bending machine at the
rental shop would be my choice.
You beat me to it. Yes #3 is what they use for swimming pools because
you can bend fairly complex shapes by hand. Just use long pieces and
get out on the end of them for leverage. If you are making a tunnel
that is not a problem. Wear gloves.
If you are making a bunch of identical ones you could make a bending
jig with some plywood and wood blocks screwed to it defining the arc.
I bend rebar by sticking it into a 4' chunk of black-pipe with 6"
sticking out, sliding the remainder into a 6' chunk of black-pipe,
standing on the former, and pulling up on the latter.
The rebar naturally bends to about a 4" diameter curve.
Once I got a bundle of short re-bar rods from Lowes that
was so stiff that it would hardly bend, and which snapped
abruptly at around 90d.. That was exciting, and I don't know
if it was because I got defective rebar, or there's more
than one type.
If you leave that rebar staple in the ground through a season,
you may well need a pickaxe to pry it out again.
You were probably using an ungraded rebar for it to snap. A graded bar like
Gr.40 is softer and easier to bend than a Gr.60 bar and should never snap
bending it to 90 degrees. If you got it at Lowes then I would complain, it
can be very dangerous to work with.
I got some full lengths of that once. If you bent it, it would break.
I didn't use it for re-inforcing. I forged BBQ forks from it. The
tines would not bend. I could pick up a stack of briskets on a 3 foot
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