Bert,
I am going through the same thing right now. You are interpreting the drawing
correctly. My engineer has specified a lattice made up of the the L-shaped
rebar as you described - 1/2" diameter (#4), with straight pieces of the same
rebar going in the other direction. This creates a lattice covering the top and
tower-side faces of the block. The squares formed by the rebar should be no
larger
than 12". The rebar should be 3" inside the block [this is referred to as "3
inches
of concrete cover"]. In order to support this structure in the hole, you may
want
to make the two outer L-shaped rebar sections U-shaped instead. This will
permit the structure to stand erect during the concrete pour. Remember to use
pavers in the bottom of the hole to raise the rebar 3". Calculate your
dimensions
carefully. The length of the short leg of the L will be 6 inches less than the
depth of your block. This will allow 3 inches below and above.
Jim K1IR
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