Jack Ryan
Registered: September 2004
Location: Grodey Ridge, Indiana
Posts: 664
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Fri January 13, 2006 1:07pm
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Those are the old bridge timbers backing up the plywood forms and rebar going all the way through to hold it all together like wall ties in a commercial form. There will be a third row of timber along the middle there before it's strong enough to hold concrete.
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