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  1. M

    Dark grey blotches in new concrete?

    7 days ago I poured a concrete in front of my garage. I used 4000 with fiber. My problem is it has dark grey blotches scatterd through out. When I poured it was 50 deg and dropped to the low 30's over night. I coverd it with blankets. Also I poured a pad in front of my shed that I didn't cover...
  2. M

    Rafter sizing?

    I am in the planning stages of a garage addition in the spring. It will be 15' wide by 30' long on my detached garage. The rafter span is 15' with a 4"-12" pitch with asphault shingles. I have been having a tuff time finding rafter tables. What size rafter do i need in southern NJ? Another...
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