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Old 08-29-2016, 06:37 AM   #11
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rather than drilling 3/8" holes I would consider getting some Joist Hangers from your local lumber yard or Lows, Home Depot, etc. You can afix them to the frame with only self tapping screws. They are designed to carry the weight and you do not risk weakening your frame by drilling holes.

If you MUST drill holes, Id use 1/4" instead and be sure to drill in the center of the frame member so as not to weaken it in either tension of compression when it flexes under a load.

Good Luck

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Old 08-29-2016, 07:02 AM   #12
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A good welding shop can use carbon fiber protective cloth to protect the water barrier and tack weld 1.5- 2 inch "L" stock across there with no problem. A 2X4 can possibly warp and cause new problems.


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