technique for accurate placement of ledger
I am replacing a ledger that supports a 4x6 beam as part of a repair project. I will be using 5/8Ã¢ÂÂ hot dipped galvanized threaded rod imbedded 7Ã¢ÂÂ into the 8Ã¢ÂÂ thick grouted CMU wall using Simpson SET-PAC-EZ Adhesive.
I have to drill ÃÂ¾Ã¢ÂÂ holes horizontally in the grouted CMU wall to insert the 5/8Ã¢ÂÂ hot dipped galvanized bolts. This will leave a 1/8Ã¢ÂÂ space between the top of the threaded rod and the top of the ÃÂ¾Ã¢ÂÂ bored hole and no space between the bottom of the threaded rod and the bottom of the hole. I donÃ¢ÂÂt see any way to center the 5/8Ã¢ÂÂ threaded rod in the ÃÂ¾Ã¢ÂÂ hole. Does it matter if the threaded rod is not centered on the axis of the ÃÂ¾Ã¢ÂÂ hole?
The placement of the new ledger needs to be very accurate so there is a tight fit between the top of the ledger and the new 4x6 beam and the joists the beam supports. What is the best way to accomplish this? I was thinking about waiting for the adhesive for the 5/8Ã¢ÂÂ bolts to set then sliding the new 4x6 ledger into position and taping it just hard enough to mark the exposed ends of the 5/8Ã¢ÂÂ threaded rods so they leave an impression on the 4x6 ledger. Then I would locate the center of the 5/8Ã¢ÂÂ impressions and drill 5/8Ã¢ÂÂ holes. Is this a good method? I suspect the accuracy of this method could be hit or miss.
Thank you for taking the time to read my post and consider my questions.