Reply by Ghidrah

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Posted on Help with shop floor please

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667 posts in 2232 days

#1 posted 06-02-2015 12:31 AM

pdxrealtor, everyone’s concern is because of all the anomalies at the beginning of the project.

Being 1” off is likely from math errors, either you didn’t subtract the actual (DB&1/2G) dims from the joists, (Double Box and 1/2 Girt) and or you didn’t square one end of the joist, measure off it and subtract (DB &1/2G) from 96”. In a (paper world) it would be 4 1/2”, (real world) with fresh PT lumber could be up to 4 7/8”.
Minus the actual (DB&1/2G) dim from 96”, mark it and your dead monkeys with the cut.

Some may not be aware most framing lumber, (minus 2X4 & 6) 7’4 and 8’ studding is anywhere from a 1/2” to 1” longer than the stated length. If one were to err in assuming an 8’ 2X8 or 10 was square and exactly 8’ then measure off an arbitray end, a major error will show up when applying the subfloor, gable wall and possibly roof sheathing.

Another mistake the novice makes is butting the ply tight at the sides, CDX does expand and contract much more than AC or furniture grade ply. It tends to buckle in high heat and moisture, even T&G ply does.

-- I meant to do that!

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