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I have always securely attached newel posts to the floor by bolting them
to 2×10 floor joists. This job has a couple of doubled up wood I’s which makes it difficult to put in newels. I was considering using dowels on posts ,but have never considered them sturdy enough. Also I have seem metal
brackets for newel posts which screw to floor . Does anyone have any experience with these. Any sugggestions would be greatly appreciated.
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After installing the landing tread{with const adh,15 ga nails, and #14x3" screws contersunk at newell locations} I usually inst 2 5/16 x 6" hanger bolts thru the L/T into the framing and then bore the newells as nesc to accept them. If enough solid framing isn't available, I'll cut back the sub floor and inst as needed for purchase. I've made several 1/4" thick templates of the various newells that I use with 5/16" holes diag 3/4" from the corners.
Now it's a simple matter of aligning the temp to the newell C/L and opposite diag from the #14x3"
screws. Bore a 1/4" pilot hole and run the lags in to the depth of the machine threads. By using the same template, mark the newells and bore straight 3/8" holes 4" deep. Measure up the 3" in line with the 3/4"inset and bore a 1" hole to access the lag. By usig 6" hangares you have 3" of lag thread into L/T-framing and 3" into the newell. To make the newell fast, just slide the newell over the lags and insert2 5/16" washers and 1 nut and sock it down tight. This gives me a strong conn that seldom if ever fails. Just one way for you to try,--GEO-
*I use the bracket that screws to the floor (countersunk). and then you screw a lag screw up into the bottom of the newell. the newell is then tapped into place, the bracket has a wedge type reciever for the head of the lag screw which gets progressively tighter as you tap the newell over. I believe this is the same type you are asking about. I was pretty skeptical when I first saw this type of fastening system, but after seeing it "in action" I was amazed at how strong it was! The only caveat is that you must have plenty of solid framing directly underneath the newell post to screw the four screws down into.