Hi,
I just installed some 21 foot ceiling joists for my Garage addition. The ends are nailed down, and are fine. My worry is the center. It is kinda flimsy and moves with the wind. Should I put blocking between them in the center, or does anyone have a better idea??
Thanks in advance.....
pb4sc
2006-06-22 14:05:36 · 5 answers · asked by PB4SC 2 in Home & Garden ➔ Maintenance & Repairs
split your 21' into 3 sections, snap lines approx. 7' nail plank for walkway down the center and run a row of blocking on each side.
should stiffen it up nicely. depending on how much room you have you could lay a couple of sheets of plywood down for extra storage above.
Hope This Helps
Good luck on the new addition!
2006-06-22 14:35:00 · answer #1 · answered by Anonymous · 1⤊ 0⤋
It sounds like there are no trusses. 21 feet is a long span even for a 2 x
Id begin I think by adding supports from joist to joist as bracing, at whatever they are apart 16/24?
I'd also add a walk way but even at that it should be supported to the roof beams. I might even fabricate my own trusses, modest at least. Side to side would be less a worry for me than eventual sagging and horizontal warp.
I'll assume they may not be connected to any load bearing beams? I'm also not clear about the balance of the structure? MOVES with the wind? Is it that the additionj isn't roofed over yet, or the entire structure moves from wind?
Not picking, just trying to get a more clear picture.
Other questions might be are the joists/rafters open to the garage or have you a drywall ceiling? Certainly over a 21 foot span, I wouldn't walk across, no matter ceiling under or not, without more adequate support,,,even from 4 x 4 upright support beams from the garage floor to the ceiling.
I probably have asked more than I've answered, but i'm curious.
Rev. Steven
2006-06-22 14:29:23 · answer #2 · answered by DIY Doc 7 · 0⤊ 0⤋
Cantilever the center to the outside. In other words, make a triangle with support pieces converging in the center of the joists and at the ends.
2006-06-22 14:09:53 · answer #3 · answered by The Backstage Bandit 2 · 0⤊ 0⤋
A row of bridging would work, but if you are worried about it put in a double row. And a rat run..to tie it all together
Hope I helped... Have a Blest day :)
2006-06-22 14:10:58 · answer #4 · answered by Big Hoss 2263 2 · 0⤊ 0⤋
Beth N Wayne hit all the nails on the head.
Good job...
2006-06-22 20:28:15 · answer #5 · answered by cocky 1 · 0⤊ 0⤋