It actually sways back and forth a little, not just vibrates.
Also there are slopes in the floor. I think the heating unit is pulling the floor down in the middle. I am out of here soon anyway on account of niggers but damn do houses collapse sometimes? I think we have a candidate here.
I believe we will start seeing more houses floors caving in/collapsing since we started spacing joists 16" or even 24" apart instead of 12" or less.
Just a guess though. No expert on the matter by any means.
The spacing of the joists isn't a factor, they are wider boards designed to carry the same load at wider intervals than the 2x4's twelve inches on center they had been using. The wider spacing and thicker joists allows more insulation
floor joists are 16 inches (on center) by building code. roof trusses can be 24 inches. some older building might be different but usually that is with 1 inch tongue and grove floor deck.
I've never agreed with 24" spacing on rafters. I always go with 16" when I build anything. Snow loading is a bitch. And some of those pre-built trusses look pretty flimsy to me. They fall apart if you move them. I wouldn't want to use them with 24" spacing.
Ha, reminds me, there was once a house in my area -- a new bungalow -- that had the walls splayed out in front and back. It got some snow on the roof, and the front wall wasn't tied in with the back wall of the house. I guess the builders figured, "Roof trusses, don't need it." Well, they did. It was funny, but horrifying at the same time. The front wall was sticking out at the top by about three feet.
Sixteen inch spacing of studs has been the standard since long before I was born, at least where I live. Twelve inch spacing is overkill, especially with 6" studs instead of 4" studs. Most houses built now have thicker walls to increase insulation, at least in northern states. The problem is lack of diagonal bracing. The corners of a house need to be braced diagonally against the wind, or the house sways and twists. The floor joists need diagonal bracing to make the entire floor act as a single unit, instead of each joist moving up and down independently. If a builder skips on the diagonal bracing, there can be problems.
This is easily the most replys I've had to a comment. Justified though. I was ignorant on the subject and probably shouldn't have put my 2 cents in.
It does prove the whole, "If you want to find out about something on the internet, don't ask. Just write a little bit of wrong information and you'll be corrected."
Just don't have any house parties with 90 people dancing up and down in your living room.
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