I am redoing my kitchen in my house but I have a sag in the floor where the range, cabinets and a bathroom is located. Not much of a sag, but enough for me to notice. On the opposite side from that sag, across the main center joist, was another sag where the main stairs is located to the second floor.
Log in or Sign up. Hey all, I bought my house last year, had an inspection done and everything was ok. Over the last year we have noticed that the first floor is very bouncy.
Whenever anyone walked across the kitchen floor in the home where This Old House general contractor Tom Silva grew up, teacups trembled in their saucers and pots and pans rattled on the stove. Eventually his father, a carpenter, went down to the basement with Tom in tow and reinforced the undersized floor joists. Tom's house was built inbut bouncy floors aren't just an old-house problem.
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Read This]. View First Unread. Sbiordi: The addition to the 2x4 "lower flanges" to the joists will make the joists substantially more ridgid in the vertical plane and somewhat more ridgid in the horizontal plane i.
View Full Version : Joist re-enforcement vs "sistering". Taking CX's advice :I am posting this message to briefly discuss joist re-enforcement vs joist sistering. Now, sistering is the addition of extra wood joists to a floor that, for the considerations of floor tiling integrity, are to stiffen the floor.
Using span tables to size joists and rafters is a straight-forward process when you understand the structural principles that govern their use. Wood is naturally engineered to serve as a structural material: The stem of a tree is fastened to the earth at its base foundationsupports the weight of its branches column and bends as it is loaded by the wind cantilever beam. A complete analysis of wood's mechanical properties is complex, but understanding a few basics of lumber strength will allow you to size joists and rafters with the use of span tables. Let's start by taking a broad view.
If the Joist Girder is not a simple span, or if the loading condition is anything other than concentrated panel point loads, the Specifying Professional must clearly indicate the loading i. The manufacturer designs the Joist Girder seat for the imposed vertical concentrated loads. The Basic Connection becomes a moment connection when the bottom chord of the Joist Girder is welded to the stabilizer plate.
Blocking does little to nothing to reduce deflection of joists. An oiverloaded joist will not fail straight down in deflection. It wil want to roll or twist first which then puts it in a postion where it is weaker than in perfect vertical alignment. This weaker positioning in turn lets it sag further.