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There can be numerous causes for a floor to buckle over a floor joist. Flooring was not installed perpendicular to floor joist. Flooring was not allowed for proper expansion - expansion gap needed. Flooring was not properly fastened or not enough fasteners was applied. Excessive water or moisture got onto the flooring causing it to buckle - check appliances, plumbing, windows and doors for water. Damaged or cracked floor joist.
Generally speaking, the thickness of the plywood layed directly over floor joist.
A joist note on a first floor plan would refer to the Joist below that floor, a joist note on the third floor plan woud be for that floor.
Do you mean what can soft wood be used for. Here are some uses. Roof trusses/ floor joist/ ceiling joist/ stud partitions/ timber flooring/ wall strapping/ linning boards internal finnishing. ect
it depen on the size of the joist
Floor joist or ceiling joist? Floor joist have a board on the end all the way along the side of the building called a rim joist. Like the cross bar on the top of a T. Ceiling joist are nailed down into the top plate of the wall and to the rafters where possible.
I don't understand your question completely, but I think what you are asking is how far apart support can be for a subfloor or floor decking. It will vary with the type of construction, but for residential housing it's almost always 16 inches between the floor joists. That would be measured from the center of the joist to the center of the next joist.
Almost for certain, you have water damage in your sub floor which is weakening the floor, causing it to sag, causing the tile to crack. Yes you could replace the sub floor and flooring, but find what's causing the water damages and fix that first. or a joist could be broken
to support the sub floor.
Joist possibly ? A joist is the boards under the floor and above the ceiling that span the room or building. What the floor or ceiling is attached to.
Not sure what you mean? floor joist span table???
Joist = one of the parallel pieces of timber to which the boards of a ceiling or floor are fastened