You're going to have add columns supporting the bottom and top of the stringers.
Or you can double up the joists on either side of the top and thru-bolt them to stringers.
You'll have to double or triple up the joists below the stringers (depending on the span of the joists)
Bearing.
Two common names are a "newel" post and a "riser". Or stringer
A shaft bearing is a low friction support device for a rotating member of a mechanical machine.
It is the same thing as a pilot bearing. Goes into the rear of the crankshaft to support the input shaft of the transmission.
to support crankshaft
putting a journal bearing at each end of the turbine rotor or shaft would be to support it.
it is used to provide support for long shafts.
I'm not sure what the question is, but I'll do my best to elaborate on the Center Support Bearing. Basically, it is a free-spinning bearing that keeps the driveshaft aligned properly. Without this bearing, the driveshaft will "wiggle" and knock around, possibly causing damage to the driveshaft's U-Joint. I've been told they are around $250 from Nissan.
Raising head and chest, rolling over, sitting up with support, sitting up without support, crawling, walking.
LOAD BEARING WALLS Walls that must support the dead load of their own weight and the weight of subsequent bearing structural members placed upon them. In addition, load bearing walls must be capable to carry the load of "live" loads that are anticpated to be placed upon the the system without deflection that can degrade or negatively impact structural intergrity. NON LOAD BEARING Walls that are only intended to support themselves and the weight of the cladding or sheathings attached. Non load bearing walls provide no structural support and may be interior or exterior walls. Non load bearing walls must be braced to resist minimum 5 psf lateral loads.
It is not necessary if it only needs to support the weight of the sheetrock. They are non-load bearing.
70 inches is usually regarded as the absolute maximum length a driveshaft should be without adding a center support bearing