from The Century Dictionary.
- noun A long rod, threaded at both ends, with a nut and washer-plate, or with a fixed head at one end, used to connect two or more parts of a structure or frame or truss and resist tension. In England used as a synonym for ‘through-stay,’ employed in boilers or similar structures exposed to internal pressure, to tie two parallel surfaces together.
Sorry, no etymologies found.
That method may work on simple tie-bolt setups with weak screws, but not all bedrooms are like that.