Apparatus for fabrication of a structural member and related fabrication methods

A fabrication machine, comprising:

• a mechanism engageable with a wrapper to pull the wrapper along a track of said fabrication machine in a direction of material flow, the wrapper comprising a flexible sheet of cellulose based material;
• side rollers, the wrapper with a core emplaced upon the wrapper are positioned between the side rollers, the core comprising laminated fiberboard sheets, the side rollers secured at a side roller angle relative to the direction of material flow to engage the wrapper and impart a peripheral tension to the wrapper around the core as the wrapper and the core move in the direction of material flow along the track;
• and
• top rollers, the wrapper and the core positioned between the top rollers and the track, the top rollers secured at a top roller angle relative to the direction of material flow to engage the wrapper and impart a peripheral tension to the wrapper around the core as the wrapper and core move in the direction of material flow along the track, the peripheral tension imparted by the side rollers to the wrapper and imparted by the top rollers to the wrapper is at least in directions orthogonal to the direction of material flow.