A generally horizontal log of fiberglass honeycomb material defining side-by-side upstanding adjacent cells substantially throughout the log is provided and the log includes a hard outer covering enclosing the log on all sides. The covering is bonded to the opposing side surfaces of the log and the opposite ends of the log include vertical bores therethrough having thrust sleeves of substantially the same length tightly received in and extending through the vertical bores. The hard outer covering of the log is comprised of resin impregnated fiberglass roving and includes an outer layer of fiberglass resin sprayed or flowed over the covering.
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