| 摘要 |
Small-diameter logs (10c) are longitudinally bisected and trimmed to form a flattened surface (56a) parallel and opposite the diametric surface (54a) formed by the bisection. All longitudinal surfaces of logs, half-logs and planks not visible in the final product are subjected to an overall pattern of cuts (70) or perforations (76) to relieve uneven wood fiber tension, the two half-logs are adhesively (58) joined at their trimmed flattened surfaces. Then a second longitudinal bisection (62a) is made through the half-log or plank-pile assembly, resulting in two asymmetric structural units (64a, 66a), which are piled in a tight stack (78) to discourage warping as subjected to air- or kiln-drying. The dried structural units may be assembled into rectangular beams (80) or a plurality of them aligned parallely into uniform planar arrays (82, 82a, 86, 86a) for use as paneling, siding, fencing, flooring or decking; tongue-and-grooved laminates (104) of structural units provide strong weather-resistant structures.
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