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This paper selected lumbers of Manchurian ash (Fraxinus andshurica), Manchurian walnut (Juglans mandshuricd) and Spruce (Picea jezoensis vai.koamvii) for manufacturing glulam with water-boe polymeric-isocyanate adhesive to determine process variables. The process variables that include specific pressure, pressing time and adhesive application amount influencing the shear strength of the glulam, were investigated through the orthogonal test. The results indicated that optimum process variables for glulam manufacturing were as follows: Specific pressure of 1.5 MPa for Spruce and 2,0 MPa both for Manchurian ash and Manchurian walnut, pressing time of 60 min and adhesive application amount of 250 g/m2.