Effect of Drying Method on the Permeability Coefficient of Oak Wood (Quercus infactoria)

In this study، the effect of drying method on the permeability coefficient of the oak wood (Quercus infectoria Oliv) was studied. Freshly-cut logs of oak were prepared from Oureman، the east area of Kourdistan in Iran. Then، boards with nominal thickness of 6 cm were cut. The boards were dried using two methods. In the first method، the boards were air dried to the moisture content close to FSP for 45 days and then they were kiln dried using T5-D1 schedule. In the second method، the boards were dried from green condition to the final moisture content of 10% using T5-D1 schedule. Then، the permeability coefficient in the transverse and longitudinal directions in both heartwood and sapwood regions was measured، separately. Results showed that the permeability of oak boards dried by kiln drying method both in the transverse and longitudinal directions and also in the heartwood and sapwood regions was greater than that of those dried by the combined method (air drying + kiln drying).