The available supply of yellow-poplar (Liriodendron tulipitera L.), its potential for new uses, and its continuing importance to the furniture industry have created a need to accumulate additional information about this species. As an aid to better utilization of this species. charts for determining cutting stock yields from yellow-poplar lumber are presented for each of the five top grades. Adjustment charts present the changes for specified width cuttings, also by grade. Yield and cost comparisons are made for various grades and grade mixes, with a case study used for illustration. The data should aid manufacturers by making possible comparison of study yields with actual mill yields, comparison of various grade yields with one another, and the evaluation of grade mixes for most efficient production of cutting bill. ,
365 pieces of domestic 38 × 140 × 3600 mm Red pine structural lumber were machine graded conforming to a softwood structural lumber standard (KS F 3020). The allowable bending stresses calculated for each grade were compared with the values currently tabulated in the standard. Four calculation methods for lower 5 th percentile bending stress were non-parametric estimation with 75% confidence level, 2-parameter and 3-parameter Weibull distribution fit, and bending modulus of rupture (MOR)-modulus of elasticity (MOE) regression based method. Only the data set of Grades E8, E9, and E10 were statistically eligible for the 5 th percentile calculation. The MOR-MOE regression based method
This research was carried out to evaluate and raise the energy efficiency of wood frame house. The commercial solution program CE3 (Construction Energy Efficiency Evaluation) was used for simulating the energy consumption in the single-family wood frame house. The results showed that the annual heating energy demand of the house was 160 kWh per 1 m 2 floor area. In order
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