Edgewise static bending properties of yellow-poplar laminated veneer lumber: Effect of veneer-joint designs

被引:0
作者
Lee, JN [1 ]
Tang, RC
Kaiserlik, JH
机构
[1] Auburn Univ, Sch Forestry, Auburn, AL 36849 USA
[2] Georgia Pacific Corp, Engn Lumber Prod, Roxboro, NC 27573 USA
关键词
D O I
暂无
中图分类号
S7 [林业];
学科分类号
0829 ; 0907 ;
摘要
The effect of veneer-joint design on the static bending properties of laminated veneer lumber (LVL) commercially fabricated with rotary-peeled full-size yellow-poplar veneers and liquid phenol-formaldehyde resin was investigated Two types of veneer-joint design (scarf and crushed-lap) commonly used in commercially produced softwood LVL products were considered in this investigation. Three groups (25 in each group) of 96-inch- (243.8-cm) long LVL specimens, randomly selected from a large sample population, were prepared for this study. Group I specimens had scarf veneer-joints, group II had crushed-lap veneer-joints, and group III had no veneer-joints and it served as the control. All specimens were preconditioned and equilibrated in a computer-controlled environmental room at conditions of 65 percent RH and 75 degrees F (23.9 degrees C). Edgewise static bending tests were conducted to determine their stiffness and strength. Results showed that yellow-poplar LVLs with crushed-lap veneer-joints are as stiff and strong as those without veneer-joints, but members with scarf veneer-joints had relatively lower mechanical properties. However, significant differences were observed between the specific stiffness and specific strength. Further, statistical analysis showed that yellow-poplar LVL's stiffness and strength probability can be adequately described by a lognormal distribution.
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页码:64 / 70
页数:7
相关论文
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