Gluability of Sanded Lumber

Data show that sanded Douglas-fir and southern pine lumber sanded on present high-speed commercial sanders when glued will not pass tests for structural water-resistant gluelines. Sanded ponderosa pine can be glued for these applications. Techniques for detecting and evaluating the problem with physical tests and microscopical analyses are presented. Accelerated aging physical tests are required to detect a difference in glueline performance between sanded and knife-planed lumber. Microscopical analyses indicate increased gross surface roughness and cellular damage of sanded lumber as compared to knife-planed lumber. Effects of on-line processing variables such as feed speed, belt speed, grit size, and amount of wood removed per stage are discussed. Possible technical solutions to make sanded Douglas-fir and southern pine structurally gluable are presented.

You must be logged in to download any documents. Please login (login accounts are free) or learn how to Become a Member