There was no correlation between hem-fir veneer visual grades
and stress grades. With the equal volume breakdown for the three
hem-fir E grades (high E1, medium E2 and low E3), the LVL made
from E1, E2 and E3 grade veneer could meet 2.2E, 1.8E and 1.5E
grade product market requirements, respectively. The pressing
time changed clearly with the LVL lay-up (or veneer E grade).