Drying specimens were incised with three incising densities: 0 (unincised), 1,250, and 2,500 holes per [m.sup.2].
Three replicate specimens were used for each incising density.
An analysis of variance F test also indicated that the MOR averages of Table 5 for the three surface preparation methods (63.5 MPa for washing, 68.8 MPa for incising
, and 67.1 MPa for control) were not statistically different (P = 0.2098), suggesting that incising
and soap washing had little influence on the strength of the laminated beams.
The effects of priming and incising
on CCA-retreated utility pole wood beams were investigated in previous studies (Piao et al.
In comparing delamination of the utility pole beams (Table 8), the Pole 2 beam exhibited the least amount ofdelamination of the three beams in each surface preparation group (priming, incising
, and control).
The three surface preparations (control, incising
, and priming) were randomly assigned to the three clusters, with all of the groups within the same cluster receiving the same surface preparation.
the veneer had no significant effect on plywood strength.
is a pretreatment process in which small incisions, or slits, are punched into the wood surface.
Each board was then cut into four 300-mm-long sections that were segregated into eight groups, one per treatment chemical and incising
condition for each species.
at the lathe, a new technology developed at Forintek Canada Corp.
Forintek Canada Corp developed an incising
system in 1986 that could incise green veneer just before entering the veneer dryer (Walser and Clarke 1991).
One solution is the use of mechanical incising
to increase the amount of end grain that is exposed during treatment.