A paperboard lifting device can be mounted to a plate, support form, work surface or other member of a material conveyance system. The other end of the drive shaft of the second actuator is fixed to the driven member of the first actuator 10 directly or via another actuator, and the first and second actuators are composed so that resonating frequencies of their drive shafts are different from each other. Preferably, a microbicidal agent is also incorporated into the method to provide treated wood products that demonstrate excellent surface integrity, dimensional stability and retention of the infused microbicidal agents for extended periods of time without incurring the detrimental environmental effects of conventional chromium or copper-based inorganic salt preservation methods. 5, the MCR and the CB both being determined using a power law model. The first front face and the second front face are overlapped with the tailgate-attaching frame when the flip gate is retracted.