A shuttle valve 10 includes a valve body 11, a first inlet port 12, a second inlet port 13, an outlet port 14, and a shuttle poppet 15. The freight load carrier has a rectangular carrier base with a longitudinal axis having a top face, bottom face, first and second ends and first and second side rails wherein the top face is configured to receive a freight load pallet thereon. Non-uniform shear stresses can be generated in the elastomeric bonding material, due to the thermal expansion. The controller sends a signal to the stepper motor to rotate the drive shaft a predetermined number of steps, based upon an inputted dispense amount.