A wheel rim includes an annular rim body having a horizontally disposed rim axis and an imaginary central plane that is perpendicular to the rim axis. According to one embodiment, a melter for melting glass batch materials includes a base portion and a rigid exoskeleton rigidly attached to the base portion and comprising a plurality of upright members interconnected with a plurality of cross members defining an exoskeleton interior volume. The operational transconductance amplifier compares this voltage to a reference voltage and injects or removes current from the feedback node of a voltage regulator, thereby altering the voltage present at the feedback node. The replacement is performed and second code is generated based on the replacement of the at least one non-speculative instruction. A table leaf is also provided to fit between two adjacent convertible chairs in the table position, to produce an extended table configuration.