</font><font color="blue" class="small">( Just poured a new floor, with fiber mesh in the mix and reinforcing wire. The tractor will fit into the garage! I have assumed that my 4 inch thick garage floor would handle the weight of a tractor. Will it??????????
Bob )</font>
Bob,
4 inches is plenty thick for parking your tractor on.
I have a parking pad that came about by accident when the cement trucks delivering the mix for my home had 4 extra yards. I just had them dump it where we park and smoothed it out. No rebar, wire or anything.
I put my 14,000 backhoe on it all the time.
The most important thing to keep your pad from cracking is to pour it on a solid base. If your dirt settles or moves underneath, then you risk cracking. The reinforcement is to handle spreading the load out over a larger area to avoid putting all the preasure on the areas the settle or move.
Eddie