My son and I have been sorting, splitting and re-stacking about a cord of wood that the previous owners left for us. It was cut to all manner of dimensions; some very short and some way too long for the new stove. The pieces that are too long run up to about 30". I'd like to cut these in half to fit my firebox. This may seem simple to the experienced woodcutters here, but I'm not sure the best way to take a saw to them. How do I safely (!) get a grip on them so that I can use the chain saw? I'd like to get them off the ground, to protect the chain, but am worried about stability.