Tires off ground question

[AikenRacer]

Every now and then when I level the mh, a tire will end up being off the ground. Keep in mind, this is a tag axle. This has never bothered me until I started seeing others spend a lot of time driving onto wood just to keep tires from being air borne. Just read an article in the new Motorhome magazine page 64 and it says "If any of the tread is unsupported, it can cause internal damage that may not be obvious at the time." At my job I see huge cranes all the time, set up for days, with all their tires off the ground. In fact this is the proper protocol for cranes. So where's the problem? Someone please inform me. If I have to carry lumber with me for this it will greatly add to the aggrivation and time in setting up....but I don't want to tear up my tires. Comments??

[Terryallan]

Wonder if it was the ires being damaged, or the frame of the MH being damaged. It is what takes the strain. Imagine jacks all the way to both ends, with the middle swinging in the air. Could it cause it to flex? It does on trailers.

[timmac]

That article has to be wrong, sometimes I just don't know who writes these things, what about all the times cars are on lifts for repairs, what about spare tires, etc, etc, sounds crazy to me..