On level concrete ground and smooth paved surfaces, 4-6" should be high enough to clear most bumps and inconsistencies on the outdoor pavement. And then one may be required to elevate the forks to clear some hurdles when travelling on uneven pavement outdoors. Oddly enough though, this questionnaire was done up by a firm that only uses their lift trucks indoors, on level concrete surfaces, so I am baffled. Anyhow, I covered everything well beyond their imagination, so I need not worry.

I suppose there is not genuine consensus, or immediate knowledge applying to this so-called 8" rule, so I feel more comfortable.

Thanks everyone.

Danny