lateral displacemnt limit in case of a mobile gantry

huangyhg

lateral displacemnt limit in case of a mobile gantry
hello,
i m wondering what is the limit of lateral displacement of a portal in case we have a mobile gantry. in my case, the nominal capacity of the gantry is 6 tons. so shall i take 1/200, 1/500 or 1/ 1000 ?
many thanks
(sorry for my poor english)
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other than one missed apostrophe, what poor english?
mike mccann
mmc engineering