Ed T,
Current OSHA, SAE standards support what you say. But once upon a time a company called Ford Motor Company, during the period from 1964 thru 1967 did in fact use lift trucks to pull a train of trailer scarriying engines on stackable skids from the engine plant to the Dearborn Assembly Plant in the Rouge complex. How do I know this, I was there working 67 hours/week during those summers at the Dearborn Assembly Plant making $2.67/hour and helping Henry Ford build Lee Iaccos Mustangs & earn $$ for my college, tuition, R & B, books & entertainment. Ford had very strict safety standards for their lifts publsihed in there ZA-1 & 300-A standards. Fast forward a few years 1969 OSHA came into effect, in the late 70's visited two Anchor Hocking facilities one in Ohio, the other in PA - they used forklifts fitted with glasspack handling attachments to pull packaged glassware on a train of flat bed trailers (8-10 as I recall) to the shipping dock. But by the mid 1980s lfit truck sompanies no longer condoned this practice.