How about a high school woodwork bench?
I scored this up on the weekend... What a PITA ... I managed to back the car trailer under it after slinging it from the middle to lift it with an engine crane (it's VERY heavy) ... Then I did the same thing to get it off in my shed ... The bench top is about probably 4" thick with a plywood top sheet (I guess the idea is you change the top sheet as it gets battered).
https://www.aulro.com/afvb/images/im...015/12/691.jpg
https://www.aulro.com/afvb/images/im...015/12/692.jpg
https://www.aulro.com/afvb/images/im...015/12/693.jpg
It's 4meters long ... it was hell of a job to re-arrange the shed to get it in in 33degree heat. I'll probably have everything put back away by the end of the week though. The only problem is of course it's not really high. If that ever bothers me I'll just throw a couple of railway sleepers under it to lift it up.
seeya
Shane L.