Flatbed Deck Height History

Mine is like 58" and some change (I just call it 60"). Can't say I remember seeing anything lower than that on a standard flat. Must have been spring ride?

 

I don't think there is a "standard" deck height for flatbeds. There are a number of variables; The size of the tires on the truck, fifth wheel risers, suspension etc. There are also trailer variables; all aluminum or steel for example. I think there can also be differences between manufacturers. I know that I always liked Western curtain vans for their low deck height among other reasons.
I think you might have to request a certain deck height if you are shipping something tall.

 

No standard tail board height on any trailer. I’ve got older flats ( a 1950 and 1988) that sit higher then most newer ones only because they are spring ride and have 11r24.5’s on them. All your modern built warehouse and delivery docks make up for the infinite difference in trailer rear heights with dock levelers/plates that bridge the gap between the two.

 

dock boards - Google Search

one of these is what you need if you have a dock that does not have a built in leveler plate.

 

Just for poops and giggles I went out and measured a 1947 i got in the yard and it measures 45-1/2 with spring ride and 10.00-20 tires. Which is the same as modern 11r 22.5’s. That was probably pretty common in those days. Lol. Thats also lower then most fifth wheel plate height's as well which are generally 48” give or take 3 or 4 inches either way.

 

All I know is we pick up 8'6" shipping containers and they're right at 13'6".

 

What you need to do is tell the dimensions and weight of the load to the broker or carrier and let them figure out what they need to haul the load. That puts the ball in their court and it’s on them if they can’t haul it.
I got burnt one time like you. I just tell them what I need moved and let them figure out what equipment they need.