We were in a restaurant last night and all tables were single slab tables 3 to 4 feet wide. Fir with fairly wide growth rings.
My brother commented that there is a single slab picnic table in Avery Park, Corvallis that is 85 feet long (or 93 feet) depending on the reference source.
This shelter in Avery Park & Natural Area is a popular choice for parties and weddings. It features a massive picnic table and is close to the dinosaur bones and the locomotive.
www.corvallisoregon.gov
Apparently installed in the mid 1980's.
Not 200', but it still would have been a unique load to haul.
Looking at that, it appears to be a very unique load.
The two trucks appear to be chained together, but with some slack in the chain.
The log appears to be chained to the front truck, but in a way that it can pivot, but not roll.
The crosswise log on the second truck may be designed to roll back and forth as the distance between trucks changes. And, I don't think either the crosswise log, nor the long log are actually connected to the second truck. The log appears to have a bend near the small end, but perhaps that helps hold everything together.