On the Construction solo Egg Wars map the block height is 161. I assumed that it was the height of the highest natural block on the map, but on this map it was way higher than anything else. I'd suggest reducing it as people could camp there and be untouchable by shooting off anyone who builds up without any larger natural structures to catch their fall.
p.s. An example of a "natural" structure would be a crane on Construction.
p.s. An example of a "natural" structure would be a crane on Construction.