|name=Marble Bridge - Double Bracing
|image=none
|main=*48 30 [[Marble brick]]
*30 [[Mortar]]
|foundation=no
|ballast=no
|filler=*40 24 [[Rock shards]]
|roadway=*1 [[Marble slab]]
|wall=*10 [[Marble brick]]
|keystone=no
|result=*Bridge Double Bracing
|skill=Masonry