More like a brick.
More like this:

168 triangles. In the one brick itself. Which would be 84 blb faces.
Top Left is 1x6x5 fence brick. Top Right is fence with 1x1x5's on either side. Bottom is alternating fence with 1x1x5's; keeping out a nudist.
If somebody has the 3D2BLB working properly then I'd be happy to give you the file.