Here you can find several wooden elements and them variations, also several kinds of bracing were included too. And several examples which you can use in your project.
Triangles counts:
Bracing - 2740 tris
New planks - 72 tris
Old planks - 920 tris
Round pillars new - 312 tris
Round pillars old - 472 tris
Square pillars new - 176 tris
Square pillars old - 552 tris
Sticks - 486 tris
Arches - 572 tris