I guess I'm the guy you're looking for....[
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I call this my "shows it all" photo. You can see the benchwork, 1/2" hardware cloth and the landscape fabric. I use 1-1/2" deep lattice roadbed as well as 2x4 "arm rests along the edge for dirt and ballast retention as well as securing the edges of the screening and fabric. This gives me landscaping on top to a nominal 1-1/2" depth. It probably isn't necessary to be this deep but I like the flexibility it gives me. The joists (cross members) are on 16" centers and lege are installed approx every 4 feet. The file below shows the details.
Below is a link to the pdf that Steve Conkle did of the first 3 or so years of the construction of the POC. It's a large file so if you only have dialup it'll take quite awhile to download.
http://1stclass.mylargescale.com/stevec/POC RR/POC_Main.pdf
If you need any help feel free to email me.
I call this my "shows it all" photo. You can see the benchwork, 1/2" hardware cloth and the landscape fabric. I use 1-1/2" deep lattice roadbed as well as 2x4 "arm rests along the edge for dirt and ballast retention as well as securing the edges of the screening and fabric. This gives me landscaping on top to a nominal 1-1/2" depth. It probably isn't necessary to be this deep but I like the flexibility it gives me. The joists (cross members) are on 16" centers and lege are installed approx every 4 feet. The file below shows the details.
Below is a link to the pdf that Steve Conkle did of the first 3 or so years of the construction of the POC. It's a large file so if you only have dialup it'll take quite awhile to download.
http://1stclass.mylargescale.com/stevec/POC RR/POC_Main.pdf
If you need any help feel free to email me.