Advice for a Second Level

I did a second level using half inch plywood with 2 X 4's fastened with 2 one inch and half long wood screws in each 2 X 4, bottom and top. My layout is a lot bigger than a ping-pong table. Also to consider is how you will run wires to the second level, along side the 2 X 4 with nylon cable straps or in a small piece of tubing.

Lee F.

I would recommend 1/2 inch plywood screwed into 1X4 piers screwed into the homasote/table.  I would then glue one inch thick foam to the plywood for sound deadening.  Less mess than cutting homasote, really strong construction, and won't be affected by changes in humidity.  Depending upon the track that you will be laying, cork roadbed (glued to the plywood) could be substituted for the foam.

Poppyl 

Yeh, I would use at least 1/2" plywood. I don't think you really need 2X4s as supports - 1X4s (maybe even 1X3s depending on the width of your subroadbed) is just right.  But if you have the 2X4s on hand, by all means go ahead and use them.

Thank you Lee, popyl and trainsrme for your suggestions.

Going to go with the 1/2 inch plywood with the 1X4 piers.  Haven't really tried cutting the homasote yet but if its a pain will go with the foam.  Would the foam grip the screws on the tracks? I would be using 0-27 track due to space limitations.

Really like Lee's idea of using plastic pipe to run the wires to the second level.  Good thinking would have never thought of it.

George