Step 1: Simple Fence
First you simply add a fence. Isn't it easy!
Step 2: Nether Easy
Next you add nether rack.
Step 3: Fire and Trapdoors
Next you add trap doors then close them.You'll need to set the nether rack on fire so it doesn't fade away.
Step 4: Finish!
You are all done so you use this a furniture!
Step 5: No Wood Confirmed
Make sure you don't use it next to any wood kind of blocks or else they'll break!