how to make a PVC alice pack frame 

I like the way that you did this but you need to heat and slightly bend the top of the frame towards you for the pack to sit right on it like they have on the original frames for the padded sleeve to go over the frame that way it will it will stay on better and not slip off.

Im going to use this for my ghostbusters pack! How did you use the heatgun to vend the pipe

You might want to grab a MOLLE kidney belt, 10-15$ shipped on ebay and worth every penny. I have one on the original PVC Alice frame!

Alsouse6 tree's and 6 elbows instead of 4 of each the lower part will have 2 tee's with a small piece in between for attaching the pack better and that way your frame will be square on the shelf and be stronger and still lite in weight.

i think in my other video i have a belt from a high end backpacking pack that i ut on there its gel and it works well. thank you for the comment!

How durable is the frame ?

Im sure you can build it too guys. Just look for WoodPrix page