Need help with raise and lowering on objects!

I'm currently trying to fix this issue on my Dayz Mod 1.9.0 server. When players or myself build a object (Like a tent) it is half way in the ground. I would like to have all placeables set to a raise and lower function say like use CTRL+Q to raise and CTRL+Z to lower. Would anyone happen to have a script to do this? Thanks :)

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