What mod are you on? If its anything other than Dayz Chernarus 1.7.7.1 the stash wont be placed, cause it doesnt exist. you'll need to change what spawns. It doesn't blow up for the person who places it, either. Only for other people. Now that being said, it is still placed and will still explode if someone walks by. and yes, you can change it to where they need nails, etc