I've stored my powder in an ordinary lower cabinet in my basement for over thirty years. No muss no fuss, nothing fancy. It's still as potent as it was when I was buying IMR-7828 in one pound tins for $15!
Looks very nice. As you pointed out you door works as a blow out panel, so someone looking at this shouldn't add a lock to the door unless they add a blow out panel on the side or the back.
Good effort. Thanks for posting - Now I am going to be picky. One inch of solid wood is an excellent insulator up to around 350 degrees. The glue and resins used in plywood may render it less than ideal as they may turn to a gas and burn? Just a guess. The cement board is an excellent idea. I'd add at least an inch of overlapped dry wall (1/2 inch sheet) to the outside of the wood. Drywall is mostly gyprock and would insulate the wood for sometime. Or, one could use double wall construction and fill the gap between with liquid gyprock. The gyprock does not burn - it releases water vapour to protect the contents. I'd be careful with any paint as most will burn. In Canada, metallic hinges or nails or screws are illegal for powder safes. And the Feds want wheels on the box. (Just who is going to stop in the middle of a fire to wheel out a box of highly flammable solids in a box designed to come apart causes me to wonder about the idiot who wrote the gov. specs). The box is required to have weak seams but be secure. I think I'd peg and glue the edges and bottom using rabbit joints. Then fit the lid in a way to block heat transfer but be able to blow off. Good effort and thanks again for posting for the rest of us.
Great ideas. good job. I've been procrastinating building a proper storage box for my powder and yours is very much what I had in mind and more. will you build a similar box for primers? thanks.
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I've stored my powder in an ordinary lower cabinet in my basement for over thirty years. No muss no fuss, nothing fancy. It's still as potent as it was when I was buying IMR-7828 in one pound tins for $15!
Looks very nice. As you pointed out you door works as a blow out panel, so someone looking at this shouldn't add a lock to the door unless they add a blow out panel on the side or the back.
Good effort. Thanks for posting - Now I am going to be picky. One inch of solid wood is an excellent insulator up to around 350 degrees. The glue and resins used in plywood may render it less than ideal as they may turn to a gas and burn? Just a guess. The cement board is an excellent idea. I'd add at least an inch of overlapped dry wall (1/2 inch sheet) to the outside of the wood. Drywall is mostly gyprock and would insulate the wood for sometime. Or, one could use double wall construction and fill the gap between with liquid gyprock. The gyprock does not burn - it releases water vapour to protect the contents. I'd be careful with any paint as most will burn. In Canada, metallic hinges or nails or screws are illegal for powder safes. And the Feds want wheels on the box. (Just who is going to stop in the middle of a fire to wheel out a box of highly flammable solids in a box designed to come apart causes me to wonder about the idiot who wrote the gov. specs). The box is required to have weak seams but be secure. I think I'd peg and glue the edges and bottom using rabbit joints. Then fit the lid in a way to block heat transfer but be able to blow off. Good effort and thanks again for posting for the rest of us.
Great ideas. good job.
I've been procrastinating building a proper storage box for my powder and yours is very much what I had in mind and more.
will you build a similar box for primers?
thanks.
dont use styrofoam... use drywall
Fire, only problem I see is its made out of wood with Styrofoam once through wood. Styrofoam is like napalm.
Don't use Styrofoam - it is a source of static which can detonate the powder.
I like the box but the styrofoam needs to be removed. Ever seen a styrofoam cup in a campfire?