It has a great fire rating at is about 5 lbs less a sq ft then regular concrete. If your worried about weight but still want good fire protection you can use 4" block (instead of 8") and fill it with gypcrete (instead of regular concrete) Same goes for the lid. <- if you consider this a secure closet or safe, this may not apply but I'd check first. Inadequate footings combined with inadequately hard subsoils and tying the walls into the foundation could have this effect.ĭon't building codes require two egress points (ways to get out) from rooms that can be occupied. You don't want to cantilever all this extra weight off of the foundation, then have it crack your foundation. Get the roof and wall design worked out, then check your footings. What's it weigh? How do you plan to carry the weight without sagging?ĭesign from the roof down, then build from the ground up. Think carefully about how you pour and consolidate the concrete, given the existing floor above.Įven so, you need a structural design for the ceiling. To me, this sounds like the best option proposed, so far. I would also put a raised concrete pad in the room to set safe on if basement ever does flood. You can also add an intumescent fire stop strip to the bottom of your door.that way if fire hits it will seal up. Don't forget to fill your metal door frame. Use 3" metal roof decking with mesh for the ceiling and pour concrete on top of that. Have rebar run through cores and pour full. It will comply with all building laws at a minimum. Live in Midwest and can use it for tornado safe room also. I will build test walls and see how they hold up to different firepower and fire too. I get all contstruction material at contractors cost with my labor free so going overboard on material isn't really a concern. I am going to put vents to the outside of house (maybe big enough to look outside) and video security system to the outside of room and house with batteries and inverter. Door to the rest of the basement will be an exterior steel door with an additional 3/8" steel installed behind it to slide behind it when inside. Interior walls filled with rock and quickcrete. On inside 14gauge steel sheet and 3/4" plywood and 1/2' gypsum drywall. Fire blocks will be put in place above house steel beam with durock going all the way to the bottom of the next floor. Bottom of stud will be glued and shot to the concrete floor while top plate will be glued and shot to house main steel beam. Walls are to be constructed of steel studs on 12" centers with 2 layers of 1/2" Durock on outside and 1/2" gypsum board. I might even put 14 gauge steel sheets between sets of joist as I was going to put it on the walls too. Then maybe 2圆 roof joist on 12" centers up against that but not comnnected to the floor joist with insulation and another layer or two of durock and 1/2" or 5/8" gypsum board. Currently, I have open 2x10 floor joist above and was looking to put insulation between the joist, then 1 or 2 layers of 3/8 Durock up to the ceiling.
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