Because of size constraints in my room, I need a platform for my queen size bed that is the exact footprint of the bed (60" x 80"). I've decided to attempt to build it however I have no experience with this and hopefully someone can point out any flaws in my plans. I've attached an image showing how I'd like this to work. The colored items are as follows: Red - 2x4 60" in length. 2 pcs Blue - 2x4 77" in length. 3 pcs Green - 6x6 10" in length. 4 pcs Not shown - 1x3 60" in length. 12 pcs (slats) The plan is as follows - make a rectangle out of the red and blue pieces with the 1.5" side of the 2x4's parallel with the floor for maximum load bearing capacity. The blue pieces will be anchored to the red with 2 screws on each end, so a total of 12 screws will hold this rectangle together. Then, the 6x6 posts will be put inside each corner and will be anchored by 6 screws per side or 12 per post. The tops of the posts will be even with the top of the 2x4s. Once this is done the 1x3 pieces will be laid across the top with about 3" of space between them to support the mattress. If all that makes sense, my questions are: Will this be enough to support me, my gf and mattress? 280 lbs for the 2 of us plus another 100 or so for the mattress (and some occassional, ahem, wrestling)? Will support be needed in the middle? Will the screw points be enough? What size screw should be used? What are the chances of this loosening up over time?