With the bunker, if you built it in a mostly square shape, for example, and put the door in the center of one of the walls, you won't really have a "stacking" problem. My above ground boxes have the doors in the center of one longer wall, and they don't get stuck in there. The torts almost always go in and put their faces into a corner. I just don't think you'd need 2 access points. Further argument against two entry points is that it's that much more space that cold (or hot) air can get in, and also opens up a huge potential for a breeze to blow through (which doesn't happen with one door).
I worked as a laborer in concrete starting at 16 (around school), and worked every Las Vegas summer in the sun since, through carpenter ranks, to foreman ranks then a few years ago got pulled into the office as an estimator. I'm supposed to be doing "take-offs" right now. Don't tell nobody I'm on TFO. But I do have a lot of experience in commercial concrete (we don't do houses at all, just big buildings, schools, hospitals and warehouses). It's good to know. I'm currently refining my masonry block laying skills. 1,200 linear feet of 8' wall to go. Help, anyone?
I worked as a laborer in concrete starting at 16 (around school), and worked every Las Vegas summer in the sun since, through carpenter ranks, to foreman ranks then a few years ago got pulled into the office as an estimator. I'm supposed to be doing "take-offs" right now. Don't tell nobody I'm on TFO. But I do have a lot of experience in commercial concrete (we don't do houses at all, just big buildings, schools, hospitals and warehouses). It's good to know. I'm currently refining my masonry block laying skills. 1,200 linear feet of 8' wall to go. Help, anyone?