posted on Apr, 8 2012 @ 04:49 AM
Don't forget that the thing needs to be painted with some sort of rubber coat to protect it from moisture/rust. You also need to be prepared for bad
air in there from a lack of airflow that could be fatal. You'd be amazed at how bad the air gets in those things, just take an atmospheric monitor in
for a look. Even under-road stormwater drains when dry and with slight air flow through them will usually only have about 96% of standard O2 in the
air. I do a fair bit of surveying in old drains for rehabilitation with atmospheric monitoring gear, it's survivable but you get a cracker of a
headache after a few hours. All the old manuals on bunker construction from the cold war show some sort of wind up air recycler, I'm not sure
where/if you can get them anymore?.
Also consider drainage and some sort of sump drainage system as there'd be a hatch/ladder/stairway that will need to be watertight to prevent
flooding. There has been a big push for bunker construction in Australia for bush fire protection and the rules/standards have been tightened greatly
after a fair few people died in their home made jobs after the Victorian fires, not from the fire but bad quality air after they shut themselves in
for "protection". be careful if you're going to do a back-yarder as if the council finds them they'll make you fill it in... Hence if you're
going to do it, make sure it's finished in a week and covered with roll out grass etc to prevent you getting busted by overflying aerial photograph
planes that councils use to check for illegal construction.