Bedrock multi tier spike fence floor
Thought I'd post saw some but most all above, this base is base on 13 by 13 squares which solves a bunch of problems most bases have. So the concept is to be a giant corpse separator so zero loot is lost. Each floor is 25 high or so, which makes the zombies die at progressive levels based on their health. The bottom two levels include progressive series of traps which require minimal maintenance or power. Here is list of other problems I've found it solve.
Saving on reset: it is exactly 51 by 51 total and can be saved using max size of envul plot system.
Stability: I have never had a support pillar break because they are all designed to be out of reach. If it does it still doesn't exceed 26 blocks without a support if upgraded properly.
Repairs: if you make all out of concrete it last forever. Because the way each level is designed the zombie ai is tricked to thinking there is a viable path down, and don't attack your walls. Or die trying due to traps.
Logistics: the design allows for a complete multi tier 45 by 13 farm on each side growing way more than is needed. AT BEDROCK. You could farm during horde night and be safe. The electricity is routed through a single tower and 4 battery banks can supply all lighting and defenses. Solar to recharge as well, this is again at bedrock for protection.
Ammo: the pit is designed so you can ride it out without shooting a single bullet, although it's fun too. Every tier is designed to be within range of your machete or axe. Each drop is 25 or higher depending on your elevation so it's overkill.
Future plans: to top it off I built a 51 by 9 runway 25 blocks above top tier for kicks. Lighted runway and gun turrets to keep others out. Of course all this can be kept 25 away from edge so you need some serious building skills to noon it over without dying or getting shot by turrets.
First post I'll try to attach pics.