Building a bunker under my base

[mfj]

So I would like to store vehicles under my base. I'm not well versed at all in this department and would be very paranoid to start digging around underneath my base. Could anyone explain what kind of support would be needed to avoid it all collapsing? Let's say I want a 14x14x6, is this possible? If so what kind of design will I need to use? Thank you help much appreciated.

[simon]

TBH i would not dig out under my base after i have built on top. Digging out underneath then building on top even with enough support would be risky. The issue is that the SI (structural integrity) checks in all directions and under ground cavities can cause issue and cause structures to collapse even if they have enough support under them. Best off to the side of the base and dig under ground if you see what i mean.

[seven]

I agree it would be safer to build the bunker first then the base on top, but if you are careful it can be done. I would recommend manually backing up your save first. Do you mean a space 14 wide, 14 long, 6 high? I don't think that will work unless you have supporting pillars or walls in that space.

[mfj]

Yea that's what I was thinking Seven, doesn't seem like it's worth the risk, I'll try something else. Thank you for the responses :)

[Nimbull]

You could build something say 3+ layers bellow the rock level under your base if you keep things small and have proper supports. Maybe make alcoves for your vehicles that are like 3x3 or 3x4 with walls on three side of them and a main driveway of sorts out to the surface. The walls between vehicles will help keep the support for the base above. The further down you go the more you have of solid material helping to keep things steady. Then you can have a 1960's bat cave exit somewhere outside of your base where the vehicle can come popping out.

[OH! MY CAR]

Originally posted by kms:

So I would like to store vehicles under my base. I'm not well versed at all in this department and would be very paranoid to start digging around underneath my base. Could anyone explain what kind of support would be needed to avoid it all collapsing? Let's say I want a 14x14x6, is this possible? If so what kind of design will I need to use? Thank you help much appreciated.

I usually always have a spot at bedrock under my main horde base... but I usually just dig at a 45 degree angle downward, so it only takes up 1 tile in my base floor, for a hatch.

The spot underground itself is then offset and does not really affect the stability of my base at all.

Not sure about supports, but pretty sure you can dig a 14x14x6 at bedrock without any need of supports. I dig out large areas only 3 high and never bother supporting it.

Since you can carry your cars in your pocket, you only need a 45 degree tunnel large enough for yourself to walk through, which is usually only 2 blocks.

[Jolly]

How good are you at structural engineering?

[BobthenotsoGreat]

As long as you have support pillars that are 13 apart (11 internal) from floor to roof you should be fine. These support pillars should be one tier higher then the strongest material that you support. So if you do not floor out with anything but wood, cobble pillars will be fine. If cobble then you need concrete pillars, etc.

That's for structural stability, however, zombies have engineering degrees and will tunnel through dirt and gravel if the path for them is easier so it may not be safe to do so unless you seriously strengthen the side walls.

If you look at the info of each type of block, it will tell you how supportive the block is.

A good way of doing a ramp would be the 30 degree blocks and using 4 garage doors placed horizontally that opens from a camera sensor. This will close immediately after you leave / enter. Then have additional doors that open / close at the bottom of the ramp the same way. This "should" provide enough HP to remove that as an option for pathing as long as you give them an easier route (less HP and more direct) into the base.

[Trooper Bri]

Originally posted by BobthenotsoGreat:

As long as you have support pillars that are 13 apart (11 internal) from floor to roof you should be fine.

That's quite a bit more than I trust. I wouldn't want more than 7 or 9 blocks between vertical supports. 7 being my preferred spacing. Learned my lesson from the odd chunk loading collapse.

You can dug out under your base if you know what you're doing. Just place down temp frames next to the vertical support on a couple sides before you undercut it. 7D2D structural integrity isn't rocket science. You just have to know it's reasonable limits. Capp00 on YouTube has some great SI vids on how it works.

[Jolly]

Originally posted by Trooper Bri:

Originally posted by BobthenotsoGreat:

As long as you have support pillars that are 13 apart (11 internal) from floor to roof you should be fine.

That's quite a bit more than I trust. I wouldn't want more than 7 or 9 blocks between vertical supports. 7 being my preferred spacing. Learned my lesson from the odd chunk loading collapse.

You can dug out under your base if you know what you're doing. Just place down temp frames next to the vertical support on a couple sides before you undercut it. 7D2D structural integrity isn't rocket science. You just have to know it's reasonable limits. Capp00 on YouTube has some great SI vids on how it works.

The house OP has already built would weigh too much between pillars, so idk what Bob was talking about.

[Mardoin69]

I usually build my underground garage beside my base with enough room between to drive through between. Then it's underground too but, I use a pole with ladder going up to 2nd story level and catwalk across to base. This way, if Z's do get into my garage somehow--which I've never had happen--then they won't be undermining my base. Trick is....since you need an open ramp going down into the garage, place hay bales down inside the ramp to fill it in when you're not using your vehicle. Then Z's just walk across top of bales and continue on......instead of getting stuck down in there and trying to beat the garage door down to continue through.

[BobthenotsoGreat]

Originally posted by Jolly:

Originally posted by Trooper Bri:

That's quite a bit more than I trust. I wouldn't want more than 7 or 9 blocks between vertical supports. 7 being my preferred spacing. Learned my lesson from the odd chunk loading collapse.

You can dug out under your base if you know what you're doing. Just place down temp frames next to the vertical support on a couple sides before you undercut it. 7D2D structural integrity isn't rocket science. You just have to know it's reasonable limits. Capp00 on YouTube has some great SI vids on how it works.

The house OP has already built would weigh too much between pillars, so idk what Bob was talking about.

It would work as long as you follow the structure rule. So you dig down each pillar in a 2x1 upgrading as you go. It must go floor to ceiling or you lose support as you go. 1 space for you and 1 space for the pillar, 1 z level at a time. I have done it with a mining pit and had a full base on top. In essence you add all the support piles before you dig out the hole.

Its essentially how I build my hoard bases. I build the pillars 1 Z level under the ground and everything else is just on soil in the beginning. As I go further into the game I dig down further 1 pillar at a time and reinforce as I go to counter demo's. It's expensive though in mat cost but you need less support and I have steel/ concrete in abundance then so np.

Although I do recognise the point that an existing base is there therefore whilst the biggest span is 11 internal, the support pillars in his case would be wherever he has floor to ceiling structures already.