Adding piers to existing cabin?

[Goat boy]

Got myself in a pickle to put it lightly

Started off with this

http://countryplans.com/smf/index.php?topic=13536.new%3btopicseen#new

Didn't do what don p suggested and weld pipe that extended through the pier to the footing due to the original idea of this not being a dwelling. Once it's tied into a foundation then that line is crossed.

Anyways fast forward 2 years and diy weekend builder goat boy has his home resting  on blocks and fir rounds and he doesn't feel safe moving in. Everything is still level, but who knows how long before sinkage starts to happen, better to deal with it now then when that actually starts happaning. Fir rounds I have in are starting to get pressure cracks due to me neglecting to put in perpendicular 2x boards  inbetween frame and round to spread load. Trailer is sitting on sandy soil.

Thinking I should por some cement and tie the building in but it's not an easy task after the fact.

thinking piers to the steel trailer beems.

Few questions for anyone, do I need some sort of buffer between the concrete and steel?

If I don't weld, then what kind of fastener to attach the pier to beam?

The cantilever is about 24" with 5' between beams. weight on joists is not a worry for me but is there any tiipping worries provided i prevent any sinkage?

And lastly, how the he'll do I get the concrete into the form if the form goes right up to the beam? Hand garden shovel........

Not proud of the position I have got myself in but time to start digging my way out.


[img=http://s24.postimg.org/tmh9cx2r5/20160320_100554.jpg]

http://s12.postimg.org/6u8crc05p/20160320_100831.jpg

http://postimg.org/image/tmh9cx2r5/

http://s13.postimg.org/5bo4tv1ev/20160320_100754.jpg

http://s22.postimg.org/vdgewh0vl/20160320_100727.jpg

Hope you can see the pictures

[Goat boy]

Pressure cracks to one of the 6 30" diameter rounds

http://s18.postimg.org/mf3t9hu0p/20160320_100627.jpg

Some inside glamour shots

http://s12.postimg.org/ljh8w3u19/20160320_101137.jpg

http://s11.postimg.org/964epa4df/20160320_101045.jpg

[akwoodchuck]

Wood can carry an insane amount of weight....I jacked up a 1.2 million pound fuel barge and set it on 6x6 cribbing a few years ago....with no adverse effects to the timbers. Those "stress cracks" are likely just normal checking due to shrinkage....plenty of cabins in this area sitting on spruce stumps for 40- 50 years or more....

[Goat boy]

Ya the cracks don't actually line up with where I visualize the load bearing points being.

Guess I'm visualizing the trailer frame acting like a splitting maul though.

The trailer is sitting on a slight slope that drops about 2' over the 28' span of the home. I guess I'm also concerned that erosion can occur and the blocking will slide...though a good drainage set up could curb some of this. Water dosen't get under the trailer and no pooling occers either.

The last concern is an earthquake shaking the whole thing of its blocks. Just trying to figure out the best system with what I'm working with.