Small Cabin

Small Cabin Forum
 - Forums - Register/Sign Up - Reply - Search - Statistics -

Small Cabin Forum / Cabin Construction / 16x20 foundation
Author Message
Jeremy
Member
# Posted: 9 Mar 2014 22:04
Reply 


I am looking for advice on a materials list I have put together for a 16x20 cabin our family will be starting this spring. I want to get off on the right foot so any tips/advice will be greatly appreciated. I hope to have it framed and dried in by fall. I originally wanted to saw the lumber, dry it, and build with rough cut lumber from the land we are building on. With the lack of time and looking at others skill level compared to mine dimensional lumber may be a better starting point.

I was hoping to start in spring of 2013 but my wife and I found out we were expecting a baby in the fall. This gave us extra time to think, dream and look at ideas from all of you!

So, the foundation... 16'x20' cabin with 8' screened porch, with my beams running 20' in length. Am I right expecting to put 3 beams consisting of (2) 2x10x20' notched into a 6x6x8 post or is there a better solution?

Posts will be set in 4' holes with cement and looking to have foundation at least 2 feet from ground level. Can the joists be toe nailed into the beams or will I need joist hangers?

If I put the porch on right away, can I use 2x6x8 for the joists under the porch? Do I need something more besides the beam from the cabin to support the porch like a ledger board on a house?

I will try to figure out how to post pictures of the floor plans if this may help.

Jeremy
Member
# Posted: 9 Mar 2014 22:07
Reply 


If anyone is interested in the plans I purchased I can email them via a PDF.

VTweekender
Member
# Posted: 10 Mar 2014 12:43
Reply 


Congrats on the baby on the way!!

You would set the 20' built beams on top of the posts that are going 4' in the ground, then build on top the beams....so that your joists rest on top the beams..you would then use rim boards around the outer edge to close it in.....use at least 3 beams , a beam on the outer edges with joists overhanging them on top a few inches, and a middle beam. 4 rows of beams would be more sturdy though. As for the porch, hard to know what you mean axactly, but that span will be springy without middle support.

mongo1
Member
# Posted: 10 Mar 2014 14:27
Reply 


Jeremy,
I just built my 16x20 last year here in Penna.I also used 6x6,s down 40inches and concreted in.2x10,s doubled on the outside and as my middle beam.6x6,s were notched to receive the 2x10,s and carriage bolted together.I used 2x8,s for floor joist(with outside and middle beams added in was less than 8 foot span-actual floor joist span is 7'7&1/2inches) and definitely put on joist hangers.I shot my 6x6,s for the notch cuts with my transit and everything was within a 1/4inch.Figuring that us humans were doing all the cutting.Ha-ha!!My cabin is off the ground about 3 feet which makes good for putting stuff under it.Have fun and have a great day!!

Jeremy
Member
# Posted: 10 Mar 2014 19:19
Reply 


perfect thanks for the advice. Mongo did you use 16 foot joists or did you use 8 footers and use joist hangers on both ends and the middle? or just rest the joists on the middle beam? Did you insulate under the joists?

knock
Member
# Posted: 10 Mar 2014 20:49 - Edited by: knock
Reply 


Jeremy,

I started my 16x20 in 2013.

I used two beams (but used 2x10's for my joists). I also secured my beams directly to the tops of the piers (so I don't have to worry about the wood posts rotting out). May not be an option if you have a sloping grade or want alot of clearance under your building.

Agree with VT that the joists should go on top of beams and to-nails should work, no joist hangers needed. You could always used hurricane clips or twist straps for piece of mind to connect joists to beams.

I insulated between the joists with foam board.

mongo1
Member
# Posted: 10 Mar 2014 21:54
Reply 


Jeremy,
I used 8 footers with joist hangers at ends and in the middle.That was my preference but on top of the beams with floor joists is another option.I have not insulated the joists yet.I was up to the cabin a good bit this winter with some days in the negative degree range and was warm with my woodstove.I do plan on insulating some day and will either cut in styrofoam or do the spray foam method.Good luck and have fun with it!!

Jeremy
Member
# Posted: 11 Mar 2014 02:17
Reply 


I was originally planning on 8 footers with joist hangers, as I feel more comfortable with that for long term durability. I think I will stick to buying almost 60 hangers... 2x10 beams everyone is agreeable with that it sounds like.

If I do insulate it with the roll insulation do you put the paper side towards the ground or the floor decking? I'm going to be putting osb on both sides of the joists. Anyone have any opinions bout mesh lining for insects and rodent proofing?

knock
Member
# Posted: 11 Mar 2014 22:18
Reply 


Jeremy - If you use faced insulation, the craft face goes to the warm in winter side ( paper towards the floor).

MtnDon
Member
# Posted: 13 Mar 2014 14:21 - Edited by: MtnDon
Reply 


Quoting: Jeremy
....plans I purchased...

Quoting: Jeremy
..... I can email them via a PDF


Isn't there an ethical problem here if they were purchased?

paulz
Member
# Posted: 9 May 2014 10:07
Reply 


Quoting: knock
Agree with VT that the joists should go on top of beams and to-nails should work, no joist hangers needed. You could always used hurricane clips or twist straps for piece of mind to connect joists to beams.


I have been wondering about this too. So with joists sitting on beams do most people attach them, toe nail, straps or just let them sit? Building code?

Thanks.

Don_P
Member
# Posted: 9 May 2014 21:38
Reply 


Hmm, building code and where to begin.
A pier foundation is non prescriptive and requires an engineer's blessing per code. Sitting a laterally unsupported beam on the pier is outside of code, look at the girder under the tilting pier thread, and the piers for reasons behind those two.

Prescriptively a continuous perimeter foundation is used. There is no outside girder needed on the continuous foundation wall since there is continuous support. With the floor anchored to the foundation, lateral movement is restrained and a dropped center girder is possible.

Jeremy
Member
# Posted: 10 May 2014 00:22
Reply 


I will be starting to clean up the property tomorrow and plan to have the gravel brought in for the driveway and under the cabin and posts set by Memorial Day. I will attach pictures as progress is made. A critique would be appreciated as I move forward. I hope I can given an example of what to do rather than what not to do. Thanks for everyone's input thus far!

pcroom
Member
# Posted: 23 Dec 2015 01:15
Reply 


mongo1
I was reading one post about how u built your cabin and wanting to ask you a question if you could help me.
Im biulding a 16x16 like barn style but with a regular roof the upstairs will be a full loft ok now my beams are less then 7' foot apart do I need 2x12 for my floor joist because of my second floor and the weight or will 2x10 be fine???

Sheeterdan
Member
# Posted: 23 Dec 2015 09:14
Reply 


Hey was wondering if it's to late to get a copy of those plans. Want to build a cabin and a barn in the near future. But just still debating on size and design. I have a tenisey to over think things . Thanks Dan
Dlsiefer@gmail.com

Don_P
Member
# Posted: 23 Dec 2015 11:47
Reply 


Hi there, here is my email, I would like to conspire to commit federal copyright theft... just sayin

pcroom, you said you own a codebook, span tables are in chapter 5.

pcroom
Member
# Posted: 23 Dec 2015 13:10
Reply 


No I don't have anything that tells me what I should use!

ddurrett896
Member
# Posted: 6 Jan 2016 17:07
Reply 


Can you send me a copy of the PDF? ddurrett896@gmail.com

Blossom80
Member
# Posted: 26 Jan 2016 15:50
Reply 


Jeremy
yea is there a way to get a copy of plans to courtemanchead@gmail.com?

darren
Member
# Posted: 5 Feb 2016 11:20
Reply 


Jeremy

I'd like a copy of the plans, if the offer still stands.

darrensusin AT gmail.com

cscmtp
Member
# Posted: 28 Apr 2016 09:48
Reply 


Jeremy
Jeremy would love to know what your foundation ended up costing. Trying to figure what path to take with our new cabin

Your reply
Bold Style  Italic Style  Underlined Style  Thumbnail Image Link  Large Image Link  URL Link           :) ;) :-( :confused: More smilies...

» Username  » Password 
Only registered users can post here. Please enter your login/password details before posting a message, or register here first.