I know this is a weird question for an electronics forum, but I think there's at least a handful of people here who know something about this.
I want to build a large lean-to shed, an extension to the back side of my detached garage.
Details/assumptions:
I'm trying to evaluate #1 if pier & beam will even work for me, in my sometimes-soupy soil, and #2 if so, what size beams and how far apart should be they be.
I can't seem to find anything resembling an official guide, so in absence of that, all I have to go on is my gut. my gut says:
I want to build a large lean-to shed, an extension to the back side of my detached garage.
Details/assumptions:
- I live outside city limits and as far as I know (I could be wrong) I don't need the blessing of any building inspector to build my shed.
- As far as I know (I could be wrong) as long as I don't attach the lean-to to my garage, it won't affect my homeowner's insurance.
- Where I live, it doesn't even freeze every winter, and if it does freeze, you can count the freezing days on two hands. As far as I know (I could be wrong) the term "frost line" has no meaning here, and I don't need to design the roof to hold snow.
- No snow, but this is hurricane country.
- The footprint of the shed will be about 12'X36'
- I will be storing some pretty heavy things in there (engine blocks, a large lathe, steel boxes of scrap iron, etc.)
- This is flat country and water doesn't drain well. Soil is black dirt that turns into black mud. Things tend to sink in it.
- I am building this on a tight budget.
I'm trying to evaluate #1 if pier & beam will even work for me, in my sometimes-soupy soil, and #2 if so, what size beams and how far apart should be they be.
I can't seem to find anything resembling an official guide, so in absence of that, all I have to go on is my gut. my gut says:
- 8X8 piers are bonkers. No way I need that.
- 6X6 piers are probably closer to what I need.
- I might be able to get away with 4X4 piers if I place them close together (like 4' between piers) and use a wide bottom in my holes to get a lot of surface area. This might be better than using bigger piers, farther apart, because:
- given my soil conditions. it will give me more points of load distribution, maybe preventing soup-related problems (ex: one corner sinking into the ground)
- Given my hurricane prone area, there will be more anchor points to the ground, making it harder to blow away.
- The piers will be much cheaper and It will allow me to use smaller, cheaper beams (ex: 2"X6" instead of 2"X12"). although this will probably be offset by the cost of all the extra concrete
- This will make the whole project a lot more manageable for one dude to do by himself with no assistance from heavy machinery