Foundation evaluation for 2nd floor addition
Foundation evaluation for 2nd floor addition
(OP)
In planning for a second floor addition over the garage and rear section of my home we have found two problems that require engineering solutions to over come the foundation's limitations.
Background: This home is located in South Lake Tahoe, Ca. Live weight,snow load and wind sheir conditions must be accounted for. The living are of the home (circa 1965) is built on a continous foundation around the parimitar, which is 18-20" deep, 18" wide, with a 6.5" stem wall. The subflooring is supporte by piers arrainged in a 4x6' grid. The garage is attached to the house but it's built on a 10" slab, with out a foundation supporting it's parimitar.
My questions are:
1). Can a foundation be poured under the edges of the grarage and the slabe attached to the foundation? if so how.
2). What can be done to the stem wall or foundation to upgrade it's capacity for the weight of a second floor. (I know this is a difficult questions which requires more input as to the beam and framing structure, materails, and of course the soil composition that foundation is sitting on and a few more things Im sure I have not considered.
Background: This home is located in South Lake Tahoe, Ca. Live weight,snow load and wind sheir conditions must be accounted for. The living are of the home (circa 1965) is built on a continous foundation around the parimitar, which is 18-20" deep, 18" wide, with a 6.5" stem wall. The subflooring is supporte by piers arrainged in a 4x6' grid. The garage is attached to the house but it's built on a 10" slab, with out a foundation supporting it's parimitar.
My questions are:
1). Can a foundation be poured under the edges of the grarage and the slabe attached to the foundation? if so how.
2). What can be done to the stem wall or foundation to upgrade it's capacity for the weight of a second floor. (I know this is a difficult questions which requires more input as to the beam and framing structure, materails, and of course the soil composition that foundation is sitting on and a few more things Im sure I have not considered.





RE: Foundation evaluation for 2nd floor addition
I've been to Lake Tahoe - beautiful place. There's also a good bit of relief, so the effect of ground slope also has to be accounted for. My suggestion? Hire a good structural engineer - considering the price of real estate in your area, the natural forces you must deal with, and the complexity of your problem, you need professional help.
RE: Foundation evaluation for 2nd floor addition
RE: Foundation evaluation for 2nd floor addition
Kurt
RE: Foundation evaluation for 2nd floor addition
what I read when I designed foundations for hotels.
Piles are an excellent structural source if your soil
absorbes more than 4%. If I can remember correctly.
Anything over 20 feet requires a 10 inch stem and
at least a 24 inch footing. Its suppose to be 2 times
the stem A/2. 'A' being the stem.
Most of the books I read were written in the 60's
So I am assuming technology has changed alot since
than. But At least its a guideline.