What are the minimum CBC requirements for footing dimensions for a 2 storey residence? Are they different to UBC requirements?
Discussion Forum
Discussion Forum
Up Next
Video Shorts
Featured Story
Skim-coating with joint compound covers texture, renews old drywall and plaster, and leaves smooth surfaces ready to paint.
Featured Video
Highlights
"I have learned so much thanks to the searchable articles on the FHB website. I can confidently say that I expect to be a life-long subscriber." - M.K.
Replies
If you pulled a permit for this job, then why not just ask the bldg insp.? and get first hand info.
normally, 14" wide strip footings were required for 2 stories, but times do change. Get it right
There is a good example of how local footing requirements differ. We would need 20" to 24" wide footings here for two stories, 8" deep, with two #4 rebarchaired halfwayt and laddered every four feet.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
>>with two #4 rebarchaired halfwayDo you mean 1/2 way up? As in:-----------------------------
- - - - - - - - - - - - - - - rebar here
------------------------------Wouldn't that add a minimum of strength to the footing?
View Image
Sojourners: Christians for Justice and Peace
That's right, and it is minnimal strangth wise, but we have a lot of variation in our base materials, sometimes crossing ledge or a couple soil veins. So the flex imparted can be up or down both onthe same length of wall. The greater concern is to hold it together.
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
Sometimes things slip past the building officials without being picked up. This was an over the counter deal, submitted by the (incompetent) architect and it will come back to whoever builds it if it isn't up to minimum requirements. Yes I could call the building dept and ask but I thought the forum would give me a starting point.
Dimensions are only one of many variables in the design of foundations. There is soil type and it's load bearing capacity to be considered first. Then the footings vary in how to adress that need, spreading loads evenly over the soil.
Footings can vary by PSI of the crete used, the dimensions, and the amt and placement of rebar within them. As mentioned already, your local building dept should have the easy answer for the soils in your area.
Welcome to the
Taunton University of Knowledge FHB Campus at Breaktime.
where ...
Excellence is its own reward!
I know that there are many considerations such as the ones you mentioned but I was specifically interested in the minimum requirements as I am working with a structural engineer who doesn't have a clue and seems to think it is ok to build what I would consider less than even the code allows even before anything else is considered.
Hard to believe the engineer is that incompetant, but the point of my responce is that the answer CANNOT be giiven here without knowing the load bearing capacity of your soils. The dimension is just an intermediate translation between bearing available and load applied
Welcome to the Taunton University of Knowledge FHB Campus at Breaktime. where ... Excellence is its own reward!
OK - I give... what's CBC - Croatian Building Council? ;-)
Our requirements are similar to piffins but no rebar - this is assuming a soil bearing capisity of 2000 PSF but other factors enter into play like foundation wall width. I live on a different planet from you guys though...