sebas-1024
Structural
- Oct 7, 2020
- 14
Hello,
I'm currently designing the foundation for a manufactured house with an 18" crawl space. The client gave us some typical drawings of their past projects and they use a perimeter wall that covers the crawl space basically. For me it seems like a pretty good choice for this type of house specially given the simplicity of it. I am unsure as to how these type of foundations are designed though, I don't really expect any extraordinary bending moments, and given the fact that it's a closed rectangle it should be stiff enough so that I don't have to worry about overturning, but nevertheless, I would like to put these thoughts into numbers. So what I did was creating a STAAD.Pro model in which I simulate the walls of the foundation with plate elements (Wall thickness of 1 ft), apply the corresponding loads, and check bending moments for the reinforcement (Minimum reinforcement in every case) and displacement (0.001 in for worst case). I'm not taking into account any springs for the soil interaction which I feel makes the design more conservative in any case. Am I missing any important considerations for this design, are there any books that might go into a little depth for it, is it a good enough approach for this type of foundation, or on the other hand, could this be something that is sort of standardized within a certain code? The Project is for California by the way and I'm attaching a snip of the STAAD.Pro model so you can visualize the design.
Thanks in advance for any help.
I'm currently designing the foundation for a manufactured house with an 18" crawl space. The client gave us some typical drawings of their past projects and they use a perimeter wall that covers the crawl space basically. For me it seems like a pretty good choice for this type of house specially given the simplicity of it. I am unsure as to how these type of foundations are designed though, I don't really expect any extraordinary bending moments, and given the fact that it's a closed rectangle it should be stiff enough so that I don't have to worry about overturning, but nevertheless, I would like to put these thoughts into numbers. So what I did was creating a STAAD.Pro model in which I simulate the walls of the foundation with plate elements (Wall thickness of 1 ft), apply the corresponding loads, and check bending moments for the reinforcement (Minimum reinforcement in every case) and displacement (0.001 in for worst case). I'm not taking into account any springs for the soil interaction which I feel makes the design more conservative in any case. Am I missing any important considerations for this design, are there any books that might go into a little depth for it, is it a good enough approach for this type of foundation, or on the other hand, could this be something that is sort of standardized within a certain code? The Project is for California by the way and I'm attaching a snip of the STAAD.Pro model so you can visualize the design.
Thanks in advance for any help.