Recent content by TTJT

To perhaps clarify the geometry. The cantilever width is 14' and there is at least one bay on each side of the two way backspan so that all the edges are continuous.

The way I thought of it is that a two way backspan is "stiffer" than a one way span and would deflect less. The lesser the backspan deflects, the small the rotation about the support and thus less deflection at the tip. I'm thinking though that the cantilever will deflect more than if it was an...

Thanks Hokie, Is there a design procedure to account for this if these calculations are being done by hand?

Thanks Mike, Since the backspan on the slab is a two way slab, I thought it would help with the rotation around the support and reduce the overall deflection. Analyzing the 17' backspan as a one way spanning member seemed conservative.

Dear All, I have a 6'-6" cantilever slab that is supporting a 12 foot tall masonry wall at the end of the cantilever. Strength is not a problem but I'm concerned about the deflections particularly long term. The backspan of the cantilever slab is a 17'x17' two way slab supported on beams and...

Thanks BA I think I understand the analysis now. If I need 10 feet (lenght) of wall weight then the foundation must span 20 feet as a simply supported beam with tension at the base of the foundation wall (max. at midspan). Almost like there is no soil under this virtual span. At one end of the...

Thanks BA 1. For point 1. What would you consider "stiff enough". I was simply going to keep my deflections to L/240 (2L/480) where L is the cantilevered length. For point 2, I don't understand your comment about the foundation spanning 50'. When checking the capacity of N-S foundations to act...

Hi All, I have mostly done small residential/commercial projects and have been grandually moving up to more complex structures. I am currenlty designing a three storey motel which will be primarily framed using load bearing masonry walls and cast insitu floors. The size of the structure is...