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Posted by DanG on August 5, 2006, 6:53 am
Try working with the city man. Either distribute the load as Rico
says with a header or find the point load involved and the bearing
capacity of the soil in question to figure out the footprint
required to carry the load. Leave the existing footing as is and
dig the bearing pads under the footing at the point loads.
If this is a garage, I don't see how you can create center bearing
unless you have 2 garage doors with bearing in the center assuming
the doors are on the gable end.
______________________________
Keep the whole world singing . . . .
DanG (remove the sevens)
dgriff237@7cox.net
>I provided a truss company the basics of my present garage, so
>that
> they could design a new roof for it. I told them I have 18"D by
> 15"W
> perimeter foundation, which is suitable for support of two story
> house
> in my county. I also told them that I have 16" OC 2x4 stud
> walls with
> double top plate, also capable of supporting a second story by
> code.
> Some of this information was provided in drawings and other by
> e-mail.
> The computer techie designer spent a lot of time with me on a
> truss
> system, I put half down and got engineered stamped calculations.
> When
> I managed to have a presubmisson review by the senior architect
> at the
> planning department, he told me that the point load for two
> multiply
> trusses, which support the ladder of joists supporting dormers
> and a
> deck, exceed the point load capability of the foundation. Can
> anybody
> tell me how to calculate what point load my foundation can take?
> Also,
> need help considering possibilities, other than the big hassle
> of
> jackhammering, digging, and pouring more concrete and rebar into
> an
> otherwise good foundation. I want the dormers and the patio
> deck. Can
> I spread the load from these trusses to adjacent trusses for
> example?
> Ideas wanted before I deal with the truss company again.
>
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