Masonry Heater Stabilization by TR Engineering - Supplemental to report dated 7/20/98
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Dear Jerry [Frisch],
I have revised the previous calculations to include the new Uniform Building Code lateral coefficients. I have also modified my previous calculations to include the resisting effect of the structures’ dead load. As you can see in the attached calculation sheet the resistance to overturning is greater that the overturning caused by the lateral force, with a factor of safety (FS) greater than 1.0 in all cases. This satisfies the code requirement for stability. Although stability of the stoves is shown, I would like to suggest that we still use the details shown on drawings M-4 and M-5 with these modifications: (1) use a l/4” flat plate in lieu of the previous channel and (2) use l/4” diameter rods instead of 3/8” diameter. This will provide an extra factor of safety against workmanship and varying unit dead load weights for each stove type.
If you have any questions regarding this information, please feel free to call.
Sincerely,
Arthur T. Rack P.E.
President
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