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[SEAOC] Increase Roof Weight

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     I did not check the existing lateral system. This does not seem
     feasible since the wind load would not have changed in the age
of the
     building. The lateral load to the building was governed by the
wind
     load not the material weight. The same wind load was in effect
at the
     time the building was constructed as it is today therefore no
changes
     in the lateral load to the building has taken place.
     Dennis

     Dennis,

     Although the lateral load may be the same, since your dead load
has
     increased you could be overstressing (compression/buckling) the
end
     columns in your shear walls when you combine dead load and
overturning
     loads from wind.  Obviously this will depend on your roof
framing
     plan, shear wall openings, and the percent increase your new
roof load
     is distributed to your boundary elements.

     Thomas Hunt

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