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Help with existing barjoist modifications

Help with existing barjoist modifications

Help with existing barjoist modifications

(OP)
Good afternoon all
I am writing to ask about modifying an existing bar-joist system.  The building in question has bar joist resting on masonry walls. What the owner is thinking about request us to do is replace a section with glass wall system.
This will require us to move the bearing point of the structure back from the masonry wall and on to a beam that is preliminarily 18" farther into the existing bar-joist support members.  I am looking for any suggestions or comments on the course of action that should be followed in redesigning the joist in place and moving the bearing point. I realize that this is a truss and can be modeled as such. I appreciate your time on this issue.

Ewing

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