I'm performing analysis of 3D space truss of an existing structure. My current specs are truss spec for diagonal and vertical member. While I let both top and bottom chords as continuous member. I used ACI 360-10 for code check. There is also a carrier truss which are perpendicular to the truss with failed top chords. I defined the unsupported length of bottom chord as the spacing of horizontal strutts. My question is, what members should be released? Is my current released members correct?
