I am in the middle of designing exposed Glulam trusses. These trusses are parallel chord flat trusses about 7'-6" in depth, and are top chord bearing. The bottom chord is entirely in tension, and I am trying to determine if and how to brace the bottom chord. The trusses will span 66' and the bottom chord is about 55' feet long, and the truss overall looks very similar to a steel bar joist, at least in shape. The 1997 NDS (ASD) Appendix A (A.10 part B) says 'Also bottom chord lateral bracing should be installed in the same bays as the vertical sway bracing, where practical (I hate that phrase), and should extend from side wall to side wall.' I cannot picture what this sentence is telling me to do, this bracing is different than the struts between bottom chords which should extend from 'end wall to end wall' which I can picture. Can anyone explain this sentence to me, and can anyone provide any experience in the bracing situation I have as a whole?
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