The fix for this deficiency is relatively straight forward. The bottom chord fix is the most critical and should be corrected first. Cutting the bottom chord turns the entire truss frame into what i call "fire wood". No structural strength exits in the truss frame if the tension chord is cut...
No problem using a steel header as long as its properly designed. I prefer using 2 angle irons back to back cause
it just looks more stable.
Another option, which may be easier for you is to flush the header on top of the window inside the floor system.
The header would sit continuously over...
RFReund is the hatched area in (2) and (3) your moment diagram? Doesnt look correct, there should be a stress reversal at each joint location, where the moment will be negative.
If you give me the span and pitch i can run the model in one of the truss programs i have available, and check what...
Pardon the crudeness of my drawing, but i sketched out the calcs i was trying to describe above.. Hope it helps.
_________________
Chttp://files.engineering.com/getfile.aspx?folder=d8a5304f-95fe-48c8-9c96-d0ab17b62f67&file=trs.jpg
The horizontal reaction at the pin end of your truss model should be equal to the horizontal projection of the loads acting normal to the surface of the truss.
Lets say you resolve the horizontal component as x=6plf*sin(22.6) =2.308 PLF. This load is acting along the surface of the top chord...
In my opinion modeling top chord panels as being pinned on both their ends will yield a workable solution.
However the model you're creating mathematically does not match the behavior of the structural element in real life.
If i had a choice id model the chord continuous over panel points with...
