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paddingtongreen, I do not understand this: "two, four bay trusses, connected by a beam, bridging the central gap, the beam connected to the first two node points on either side of the gap". Can you explain?

I'm in joist and trusses business, so all the joints are pinned. Moment frame program is not needed on a regular basis. BAretired, if I reinforce my chords in this manner, HSS web will have to be welded to those reinforcing members. Also, adding two angles as per my sketch improve moment of...

I don't have frame program. I guess stress-strain analysis can not be used for deflection calcs?

butt weld them

These are new joists, they are not fabricated yet. Nothing is cheap these days, so to increase top chord size throughout is not economical. We have done this kind of joists in the past always reinforcing top and bottom chord over three panels with two angles so it looks like channel. The web...

dhengr, I do not want to distribute any additional moment to the bottom chord of the truss. That is to save on reinforcing bottom chord angles. I would like top chord to take that moment from shear.

Thank you all!

The truss must be designed for unbalanced load, therefore the axial load in the web will never be zero. Although, the closer it is to the centre of the truss, the less load it will have. My main question, I suppose, is this: if the top chord is reinforced to withstand combined axial load and...

Thank you for the input. I don't think the change in the bending stiffness is a problem. So I can assume that all additional moment from shear is taken by the reinforced top chord and bottom chord is only taking axial load? Vierendeel trusses deflect more that warren. The fact that one...

I have to analyze warren truss with one diagonal missing somewhere in the centre of the truss.I understand that top and bottom chords will have additional moments. The required opening in the truss should quite large, so there is no room for reinforcing both top and bottom chord of the truss...