I have to say that the "forest" of supports whether temporary or intended to be permanent really doesn’t load the area of infill any more than any properly in-filled area. These T or L shaped houses often have one roof laying over the top of the other roof and the lapping area is merely in-filled and the adjacent roof carries the load of the in-filled area. You could argue that the forest of posts helps spread the load but I really don’t see how it creates any structural concern. That said the adjacent roof trusses have to have been designed for the adjacent roof overlay----and you will rarely see any design change in the adjacent roof trusses to compensate for a "typical" overlay

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Charles Buell