Thanks for the suggestions.

What I wound up doing was copying the component out from the model, exploding it, sub-dividing it into phases, and making each phase a unique component with the same basic name as the full deck. So I would up with components:
Deck L1
Deck L1.1
Deck L1.2
Deck L1.3

This way I could also turn on the un-seamed deck at the end to remove the visible joints easily.

I have a parking garage deck all as one component. As it turns out, we're now going to break the deck into two phases, so I need to split the deck in half and make Phase 1 a component, and Phase II a component. How do I do that?

Thanks. That worked, and I do have the hardware to support it.

Follow up:
If I have an image like this in my model and someone with a lesser computer tries to open it, what will happen?

I converted a pdf floorplan to jpg to import it for tracing (I also converted it to tiff with the same result) and when I bring the jpg into sketchup I lose a significant amount of resolution vs. viewing the jpg in the windows picture viewer. This becomes most evident when looking at the dimensions on the images. They are clearly legible in the picture viewer, and totally unreadable in sketchup.

Any ideas on how I can improve the resolution of the imported image?