The rails on the Delta 36-T30 are spec'd at 57.5".

Based on the size and layout of my shop, I don't want/can't have the overall
width of the table saw to be any more than the current 36". The original rails
on the Craftsman saw extend about 27" on the right of the blade and support
the router table that I added. I do not want the Delta rails to extend any
farther than the current rails. I just don't have the room.

Other than obviously voiding the warranty, is there any reason that I can't
shorten the front tube and 2 pieces of angle iron to fit my needs? As far as
I can tell from the manual, the rails just extend into open air, as shown
in Figure 5 on Page 5.

http://www.deltamachineryparts.com/w...531,36-T30.pdf

I would cut the rails so that they are just long enough to support the
current router table.