I can't agree with snoosnoo69, .. anyway, why shouldn't rifle-jumping be allowed ?!? ;-)
The ruined character of the map has been done with a lot of care and I really dig those redish-brick stairs! But the rest of the geometry also has a lot of places I was happy to take a second and third look at .. glad there was no fight raging on around me at the time, hehe. Nice combination of inside/outside and respective choice of textures and mapmodels!
The gripe I have - but it should really be pending a test-play - is that I felt there were too few ammoboxes and considerably too many grenades. I mean "entstats" gives (pertinent only):
2 pistol
7 ammobox
6 grenades
6 health
1 armour
1 akimbo
With most of the ammoboxes and health actually rather "hard to reach" .. the armour too - I think this map will probably be a nade-fest - maybe that's what you want, but it's definitely tricky - this really needs a test-play to pass final judgement!
Overall: great work!
Oh - please rename your files to lowercase for maximum cross-platform goodness!