It took me several months and many many glass companies coming out to give quotes to find the right glass company to do my shower. (long story) Just keep getting quotes. I didn't want anyone drilling into my floor so with each person that came out I learned a little more. My shower consists of 3 panels. One of the fixed panels is 1/2" and it runs from floor to ceiling and has 3 clips, 2 in the wall and 1 on the ceiling to hold it solid in place. The door (3/8") swings off of this panel and the other panel 3/8" is fixed with only one small clip at the top and the rest is silicon-ed in. It works terrific and it is beautiful. One thing I learned is nothing is easy and even if you hire someone to do it you practically have to learn the trade.

Is the existing curb pitched slightly into the shower? If not, that would probably be the easiest fix. You could even do a mock up prior to doing any work to make sure that the drips flow into the shower. For glass doors, I highly recommend wood framing behind the hinges so the hinge screw threading finds solid purchase. Glass doors are heavy. You want the top hinge well-secured.

The reason I prefer not to go over 32" without a center stile is that I'm known for loading up my shelves. Only a weightlifter would be able to carry a single row of the art/history books that are crammed tight onto every shelf of all 23+ bookcases we own. My DH worked in a warehouse and regularly hauled around 100-lb boxes, but even he can't carry around more than about half the books on a single shelf comfortably. Now, my kitchen stuff is very good quality but not as heavy as an entire row of my art books. However, it wouldn't take much to get there - my 6-qt cast iron Dutch oven and two 25-lb bags of rice (which a lot of Asians have on hand), and you're getting dangerously close to the 75-lb limit on most kitchen cab shelving. I have five different sets of dinnerware service, and some of them are VERY heavy, to the point where you wouldn't want to carry all 16 dinner plates at one time (unlike bone china, where an average adult could manage 16 plates with no more trouble than it would be to carry 15 lbs. of sugar or flour). If you have any doubts about your shelving in a cab wider han 32", the solution is simple. Weigh what you are going to put into it, and see what the total is. If you are well under the weight rating - your cab maker should be able to tell you what the max load limit is per shelf - then you'll be fine; e.g., you're only putting 50 lbs of kitchen stuff on a shelf rated for 75 lbs.

Lol (I'm reading the comments thus far).. I did learn I have the u channel set up. Thanks John. Back to the org post, I'm no pro but my shower is about 46 inches wide. If you have a 42" opening then can't the installer do a set up similar to mine, but with a door that is a couple inches less in width? The door I have is the widest I could go, per the installer, so I don't see why you couldn't just do a door a couple inches less in width with the same fixed side??? By the way, my installer let me scroll thru pics on his phone of his past work. I saw all sizes with both u channels (aka the strip lol) and clamps.. My glass is 3/8" thick... Half inch cost more of course. I didn't even have him quote me half inch... Let us know what you find out