euro bracing

I purchased a used 100g tank that needs resealed which shouldn't be a big deal. It has euro bracing on the top and some sort of extra glass border around the inside of the bottom,that I think is just there to protect the corners down there. Since I don't know what it is called it's hard to...

I just had a custom 375gal (96" x 30" x 30") tank built and delivered for a new Reef aquarium. The tank was made locally by Tropical Aquarium Mfg in Miami (tropical-aquariummfg.com). The tank quality is excellent. No complaints there. But I specifically asked for powder coated aluminum...