I HAVE BEEN LOOKING FOR GLASS FOR MY PLYWOOD TANK PROJECT AND I FOUND 6 OR 7 PIECES, EACH ABOUT 4 TO 5 FEET, 18 INCHES HIGH, BUT ONLY 3/16 THICK. I DON'T KNOW IF IT'S TEMPERED; THE EDGES ARE BEVELED AND HAVE A GREENISH TINT. ANYWAYS, IS THE GLASS ADEQUATE TO USE AS A FRONT WINDOW WITH SOME BRACING? PERHAPS SANDWICHING 2 SHEETS? THANKS FOR ANY INPUT.