CEIFCATIONS OR OF MY VARIATIONS NEEDED 1N ORDER TO FOR: a. Cc AT 28 DAYS • 50:0 PSI. CONFORM TO CODES, RULES NO REGULATIONS. UPON RECEIPT OF SUCH a. PREPARATION MO FORMING Cr WALL PRISMS. F. LUMBER: INFORMATION, THE ENGINEER WILL SEND WRITTEN INSTRUCTIONS TO b. SAMPLING MD PLACING OF MASONRY UNITS. ALL CONCE