( IDENTIFICATION OF DEFORMED REINFORCING BARS With the diffetent iypes. grades, and sizes ""i. lable. it is necessary 10 provide sonle means of bar identification. 11tc AS IM spcc:if,c:cuions rc~3t c~f..h llar P~cer roll olll O the r<info~ o) A lotter or symbol to show the Producer's mill, b) A number corrc,oponding to the size numbe, of the bar, c) A &ymbol or nwlcing 10 indicate the type of reinforcing stool, and c J) Gnldc mad, as shown in fig. 7-2, to de$ignare Grades 60, 75, 80, 100 and 120. The grade ma,k for Grade 60 may be eitbor the number "60" [4] or Ont (I) sing. le line. When 1. 1 single lioc is med to designate Orade 60, il is small~ and bctwcc-o th¢ two main nos which are on opposite sides of all USA4nade reinforcing bars. Similarly, the grode maiic for Grade 7S may be either the numbcr''7Snor two (2) grade lines. Grade marks for Grades 80, JOO and 120 are as hown in Fis, 7-2. If grade lin-.--s arc used, they m. USI be continued at 102Sl 5 deformation spaces. No~ marl< is required for Grodes 40 and 50. Bar identificatio n maiks may also be orienlfd to read horizontally (at 90-to cho. !ic illuscrared in Fig. 7-2). 7-4 cone,.. Roinlorefng Stool tn Slilule Section 609 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 6-9