TM 9-2320-209-20-3-1 FRAME 5 Soldiers 1. Slide carpenter’s square (1) and move string (2) on line X-X until B and C string is flush with edge of carpenter’s square. String will be at right angle (90°) to wall (3). Soldier C 2. Using chalk, mark point D of line X-X where string (2) is flush with edge of carpenter’s square. Soldiers A, 3. Do steps 1 and 2 again for line A-A and point E. B,and C 4. Using chalk, draw line C-C through points D and E. GO TO FRAME 6 7-99