t 16 (400 mm) O. C., thus forming a ladder configuration. Overall measurement (side-to-side rod) is approximately 2 (50 mm) less than the nominal wall thickness.
Another advantage of ladder-shaped wire is evident when grout is placed and consolidated. The absence of diagonal (truss) cross-wires improves the flow and consolidation of grout. Under Articles 3.43 B.4.d, the MSJC Code typically requires CMU block (i.e. hollow units) to be placed so vertical cells to be grouted are aligned.
Placement