In reinforced masonry, grout enables steel and masonry to work in harmony to resist wind and seismic forces. Several steps--from careful material selection to grout reconsolidation--must be followed, however, to ensure the optimal performance of reinforced masonry. The type and quality of masonry units and grout used on a reinforced masonry job impact productivity, the amount of steel needed for reinforcement, and the ability of the grout to completely encase the steel and bond with the units. Where available, double or single open-end ,H- or A-shaped concrete masonry may be used. Masons can easily lay these units around rebar already in place. Grout must be fluid enough to flow around reinforcing steel and fill cells and cavities without leaving voids. Although it is easy to meet minimum standards for grout, obtaining the best mix design for a job is tricky. Some contractors favor low-lift grouting because cleanouts are not required. High-lift grouting requirements must be satisfied when grout pours exceed 5 feet.