Aesthetic criteria may play a primary role in unit selection for reinforced composite walls. Designing the composite wall to match modular dimensions may make the detailing of interfaces much easier. Window and door frames, foundations, connectors, and other accessories may coordinate better if typical masonry wall thicknesses are maintained.
Additional criteria that influence the selection of units for reinforced composite walls include:
1. Size and number of reinforcing bars to be used and the cell space required to accommodate them.
2. Cover requirements may come into play when reinforcement is placed in the cells off-center. Cover requirements could affect the unit selection, based on the desired bar placement; face shell thickness, and cell dimensions.
3. If double curtains of vertical reinforcement are used, it is preferable to use units of the same thickness to produce a symmetrical cross-section.