With the presentation of its new design standard and standard specification to the ACI Convention, ASCE/ACI Committee 530 began the last stage in a standardization procedure that will result in a new way to design and build masonry walls. The new design standard is referred to as the "Code" and the standard specification is referred to as the "Specification." Both depart from existing standards in many significant ways. MATERIALS The Code presents rules for the rational design of clay brick masonry, concrete masonry and multiwythe masonry made with brick or block. In addition, the Code requires the designer to give more consideration to volume change and differential movements. Thus it includes several coefficients for volume changes, such as moisture expansion of clay brick, drying shrinkage of concrete masonry, creep, and elastic shortening. SPECIFICATION When the new Code is adopted, buildings will be required to be designed according to the Code and constructed according to the Specification. Hence, all construction related items have been removed from the Code and incorporated in the Specification. INSPECTION The new Code assumes that all masonry work is inspected. Therefore, it uses only one set of allowable stresses instead of the two sets of values used in the past (for inspected work and noninspected work). EMPIRICAL DESIGN Under the new Code, empirical design cannot be used in: seismic zones 3 and 4; areas where the basic wind load is over 25 psf; buildings higher than 35 feet where lateral load resistance is derived from masonry shear walls; and buildings that do not have a minimum number of shear walls.