Late in 1988, both the American Concrete Institute (ACI) and the American Society of Civil Engineers (ASCE) adopted two new standards for the design and construction of masonry: ACI 530/ASCE 5 Building Code Requirements for Masonry Structures (the Code) and ACI 530.1/ASCE 6 Specifications for Masonry Structures (the Specifications). The new Code requires that engineers and architects show more information on project drawings. The Specifications contain a number of quality control and quality assurance requirements that were previously included in codes and hence not always included in project specifications. SPECIFIED MASONRY STRENGTH In masonry work the specified masonry strength must now be shown on the drawings. Contractors must show that their masonry work for the job complies with this specified compressive strength. A contractor can show compliance in two ways: the unit strength method or the prism test method. In most cases, the unit strength method is easier and more cost-effective. With this method, all the contractor has to do is certify that the mortar conforms to the type mortar specified and submit certification, test data, or other proof showing the net area compressive strength of the masonry units for the project. Where the specifier explicitly requires that the prism test method be used, prisms should be tested in accordance with ASTM E 447 Method B modified. MOVEMENT JOINTS Traditionally, the detailing and layout of movement joints was voluntary and often not clearly handled by project documents, making contractors responsible for their design and location. The new Code makes it clear that the location and design of movement joints is the designer's responsibility. ANCHORS AND TIES The Code also requires designers to lay out and design anchors and ties. Contractors should no longer accept responsibility for determining connector design and location.