The 2011 edition of Building Code Requirements and Specification for Masonry Structures covers the design and construction of masonry structures. As a Standard, it is written in such form that it may be adopted by reference in a legally adopted building code. Changes to this edition include a recalibration of allowable stresses, the addition of provisions for infill masonry, and a refinement of the quality assurance/special inspection provisions for masonry that includes references to relevant requirements for each inspection task. Topics include: definitions, contract documents, quality assurance, materials, placement of embedded items, analysis and design, strength and serviceability, flexural and axial loads, shear, details and development of reinforcement, walls, columns, pilasters, beams and lintels, seismic design requirements, glass unit masonry, and veneers. An empirical design method applicable to buildings meeting specific location and construction criteria are also included. This Standard is an essential reference for structural engineers, contractors, and inspection officials working on masonry structures.