Masonry Magazine June 1992 Page. 19
MASONRY—MAY/JUNE, 1992 19
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**THEORY AND PRACTICE**
The following is excerpted from a presentation by Dr. Clayford T. Grimm, P.E., FACI, FCSI, Consulting Architectural Engineer, Austin, Texas, at the CSI Convention in Atlanta, Georgia, June 29, 1991.
**INTRODUCTION**
The subject of this presentation is the relationship between theory and practice in masonry. Theory is a body of knowledge, and practice is the application of that knowledge. Theory is what we know, and practice is what we do. If what we know is not what we do, we have a problem.
**THEORY**
Theory is a body of knowledge. It is a set of principles on which the practice of an activity is based. Theory is a plausible or scientifically acceptable general principle or body of principles offered to explain phenomena. Theory is a belief, policy, or procedure proposed or followed as the basis of action.
**PRACTICE**
Practice is the doing, execution, or performance of an action. It is the exercise of a profession. It is repeated performance or systematic exercise for the purpose of acquiring skill or proficiency. It is the application of knowledge as distinguished from its acquisition.
**THEORY AND PRACTICE**
Theory and practice are interdependent. Theory without practice is sterile, and practice without theory is dangerous. Theory is the foundation of practice, and practice is the test of theory.
**MASONRY**
Masonry is the art and science of building with modular units of burned clay, concrete, or stone. It is one of the oldest and most durable forms of construction. Masonry is a complex subject, and it requires a thorough understanding of both theory and practice.
**THEORY OF MASONRY**
The theory of masonry includes the following:
* The properties of masonry materials
* The behavior of masonry under load
* The design of masonry structures
* The construction of masonry structures
* The maintenance of masonry structures
**PRACTICE OF MASONRY**
The practice of masonry includes the following:
* The selection of masonry materials
* The mixing of mortar
* The laying of masonry units
* The construction of masonry walls
* The construction of masonry arches
* The construction of masonry vaults
* The construction of masonry pavements
* The maintenance of masonry structures
**THEORY AND PRACTICE IN MASONRY**
Theory and practice are both essential for successful masonry construction. A mason who understands the theory of masonry will be able to select the appropriate materials, design the structure properly, and construct it in a way that will ensure its durability. A mason who has experience in the practice of masonry will be able to lay the units properly, mix the mortar correctly, and construct the structure efficiently.
**CONCLUSION**
Theory and practice are both essential for successful masonry construction. Masons must have a thorough understanding of both theory and practice in order to build durable and safe structures.