Deflection is a critical consideration in structural design because it is an indication of the extent to which a structure may deform or bend under load. If allowed to distort excessively, a structure can become unstable, or even collapse. Therefore, controlling deflection is essential to ensure the safety and functionality of a structure. A structure's ability to resist deflection is a function of its stiffness and strength, both of which are design variables that can be adjusted through the sizing and selection of materials, and the selection of appropriate structural systems and members. Deflection limits are typically established by building codes or industry standards, and designers use these limits as a basis for selecting appropriate members and materials. By managing deflection, designers can ensure that their structures are safe, reliable, and durable.
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