【Daily Question】Utilities - Civil Engineering - 20190926
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Large buildings often require expansion joints; the correct description of expansion joints is (). A. Set settlement joints at points where there are significant variations in the height of the building, as well as in its foundation and base. B. Set settlement joints where the building is very long, and where temperature changes and concrete shrinkage stresses cause cracks to appear in the building’s components. C. Set settlement joints where the building’s shape is complex or where there is a large difference in stiffness between various parts of the building. D. Set settlement joints where there are long protruding sections in the building’s floor plan, where there are different floor levels, and where there are significant differences in floor heights. Answer: A
B. Since the building is long, settlement joints are provided at the points where temperature and concrete shrinkage stresses cause cracks in the building’s components
C. In cases where the building’s shape is complex or there is a significant difference in stiffness between various parts of the building, settlement joints should be provided