The analysis and repaired actions of cracks in continue crossed and thickly dotted rib beams of RC roof due to temperature variation

Continue crossed and thickly dotted rib beams of RC roof is widely applied in civil engineering structures. They are superstatic structure in crossed and longitudinal directions. It is easy to be cracked because of low steel ratio and little dimensions. Both the cause of cracks and how to repair cracks are discussed in detail in this article.