With the development of modern technology in prestressing, such as high strength strands and new types of anchorage, and improvement on construction workmanship, low PPC beams are being used more and more widely.

• 随着高强钢绞线和新型锚具等现代预应力技术的发展以及施工技术水平的提高 ,低高度PPC梁的应用日益广泛。