pre-tensioned tendon

25 in the code of GB50010-2002;and the design code of GB50010-2002 should be added the development length content on standard hooks and bundled bar when adding lightweight concrete,which can give reference for the revision of future structural design code.

25,同时建议增列标准弯钩和钢筋束的锚固长度及采用轻质混凝土时钢筋的锚固长度的规定。