在进行桥梁后张法预应力施工时，需对钢绞线理论伸长量进行计算，以便在施工中与实际伸长量对比，复核混凝土中钢绞线是否正常拉伸。本工具可在CAD中画好钢绞线形状，选取后输入张拉参数，可在excel中生成结果报表。方便施工计算，特别是有不规则梁体时。-After conducting tensioned prestressed bridge construction, the need for theoretical strand elongation is calculated to compare with the actual elongation in the construction, review concrete strand is normal stretching. This tool can be painted in CAD Strand good shape, the input parameter selection after tension, can produce results in a report in excel. Construction convenient computing, especially when there is an irregular beam.