请问钢构建筑的损耗是在多少左右?有没有正规的文件规定?如果有在哪里可以买到这些资料?谢谢

<span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: Arial; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">可参考《福建省建筑工程预算定额》（</span><span lang="EN-US" style="FONT-SIZE: 9pt; FONT-FAMILY: &quot;Times New Roman&quot;; mso-bidi-font-family: Arial; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA; mso-fareast-font-family: 宋体">2002</span><span style="FONT-SIZE: 9pt; FONT-FAMILY: 宋体; mso-ascii-font-family: ‘Times New Roman‘; mso-hansi-font-family: ‘Times New Roman‘; mso-bidi-font-family: Arial; mso-font-kerning: 1.0pt; mso-ansi-language: EN-US; mso-fareast-language: ZH-CN; mso-bidi-language: AR-SA">版）第四册中的附录二&ldquo;定额材料、半成品、成品损耗率&rdquo;。</span>