Hi
If you are looking for W2027
? Then, this is the place where you can find some sources that provide detailed information.
W2027
日本建築行政会議
その他 遮音（soi） 準防･屋根(dw･dr) 防火設備(eb) 特定防火設備(ea) 準防(qp) 防(pc) 準耐(qf) 耐(fp) 難燃(rm) 準不燃(qm)
http://jcba-net.jp/img/20020626taisyouhyou.xls
I hope the above sources help you with the information related to W2027
. If not, reach through the comment section.