Kneel for symbols in architectural engineering papers

1 board B2 roof board WB3 hollow board KB4 trough board CB5 folded board ZB6 dense rib board MB7 stair board TB8 cover board or ditch cover plate GB9 flashing board or cornice board YB 10 crane safety walkway board DB10/wallboard QB 12 gutter board TGB 13 beam. 438+06 monorail crane DDL 17 track connection DGL 18 car stop CD 19 ring beam QL20 lintel GL2 1 connection beam LL22 foundation beam JL23 stair beam TL24 frame beam KL25 frame beam KZL26 roof frame beam WKL27 purlin LT28 roof truss WJ29. J33 supports ZJ34 column Z35 frame column KZ36 constructional column GZ37 bearing platform CT38 equipment foundation SJ39 pile ZH40 retaining wall DQ4 1 gutter DG42 inter-column support DC43 vertical support ZC44 horizontal support SC45 ladder T46 awning YP47 balcony YT48 beam pad LD49 embedded parts M50 skylight end wall TD5 1 steel mesh W52 steel skeleton G53 foundation J54 hidden column