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(arm) is one of three types of component in the bracket set; the others
are the dou (blocks) and the ang. There are five types of
gong:- hua gong .
Any transverse gong. Its length varies according to its position
in the bracket set. It makes the cantilevered eaves possible.
- nidao gong . The lowest longitudinal gong in the bracket set. It sits on the lu dou.
- guazi gong. A longitudinal gong at the end of the hua gong or the ang but below the ling gong.
- ling gong. The highest longitudinal gong in the bracket set. It sits at the end of the hua gong or the ang and supports the eaves purlin.
- man gong. Any other gong.
For illustrations, see Liang (1984, 241).