THE TYPES AND DESCRIPTION METHOD OF BRACKET COMPLEX CALLED "DOU KE" IN CHINESE CLASSICAL ARCHITECTURAL BOOK "GONG CHENG ZUO FA ZE LIE"

"YING ZAO FA SHI" (1103 A. D.) and "GONG CHENG ZUO FA ZE LIE"(1734 A. D.) are two important books on Chinese classical architecture. To compare them, this paper makes a study on the types and the description method of bracket complex called "Dou ke" in "GONG CHENG ZUO FA ZE LIE". "YING ZAO FA SHI" gives general rules and kiwari for design and computation of bracket complex called "Pu zuo", "GONG CHENG ZUO FA ZE LIE" describes eleven types of "Dou ke" and carefully specifies the "kiwari" of each type, the sequence of assembling it and its calculated actual dimensions according to the eleven grades of "Dou kou". It can be clear that utilitarian nature is an outstanding characteristic of "Dou ke" in "GONG CHENG ZUO FA ZE LIE".