What does it mean that the eaves of ancient buildings in China bend upward?

1, the cornice is long, and it needs to be supported by large wooden members, not ordinary rafters, so it is padded with two layers, which causes the others to tilt up.

2. For aesthetic reasons, it rises like the wings of a bird, making the roof look not only light, but also light and ready to fly.

3, the eaves are very long, and the edges can be tilted up for better lighting, otherwise the light will be covered.

4. Tilt the edge a little, so that the rain can be thrown further and the foundation will not get wet.

Extended data:

With its unique plastic arts and structural features, ancient architecture in China has formed its own national architecture system and become the main body of the oriental architectural culture circle. The wing angle of traditional architecture is a major feature of the beauty of traditional architecture in China, which is mainly used at the corner of the four-slope spire building to make this kind of architecture more perfect, thus enriching and comparing the perfection of traditional architectural art in China.

As early as the pre-Qin period, there was a record about the wing angle of ancient buildings in Zhou Dynasty in the Book of Songs, which was a special art created by the working people in China through repeated practice in the long-term construction process.

Wing angle, first of all, is composed of old corner beam, young corner beam, corner eaves rafter, corner flying rafter, corner bucket arch and some related auxiliary parts. Viewed from the outside of the building, the two corners gradually tilt and protrude forward, forming a gentle curve. Judging from the data of stone reliefs, funerary wares and tombs, the Han Dynasty has taken shape. During this period, there was no corner beam at the corner of the building, so it was called cornice.

By the Northern and Southern Dynasties, the cornices had been raised, forming the wing angle of the corner. During the Tang and Song Dynasties, the practice of wing angle developed to a mature stage. The book "Architectural Style" edited by Li Mingzhong in the Song Dynasty clearly stipulated the method of wing angle, which was widely used in the Jin, Yuan, Ming and Qing Dynasties and had different methods.

Mainly used between two adjacent cornices on the roof. Many ancient houses in China have far eaves, which are described in the Book of Songs and developed in the Tang, Song, Ming and Qing Dynasties. The most common wing angle practice is the official practice of the Qing Dynasty in the north, and it is mainly spread in Jiangsu and Zhejiang provinces in the south.

In Qing Dynasty, the wing angle of official buildings generally rose by four diameters from the right rafter epithelium to the last rafter epithelium, and the right rafter grew by projecting from the outer end of the corner beam, which was called "rushing three times and warping four times" by craftsmen.

The eaves of ancient buildings in China bend upward, and most buildings resting on mountains or temples are eaves. First of all, we should improve the strength of corner beams and cornice trusses at an angle of 45 degrees.

Due to the overlapping of the gable and horizontal cornice trusses, their respective diameter strength has been reduced to about 2/5. If you want to insert the corner beam into the other leg and overlap each other, the overlapping strength will decrease continuously, and finally the weight of tiles, watch bricks and so on on on the cornice can not be effectively supported. Therefore, in order to improve the strength of corner beams and cornice trusses,

The corner beam is directly cut and directly overlapped on the cornice truss on the mountain surface and the horizontal surface; This makes the corner beam must be higher than the cornice truss, so during this period, logs are added to realize the gradual transition from corner beam to cornice truss on the mountain surface and horizontal plane, and it is constantly explored, optimized and beautified in the practice process, and gradually evolved into a beautiful upward curve we see.

It is not the above reasons that the purlins on both sides of Gu Lou in southern Fujian are raised or forged, which leads to the slightly higher sides of the two mountains, and at the same time increases the high hopes of bricks and tiles, forming a unique upward bend.

References:

Wing Angle _ Baidu Encyclopedia?