What does an arch mean? "A frame" in "an arch frame" is pronounced as "p ǐ n" and is a quantifier, usually referring to a frame composed of arches and supporting structures, used to describe the structural framework of a house or building.

　　In construction engineering, arches are a common structural form that consists of arches and columns or walls that support the arches. Arches can be used in structures such as bridges, tunnels, and roofs to withstand large loads and provide stable support.

　　The specific shape and size of an arch may vary depending on design requirements and usage scenarios. It can be a simple arched structure or a complex framework composed of multiple arches and supports. During the construction process, it is necessary to accurately manufacture and install the arch according to the design drawings and construction process requirements to ensure the stability and safety of its structure.

　　What is the length of an arch frame in meters?

　　The length of an arch varies depending on its specific purpose and design requirements, usually ranging from a few meters to several tens of meters. For example, the single prefabricated arch of the 1 # aqueduct of the Taisu Canal in the Hualiangting Irrigation District is about 16 meters long, the wooden arch of the cloud dome has a span of 45-120 meters, and the arch of the GTC roof structure has a span of 45-120 meters.