The width of reinforced concrete ring beam should be the same as the wall thickness. When the wall thickness h≥240mm, its width should not be less than 2h/3. The height of ring beam should not be less than 120mm.

When the number of floors exceeds 5, when the cast-in-place reinforced concrete ring beam is set according to the relevant standards, the beam slab and ring beam should be poured together. When the floor slab without ring beam is buried in the wall, its length should not be less than 120mm, and its thickness should be determined according to the adopted block modulus, and at least two longitudinal steel bars with a diameter of 10mm should be set along the wall length.

Extended data:

Ring beam is a kind of closed beam component which is set on the cornice, window top elevation, floor slab, crane beam elevation or foundation top surface along the horizontal direction of masonry wall. The ring beam is generally set outside the foundation wall, at the cornice and at the floor. Ring beams are often not set together in buildings, and their number should depend on the height, number of floors, foundation conditions and seismic requirements of buildings.

Single-storey buildings should have at least one ring beam, and multi-storey buildings should have at least one ring beam. In earthquake-resistant areas, ring beams should be set up layer by layer. In addition to the external wall and the load-bearing internal longitudinal wall, according to the building structure and seismic requirements, the transverse wall should be provided with ring beams every 16m ~ 23m, which can give full play to the belt function of ring beams.

Reference source: Baidu Encyclopedia-Ring Beam