1, the quantity is different. The structural beams connected by single-sided arc bearing joints are single-ended beams, while the beams connected by double-sided arc bearing joints are generally two. One-sided arc bearing joint transforms an edge bearing into an arc bearing, thus introducing the reaction force of the lateral bearing to reduce the deformation of the plate. On the other hand, the double-sided arc pressure-bearing joint is designed with supports on both sides, so that the joint can be stressed in both directions and the stress area of the joint can be increased.

2. Different connection methods. The connection mode of single-sided arc pressure-bearing joint is to bury the beam end into the groove of the bearing, and reduce the deformation of the plate through the reaction force of the lateral bearing. On the other hand, the double-sided arc pressure-bearing joint increases the area of the joint by connecting double supports at both ends of the beam, thus improving the bearing capacity of the joint.