Bridge Construction Materials

Pot Bearings

Description:-

Pot Bearings are critical structural components used to support and facilitate movement in bridges and various other structures. They play a crucial role in distributing loads, accommodating thermal expansion, and reducing the impact of dynamic forces, allowing structures to remain stable and safe.

The design, manufacture, and testing of Pot Bearings must adhere to stringent codes and standards as directed by the consulting engineer and relevant authorities. These bearings are an essential part of many infrastructure projects and ensure the longevity and functionality of the structures they support.

Pot Bearings are designed to provide full and even contact with the bearing area. This precise placement is achieved by checking the level and alignment using spirit levels in all directions. To meet these requirements, epoxy mortar pads with a maximum thickness of 5 mm are often used between the bearing and the structure.

It is essential to ensure that the bottom of the structure's girders resting on top of the Pot Bearings is flat, and special care must be taken to prevent any displacement of the top plate of the bearing during the placement of the girders.

Materials:-

Pot Bearings typically consist of a metal piston supported by a disc or an unreinforced elastomer confined within a metal cylinder. These components are complemented by sealing rings and dust seals to protect the interior elements from external contaminants.

The sliding surface of Pot Bearings is often made of PTFE (Polytetrafluoroethylene), which smoothly interacts with a stainless steel mating surface. This combination ensures minimal friction and wear, as well as longevity in the bearing's functionality.

The complete assembly of Pot Bearings is manufactured using materials that comply with various international standards, including IS 2062, IS 1030, IS 6911, BS 3784, IS 3400, IS 226, and BS 5400. These standards ensure the structural integrity, durability, and performance of Pot Bearings in diverse applications.

The selection of materials and the precise manufacturing process are crucial in producing Pot Bearings that meet the stringent requirements of supporting heavy loads and providing the necessary movement and flexibility in infrastructure projects.