POT Bearings

Pot Bearings

INTRODUCTION

pOT Bearings

ATAYA’s Pot Bearings: Engineered for high endurance and large movements

Long spans require high strength bearings that accomodate large displacements and can withstand very high compressive loads .

These versatile bearings come in various configurations that comply with the EN 1337-5 standard. This ensures you get the perfect solution for your bridge’s specific needs, whether it requires handling horizontal translation, accommodating rotation, or both.

Type of POT BEARINGS

FIXED POT BEARING

This type of bearings restricts horizontal loads in longitudinal and transverse directions, therefore, does not allow any movement and consists of POT, piston assembly including an elastomeric pad which is encapsulated and fitted with
an anti-extrusion sealing ring under vertical load this encapsulated elastomeric
behaves like a viscous fluid, allowing rotations around the horizontal axis.

Pot guided ex - Copy-0explode.effectsResult

GUIDED POT BEARING

This type of bearings allows movement in one direction
between stainless steel and lubricated PTFE which
is placed on the piston and restricts horizontal loads
perpendicular to the direction of movement by a guide
bar placed in the center of the piston

FREE SLIDING POT BEARING

This type of bearings allows movements in both longitudinal and transverse directions between stainless steel and lubricated PTFE which is placed on the Piston, therefore, does not restrict horizontal loads except for nominal friction.

Bearings Components

PISTON

Closes the open end of the recess in the pot and bears on the elastomeric pad and transferers the vertical and horizontal load from the super structure to the remaining parts of the bearings

ELASTOMERIC PAD

transfers the vertical load from the piston to the pot and allows the bearing to rotate.

EXTERNAL SEAL

Prevents moisture and debris from entering the gap between the piston and the pot.

POT

Contains the elastomer, piston, internal seal and transfer vertical and horizontal loads to substructure and bolts, respectively

INTERNAL SEAL

component which prevents escape of the elastomer material through the clearance between the recess walls and the piston when a compressive force is applied

ANCHORS & BOLT

Resist horizontal loads

mATERIAL SPECIFICATIONS

POT AND PISTON

The pot and piston shall be manufactured from ferrous materials according to EN 10025.

INTERNAL SEAL (BRASS SEAL)

Internal seals made from materials in annex A are in the scope of this standard En1337-5

1- Brass :

The material used for the brass seal shall be grade
CuZn37 or CuZn39Pb3, as specified in EN 12163
and EN 12164 respectively.

2- POM seal :

The material used for the moulded seals shall be
polyoxymethylene (POM) and shall have the
properties shown in Table A.2.

3- Carbon filled PTFE seal :

The material composition shall
consist of PTFE + 25 % carbon.
The material properties shall be in accordance with the
requirements of Table A.3 .

4-Stainless steel seal :

The material used for the stainless steel
seal shall be as specified in EN 10088-2, 1.4401 or 1.4311

ELASTOMETRIC PAD

The elastomer material used for the elastomeric pad shall be natural or polychloroprene rubber in accordance with ISO 6446.

AUSTENITIC STEEL SHEETS

The austenitic steel used for sliding surfaces according to

EN 10088-2 1.4401 +2B with
minimum thickness of 1.5mm
The roughness is Ry5i < 1 μm according to EN ISO 4287.
The hardness ranges from (150HV1-220HV1) according to

EN ISO 6507-2.

SLIDING PLATE (PTFE)

The PTFE sheets shall be Pure polytetrafluorethylene free sintered without regenerated or filler materia.

LUBRICANT (SILICONE GRESE)

The lubricant shall not be harmful to the elastomer or other
components and shall not cause excessive swelling of the elastomer.