Prospect Pot Bearings - mageba - #3

The load combinations on pages 6, 8 and 10 conform to the „new design concept" according to Eurocode 1 (EN 1991-2:2003. Actions on structures. Traffic loads on bridges). Should the input loads not conform to the Eurocode, the design proof is to be carried out in accordance with the appropriate standard (DIN, AASHTO, BS, SIA, etc). The constructive details according to EN 1337-5 will not be affected by this.

mageba pot bearings satisfy all requirements of the European bearing standard EN 1337-5/2. This standard places special demands on bearing suppliers, such as:

(1) Requirement of EN 1337: "Provision against contamination of the sliding surface shall be made by suitable devices. Such protection devices shall be easily removable for the purpose of inspection.": mageba satisfies this by providing rubber skirts around the bearing to keep dust out. These skirts are connected by velcro-type fasteners, allowing them to be easily removed without tools for inspections etc.

(2) Requirement of EN 1337: "In order to ensure bearing alignment in accor­dance with EN 1337-11 a reference surface or other suitable device shall be installed on the sliding element. The deviation from parallel of the reference surface with respect to the plane sliding surface shall not exceed 1 %". mageba pot bearings are therefore fitted with two spirit levels per bearing (one each in the x- and y-directions, accuracy of reading 0.6 %o). These permanent spirit levels can be used to check levelness both during bearing installation, and when in service.

mageba bearings according to EN 1337 can additionally be provided with the following components (acc. to German Approval):

• Three-point measuring level for a more accurate levelling of the bearing

• Folding sheet for dust protection of the sliding plate

Movements: The dimension dimensions of

sheets on pages 9 and 11 give the main the bearings. They apply the following

movements :

TE longitudinal: 100 mm total transverse: -TA longitudinal: 100 mm total transverse: 40 mm total Larger longitudinal and transverse movements are also possible. In such cases, the top anchoring and the dimensions of the sliding plate are to be adapted.

Rotations: The standard rotation about any axis is 0,013 radians. For bigger rotations, we adapt the bearings individually.

Friction: Sliding resistance is calculated on the basis of the PTFE-stress with relevant loading as well as horizontal load (see adjacent).

where 0,03 <m£0,08

1L2

5_PTFE+10 5_PTFE = average PTFE-stress

TA-bearing: V_xSd = N_Sd •m TE-bearing: V_xSd = N_Sd «m+ V_y • 0,2

V_xSd: Horizontal friction force N_Sd: Vertical force on bearing V_y: Transverse force on bearing

The design of the bearing may vary slightly, depending on the bearing type. However, mageba pot bearings are made exclusively from high-quality materials.

Upper shear bolt- optional Top anchor plate- optional Sliding plate (S355 J2G3) Stainless steel sliding plate (X5CrNiMo 17 12 2) Sliding partner (PTFE, bordered) Guide bar (S355 J2G3) Sliding elements DUB (PTFE, bronze, lead) Dust seal (silicone rubber) Seal (POM Seal chain) Cover (S355 J2G3) Elastomeric pad (natural rubber)

Pot (S355 J2G3)

Bottom anchor plate - optional Bottom shear bolt - optional