[Seismic] ball bearing hinge safety management to implement the national labor protection policy, strictly enforce safety rules and regulations of civilization construction management of construction enterprises. Clear construction safety responsibility, and implement "Who construction, who is responsible for security" system, the responsibility to the elasticity of the tensile steel bearing] [ball joints, layers of responsibility, effectively the implementation of safety construction into practice. Strengthen construction safety promotion, in a conspicuous place of the construction site banners, warning signs to remind construction workers; construction workers enter the construction site need to wear a helmet; construction equipment, machinery and use every day before a routine inspection, especially rope, belts per Zhou also conduct a performance checks to ensure integrity. [Seismic] ball hinge support is generally in the lower part of the structure to determine the location, with the pad temporarily fixed. To adapt to the bearing pads are arranged evenly supported at the upper part of the bridge structure construction will not cause the sinking and moving. After the upper structure construction is completed, before perfusion mortar, make the necessary adjustments in order to determine the exact location of the final seat. Ball hinge support before [the earthquake] perfusion reserve must be confirmed with the bearing hole bottom surface of the bottom surface of the gap should be lower stopper 30mm, carefully clean holes for inside and around the state to keep moist. [Seismic] ball joints bearing pad stone mortar perfusion hinged steel ball bearings, as long as the conditions are not very difficult, you should use non-shrink mortar better. [Seismic] ball bearing hinge supported bridges jacks and temporary support base, must only be dismantled after the support cushion stone mortar full health, this is a problem that deserves attention. [Seismic] ball bearing hinge specifications and quality should meet the design requirements, unidirectional seismic slip the ball joint bearing assembling steel bearing ball joints [earthquake], the bottom surface and the top surface (embedded in the top of the pier and beam bottom surface) of the steel plate to be embedded in dense. Should be formed between the plate and the holder of tight, stand surrounded by more than 0.3mm gap may not have finished [fixed] seismic bearing steel ball joints, and should strictly be kept clean. Movable bearing PTFE plate and stainless steel plate may not have scratches, bruises. Rubber blocks should be sealed in a mixing bowl, to exclude the air, keep close. [Seismic] steel ball bearing hinge development and construction since the 1980s, the space frame structure common in the hangar, waiting for planes hug, stadiums, high, empty, big (height, space, span) used in buildings; energy-saving windows and doors curtain wall construction and widely used in large-scale public construction and residential; and since the reform and opening up high-rise steel (including steel reinforced concrete structures), poured into the civil construction field, making steel construction, more mature technology, more stable in quality. Steel housing has brought to the housing industry and the construction industry had a deep-seated revolution, from design, construction, use of new materials to a series of revolutionary changes have emerged, which in the international context of the future of housing development of new models. Precast [seismic] ball pin hinge construction sequence and precautions generally be summarized as follows: 1. Press the cast of [seismic] ball joint bearing pad stone cleaning and regulatory requirements, pre-deal support cushion stone. 2. precast side does not lay [the earthquake] ball bearing hinge of the bottom surface treatment: the bottom plane in contact with the bearing precast beams should ensure that the level and flat, if there is a cellular or tilt should be pre-tamped with cement mortar, leveling. 3. [seismic] ball joint bearing requirements is correctly seated in place to press cast beams, the [earthquake] ball joint seat in the stone piers pad in place according to the design center position. When the girder off the beam, T-beam longitudinal axis should coincide with the bearing centerline; plate girder and box girder should be parallel to the longitudinal axis of the bearing centerline. In order to drop the beam accurately, in the erection of the first inter-plate girder or box girder can be pre-mark the end of the beam position holder cross the center line, and mark the position of the center line of two mounts in the facade of the beam ends The vertical line, so that the beam is off the pier on the position coincides with the center line of the future can be in accordance with the number of cross-reference beam off the first cross beams.