Special steel truss bearing steel truss bearing special projects based on the use of agency performance and bearing can be divided into four types: sliding grid bearing, universal rotation slip grid bearing, Wan Turn the grid to slip elastic vibration bearings, sliding bearing steel grid. [Slip] grid merits a steel bearing, bearing steel truss [slip] using spherical contact, a large contact area, low pressure, mass force uniform, small, less steel. 2, universal holder can carry, can withstand the pressure, shear forces and pull in any direction. 3, the carrier can be universal rotation, to release the bending moment in any direction. [4] uses sliding bearing steel truss damping spring, damping required to meet the high intensity area of ??engineering structures. 5, the force bearing parts are made of steel, in 200 years, there is no problem of aging. 6, bearing PTEE products used in its friction coefficient is small, aging resistance, low temperature up to -150 ℃, to ensure that the universal bearing rotation flexibility and application in cold northern regions. 7. [] Anti-slip grid steel bearing force focused, clear and not change with the angle. 8, the role of the lower bearing structure (column, pier) by force. 9, [slip] grid steel bearing dynamic and static rigidity, ensuring the smooth operation of the vehicle. 10, low seat height, favorable structural design of the bridge. [Slip] bearing steel truss design and manufacturing principles 1, uniformly structured body, both in the plane or facade structure layout, have sought to make the geometry, stiffness, ductility uniformly structured, improve the strength and ductility of the structure and components . 2, multi-channel vibration defense. 3, anti-brittle and unstable failure. 4, to prevent material aging. Slip bearing steel grid Stainless steel plate, PTFE plate, rubber seals, etc. according to JT391-2009 standard regulations, according to which the damping spring automotive leaf spring technology QCn29035-91 conditional execution. Cast by GB / T11352-1989, GB / T14408-1993 standards. [Slip] grid steel bearing maintenance and conservation: 1. Supports use during an inspection should be conducted regularly and maintain a year. 2, loose anchor bolt nuts, bolts checked whether the cut, clean to prevent rust, and then re-tighten. 3, bolts, check tensile steel bolts loose on whether the cut, clean to avoid rust, and then re-tighten. 4. Check for cracks and peeling paint, rust weld, welding, and if you should re-paint. 5. Check whether bearing roof and tensile steel yielding. 6, peeling paint, rusted steel Department should re-paint. 7. Check whether the damping rubber cracking and aging. 8, the amount of displacement record holder by one, checking the relative displacement is uniform. 9, finishing bearing panels, cleaning debris and dust surrounding the pad stone. 10, fixed seat height variation inspection to check the wear of PTFE plate, seat height changes when more than 5mm, should be carefully examined to determine whether the replacement. 11, when special circumstances occur (such as earthquakes down, damaging winds, etc.), should be checked