C o m m o d i t y D e s c r i p t i o n
Item
Vibration Isolator for Seismic Mass
Description
This proposal contain subsection.
1) Spring unit (20ea)
·5 units should be installed in 4 sides of seismic mass (length:
about 6.8m)
·Dimension : 250mm x 500mm
·Interface of seismic mass : 220mm x 350mm
·Each unit should be compressed initially to installed below
seismic mass and thereafter each unit can be released to
nominal height position
·Nominal height : 427mm
·Initial compressed height : 445mm
·Nominal load capacity : > 17 tons / each
·Vertical spring rate: 2.2 kN/mm (tolerance +/- 10% )
·Horizontal spring rate: 0.3 kN/mm (tolerance +/- 10% )
·Non-slip layer should be attached on the side of interface plane
·After whole installation, the unit is free to adjust the height
2) Viscous Damper (4ea)
·4 units should be installed in 4 corner of seismic mass
·Dimension : 250mm x 250mm
·Interface of seismic mass : 210mm x 210mm (Fixed by M16 bolts 4EA)
·Nominal height : 427mm
·Vertical damping rate: 130 kNs/m (tolerance +/- 10%)
·Horizontal spring rate: 80 kNs/m (tolerance +/- 10%)
·Non-slip layer should be attached on the side of interface plane
·After whole installation, the unit is free to adjust the height