Steel housing seismic level is how much?

Hainan Steel tells you: Steel housing seismic level is how much?
   1, the height near or equal to the height of the boundary should be allowed to bind irregularity of houses and grounds, ground conditions to determine the seismic level;
   2, in general, seismic level member of the structure should be the same; when the bearing capacity of a certain part of each member of the internal forces are to meet the requirements of 2 times the seismic combination under 7 to 9 degrees by members should be allowed to reduce seismic rating was OK . Hainan Steel