Varies from A to E, depending on how the structure is expected to behave throughout the event of an earthquake which in turn requires completely different degree of detailing requirement. Seismic Design Category (SDC). Varies from A to F, relying on how design and detailing is carried out. Seismic Soil Type. Varies from A to F, relying on how the waves journey by the soil. Seismic Zone. 0, 1, 2A, 2B, outdoor branch trimmer three and 4, relying on most ground acceleration of a specific area. Low Seismic Risk. Corresponds to zones 1 and 2A of UBC-97, seismic design class (SDC) A and B and Seismic performance category (SPC) A and outdoor branch trimmer B. Moderate Seismic Risk. Corresponds to zones 2B of UBC-97, seismic design class (SDC) C and Seismic efficiency category (SPC) C. High Seismic Risk. Corresponds to zones 3 and 4 of UBC-97, seismic design class (SDC) D, E and F and Seismic performance class (SPC) D and E. Lateral Load Resisting System.
Intermediate Moment Frame. A solid in place body that can resist lateral loads by flexural motion of its beams and columns and that may present some energy dissipation, comparatively better inelastic conduct and intermediate ductility in addition to the properties of strange moment frames. These frames must fulfill ACI 21.3. Ordinary Moment Frame. A forged in place frame that may resist smaller loads by flexural power of columns. However, inelastic conduct in the event of extreme earthquake is poor. It is not really helpful for seismic zones with larger anticipated seismic activity. These frames should satisfy ACI 21.2. Special Moment Frame. A solid in place frame, having column and shear walls, that may resist lateral hundreds by flexure of its members and has excellent inelastic behavior. The design and detailing of particular second frames is controlled by ACI 21.5 to 21.8. Structural Walls. Walls proportioned to resist combination of shears, moments, and axial forces induced by earth quake motions. A shear wall is a structural wall. Intermediate Pre cast structural wall. A precast wall with intermediate inelastic deformation capabilities. Requirements for these partitions are given in ACI 21.4. Ordinary strengthened concrete structural wall. It is used to resist lateral loads however very limited inelastic deformation capabilities. Ordinary structural plain concrete wall. It's used for basement walls for residential or gentle business buildings in areas where seismic danger is very low. These wall could also be supported by soil, footings, grade beams or different structural members. Special precast structural wall. A precast wall complying with the necessities of ACI 21.8. as well as the necessities of ordinary strengthened concrete structural and necessities of ACI 21.2 is satisfied. Special strengthened concrete structural wall. A cast in place wall that can be utilized in excessive seismic activity regions and has good inelastic deformation capabilities.
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