1613.4 Seismic Design Requirements for Buildings Assigned to Seismic Design Category A
Buildings and other structures assigned to Seismic Design Category A need only comply with the requirements of this section. Nonstructural components of buildings and structures in Seismic Design Category A are exempt from seismic design requirements.
Exception: Tanks assigned to Risk Category IV shall satisfy the freeboard requirements of Section 220.127.116.11 of ASCE 7.
Each structure shall be analyzed for the effects of static lateral forces applied independently in each of two orthogonal directions. n each direction, the static lateral forces at all levels shall be applied simultaneously. For purposes of analysis, the force at each level shall be determined using Equation 16-36a.
Fx = The design lateral force applied at level x.
Wx = The portion of the total dead load of the structure, D, located or assigned to level x.