Building Code of the Philippines(1)

Interior walls permanent partitions and temporary

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Unformatted text preview: . Stresses shall be calculated as the effect of a force applied horizontally at each floor or roof level above the foundation. The force shall be assumed to come from any horizontal direction. (d) Minimum Earthquake Forces for Structure 1. Total lateral force and distribution of lateral forces. Every structure shall be designed and constructed to withstand minimum lateral seismic forces assumed to act non-currently in the direction of each of the main axes of the structure in accordance with the following formula: The value of K shall be not less than that exhibited in Table 2.01-A. The value of C shall be determined to accordance with the following formula: TABLE 2.01 - A HORIZONTAL FORCE FACTOR K FOR BUILDINGS OR OTHER STRUCTURES 1 TYPE OR ARRANGEMENT OF RESISTING ELEMENTS VALUE OF K2 All building framing systems except as hereinafter classified. 1.00 Buildings with a box system as defined in Section 2.01 (b) 1.33 Buildings with a dual bracing system consisting of a ductile moment resisting force in accordance with their relative rigidities considering with the following criteria: 1. The frames and shear walls shall resist the total lateral force in accordance with their relative rigidities considering the interaction of the shear walls and frames. 0.80 2. The shear walls acting independently of the ductile moment resisting frames shall resist the total required lateral force. 3. The ductile moment resisting space frame shall have the capacity to resist not less than 25 per cent of the required lateral force. Buildings with a ductile moment resisting space frame designed in accordance with the following criteria. The ductile moment resisting space frames shall have the capacity to resist the total required lateral force. 0.67 Elevated tanks plus full contents, on four or more cross-braced legs and not supported by a building, 3, 4, 5. 3.00 Structures other than buildings and other than those set forth in Table 2.01-B. 2.00 1 Where prescribed wind loads produce higher stresses, these loads shall be used in lieu of the loads resulting from earthquake forces. 2 The coefficient may be modified by the Building Official upon advice of seismologists and structureal engineers specializing in seismic design. 3 The minimum values of KC shall be 0.12 and the maximum value of KC need not exceed 0.25. 4 For overturning, the factor J as set forth in Section 2.01 (h) shall be 1.00. 5 The torsional requirements of Section 2.01 (g) shall apply. TABLE 2.01 - B HORIZONTAL FACTOR Cp FOR PARTS OR PORTIONS OF BUILDINGS OR OTHER STRUCTURES PART OR PORTION OF BUILDINGS of Force Direction Exterior bearing and non-bearing walls, interior bearing walls and partitions interior non-bearing walls and partitions over 3 meters (10 feet) in height, masonry fences over 1.80 meters (6 feet) in height Cantilever parapet and other cantilever walls, except retaining walls Value of Cp Normal to flat surface surface 0.20 Normal to flat 1.00 Exterior and interior ornamentations and app...
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