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  ‘ HAVEN ’  Structural Design Basis Report C. Kannan B.E., M.E (Structure) Consulting engineer PROPOSED CONSTRUCTION OF GROUND+1 VILLA ‘ HAVEN ’  AT AYANAMBAKKAM, THIRUVERKADU. PROJECT BRIEF This report sets out the basic parameters used for the structural design of the  proposed construction of Ground plus one proposed villa ‘ HAVEN ’  at Ayanambakkam, Thiruverkadu. This has been updated to incorporate the current information on the structure. STRUCTURAL SYSTEM The structural system adopted is as below, based on preliminary analysis and design, which have bean elucidated later in this report.    The building is basically a RC framed structure comprising of G+1 floors. The analysis and design are done using STAAD Pro software.    The foundation System comprises of deep foundation (pile) is adopted as per soil Test report.    All slabs are designed as conventional slabs. LOAD DATA (I)   DEAD LOAD Self-weight of the materials shall be calculated on the basis of unit weights given in IS : 875 (PART I) * Unit  weight of concrete - 25 KN/m 3 * Unit  weight of Bricks - 20 KN/m 3   * Floor  finishes considered - 2 KN/m 2    ‘ HAVEN ’  Structural Design Basis Report C. Kannan B.E., M.E (Structure) Consulting engineer (II)   LIVE LOAD On the basis of intended occupancy and uses, the loading shall be base on IS: 875 (PART II) (III)   WIND LOAD Wind loads for design of structures shall be based on the design wind speeds arrived on IS: 875 (PART III) The parameters for calculation of design wind speed as per IS: 875 (PART III) are as follows. Basic wind speed (V  b ) : 50 m/sec. Risk coefficient, K  1  (If design life of Structure is taken as 44 yrs) : 1.0 Terrain, Height, Structure size factor, K2 : To suit of the structure For terrain category-4 and class C appropriate is 0.67 Topography factor, K  3  : 1.0 Design wind speed (V z ) : Vb x K1 x K2 x K3 Design wind pressure (P z ) : 0.6Vz 2  : 0.6 x 33.5 2  : 0.673 kN/m 2  ‘ HAVEN ’  Structural Design Basis Report C. Kannan B.E., M.E (Structure) Consulting engineer (IV)   SEISMIC LOAD Seismic loads for design of structure shall be considered as per IS 1893-2002. Zone : III Zone factor : 0.16 Importance factor : 1 Response Reduction factor : 3.0 DESIGN LOAD COMBINATION The proposed building is designed using the limit state method with appropriate factors as per IS: 456-2000. The load combinations are as follows Load Combination 1.0 (DL+LL) 1.0(DL+WLX) 1.0(DL-WLX) 1.0(DL+WLZ) 1.0(DL-WLZ) 1.0(DL+SLX) 1.0(DL-SLX) 1.0(DL+SLZ) 1.0(DL-SLZ)  ‘ HAVEN ’  Structural Design Basis Report C. Kannan B.E., M.E (Structure) Consulting engineer 1.0DL+0.8LL+0.8WLX 1.0DL+0.8LL-0.8WLX 1.0DL+0.8LL+0.8WLZ 1.0DL+0.8LL-0.8WLZ 1.0DL+0.8LL+0.8SLX 1.0DL+0.8LL-0.8SLX 1.0DL+0.8LL+0.8SLZ 1.0DL+0.8LL-0.8SLZ Where DL - Dead load LL - Live load WLX, WLZ - Wind load in X and Z direction SLX, SLZ - seismic load in X and z direction. ADDITIONAL CRITERIA 1. The structure is idealized as 3d frame and analyzed using software package (STAAD Pro) for both vertical and lateral loads. 2. The lateral loads include wind loads and earthquake loads, seismic loads of medium And moderate intensity of Zone III is considered for analysis and design puropose. 3. The foundation is designed for critical un-factored load combinations. 4. The super structure members are designed for actual flexure, shear and forces. 5. The structure is analyzed for specific loads (Dead and live loads) and for the load Combinations given in relevant codes.
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