Disclaimer: The weight of the ground floor was assumed to be transferred to the frame and not to the ground itself, and thus was included in the computation. For ground floor having slabs on fill, disregard the weight in that level.
FREQUENTLY ASKED QUESTION: FAQ Q: Sir, di po ba dapat 0 kN yung sa ground floor kasi nagrerest siya sa ground? (Sir, shouldn't the weight of the ground floor be disregarded since it is resting on the Ground itself?) A: More often than not, the WEIGHT OF THE GROUND FLOOR IS DISREGARDED. And thus, you are indeed correct. (0kN on the ground floor) Q: Then why did you include the weight of the ground floor in your computation, sir? A: I assumed that the weight of the ground floor rests on the structure and not on the ground (Which is very rarely considered). Obviously, the value solved here will not be equal to the base shear computed as if the ground floor weight is disregarded. But would definitely give a more conservative value.
Sorry for the super late reply. Anyway, depende sa case ng structure mo. If you are designing the structure in such a way na naka "on-fill" yung slab mo, and natratransfer yung weight niya directly to the ground and not to the structure, then zero (0) na yung weight mo dun. Pero if magdedesign kayo ng structure na yung slab mo sa first floor is magtratransfer pa din dun sa frame mo, then icoconsider mo yung weight niya. Usually ginagawa yan sa site na malambot yung natural grade line and may trust issues ka, or if ayaw mong may lumalabas na mass irregularity sa analysis mo. =)
Actually depende talaga sa basis mo ng format e. In some books, when you say 15 storeys with Roof Deck, 15 storeys + roof deck meaning nun (like in our example). In some cases, sinasama nila yung Roof Deck sa pagbilang ng storeys, if yun yung sinunod mong rule nung formating, then you are correct. =)
Hi sir! Question po. May nakita kasi akong computation wherein yung total seismic load niya is dead load above ground floor lang (excluded ang mismong ground floor). Can you please clarify this po? 🥺 thank you!
Hello! Depende sa case ng structure mo. If you are designing the structure in such a way na naka "on-fill" yung slab mo sa ground, and natratransfer yung weight niya directly to the ground and not to the structure, then zero (0) na yung weight mo dun. Pero if magdedesign kayo ng structure na yung slab mo sa first floor is magtratransfer pa din dun sa frame mo, then icoconsider mo yung weight niya. Usually ginagawa yan sa site na malambot yung natural grade line and may trust issues ka, or if ayaw mong may lumalabas na mass irregularity sa analysis mo. =)
Hello! Depende sa case ng structure mo. If you are designing the structure in such a way na naka "on-fill" yung slab mo sa ground, and natratransfer yung weight niya directly to the ground and not to the structure, then zero (0) na yung weight mo dun. Pero if magdedesign kayo ng structure na yung slab mo sa first floor is magtratransfer pa din dun sa frame mo, then icoconsider mo yung weight niya. Usually ginagawa yan sa site na malambot yung natural grade line and may trust issues ka, or if ayaw mong may lumalabas na mass irregularity sa analysis mo. =)
