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The structural floor plan of a three-story (ground floor, two suspended floors, and a roof) office building is shown on the next page.
The structural floor plan of a three-story (ground floor, two suspended floors, and a roof) office building is shown on the next page. The roof covers the hole used for the elevator shaft and stairwells. The new building will be located in texas. The floor systems consist of one way pan joists slabs supported in one direction by beams located on column lines A through F. In addition, beams are located on column lines 1 and 4 as part of the lateral force resisting system.The design loads for the floor (in addition to the self-weight) include a superimposed dead load (SDL) of 20 psf to account for moveable partitions, ceiling panels, etc. and a superimposed live load (LL) to be determined from ASCE 7-10. In addition, a 0.5 kip/ft. wall load is applied around the building perimeter. The design loads for the roof (in addition to the self-weight)include a superimposed dead load (SDL) of 10 psf.
Determine moment and shear envelopes for the pan joist slab using the ACI coefficientmethod or a more rigorous elastic analysis (SAP 2000 or equivalent) and momentredistribution for the load combination of 1.2 DL + 1.6 LL.
2. Determine the reinforcement required in the ribs for moment resistance.
3. Determine the required development based on the "shifted" moment envelopes.
- Attachment 1
- Attachment 2
