| OCR Text |
Show Wasatch Block Building Mt. Pleasant, Utah Page 4 The added weight of the of the newly installed 2x6 floor and sheathing over the original second floor has added additional weight to the already inadequate lateral force resisting system in the east to west direction, especially the south end. The new LVL beams below the upper roof trusses are inadequately sized to support the tributary roof load should the trusses entirely fail. The added column supporting the beam located at the south end of the second floor increases the load bearing capacity of the beam. The added weight of the second floor overlay increases the load imposed on the main floor beams under the columns. These beams appear to be inadequately sized and supported to resist the imposed loads. In summary, the recent remodel has added some strengthening elements to this building. It has also added additional weight to be resisted by the existing structural systems. A comprehensive evaluation of this building is beyond the scope of this report. An accurate assessment of the feasibility of rehabilitating this building to meet current ASCE-41 standards would require a comprehensive evaluation and repair strategy. A comprehensive evaluation of the building would include the following: I. An evaluation of all gravity load resisting elements and systems including footings, foundations, walls, beams, columns, floor and roof framing, etc. 2. An evaluation of the lateral force resisting elements and systems including: wall anchorage for out of plane forces, connections for transferring diaphragm forces, aspect ratios of walls and parapets, etc. 3. Destructive and non-destructive testing of existing elements. 4. Detailed recommendations for strengthening the noted deficiencies. The extent of the evaluation and rehabilitation design would depend on the ASCE 41 performance level desired. The defined target building performance levels are as follows: Levell-A: Level I-B: Level3-C LeveI5-E: Operational Perfomlance Level Immediate Occupancy Performance Level Life Safety Performance Level Collapse Prevention Performance Level It should be understood that based on our initial observations, without replacing the foundation and main floor support system, it would be difficult to strengthen this building to meet even a Collapse Prevention Performance Level. It should also be understood that even if the building is rehabilitated to the life safety perfOlmance level, the building may be a total economic loss after a design seismic event. |