Agenda - 06-16-2015-13 (7) - Laserfiche WebLink

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3 Physical Assessment, page 3 The second floor framing, which consists of original 1938 framing, except for the area adjacent to the elevator that was added in 1989, can safely support a live load of 45 PSF at the area to the rear of the building and a live load of 50 PSF at the southwest and southeast areas. Based on the current North Carolina State Building Code, the areas with live load capacity of 45 PSF would be limited to uses such hotel, multifamily private rooms (Homeless Center) and school classrooms. The areas with at least 50 PSF live load capacities would be limited to the uses such as offices and the uses stated above. The current live load capacities are based on a total dead load of 35 PSF, which includes 25 PSF for the concrete slab and 10 PSF for ceilings, mechanical, electrical, plumbing, and partitions. Needing to keep the weight of the partitions within the 10 PSF dead load, will greatly limit flexibility in planning for use of the current space and in any potential modifications. Anticipated uses of the building would likely require a higher live load. To allowing for accommodating maximum use and flexibility of the spaces, the engineer undertook to explore options to increase the design live load capacity of the floors. The engineer's opinion is that the most cost effective and feasible way to increase the capacity of the floors is to remove those portions of the existing floor framing designed for 45 to 50PSF and replace them with new structure designed for 100PSF. This would be similar to what was done on the first floor as part of the 1989 renovations. New framing will consist of open web steel joists, spaced at 2 feet on center, with 2 inch concrete slab on 26 gage metal form deck, reinforced with 6x6 W2.1xW2.1 Welded Wire Fabric. At the southwest corner of the first floor, the new framing could incorporate an anticipated handicap accessible ramp which is discussed below. This would require at least one new column and foundation pad in the basement to support the beam just to the west of the front entrance. The attached structural engineering analysis illustrates the new framing and the approximate location of the new column. The defined areas for the required remedy at approximately 600 square feet on the first floor and 2200 square feet on the second floor. For planning purposes, the engineer estimated that the cost of the construction to remove and replace structural floor framing system to be between $110 and $150 per square foot. The amounts are rough estimates do not include any costs associated with de-construction, removal and replacement of architectural, mechanical, electrical, or plumbing components. Cost for that work is assumed to be part of the overall up fit of the building. Accessibility In 1989, accessibility to the facility was improved with a Dover elevator and a ramp to the basement. The accessible entry into the building is through the basement. Although this may meet the technical requirements of the building code, an analysis of a front door accessible was undertaken. Although there are still some issues to be detailed, it appears that a ramp from the Rosemary Street and Columbia Street can be made to the level of the front door. The front door is 4'- 0". With modification to the current landing and steps access into the building can be made. The platform inside the door is 4'x8' and is 1'-6" below the first floor level. An 18' interior ramp, framed as part of the new floor on the south west corner, can be created to meet the 18 rise necessary. The dimensions of the existing Dover elevator would indicate that it is adequate to meet the accessible standards. It is recommended that the existing elevator be reviewed by experts for maintenance or replacement.