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Utilizing IBC as a Reference

SCENARIO: An architect is designing a new student dormitory for a small liberal arts college in the Midwest. The upper four stories of the building contain residential units. The ground floor consists of the lobby, mail and package room, lounge, dormitory manager's office, restrooms, and a small gym. The residential floors are each 7,000 sq. ft. and the ground floor is 10,000 sq. ft. The sprinklered building is 60 ft tall with equal floor heights. It is classified as a nonseparated R-2 occupancy, Type IIB building. Refer to the 2018 IBC to answer the following questions.

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* 1. During a design meeting, the owner expresses interest in adding an additional residential floor to the building, which would be identical to the existing residential floors. The architect performs a code analysis to assess the feasibility of this design change. Which of the following statements is true?

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* 2. It is the beginning of the design development phase of a project, and the architect is performing a more in-depth code review. During schematic design, the entire building was classified as an R occupancy. The architect is now considering reclassifying the ground floor as group B. What is the required horizontal separation rating between the ground floor and the upper residential floors?

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* 3. The architect is reviewing the typical residential floor plan and is about to label the walls with their required fire ratings. Wall A separates residential units. Wall B separates residential units and the corridor. Wall C separates the corridor and the egress stair.  Which of the following matches the walls with the wall types that provide the minimum allowable fire resistance rating?

Wall Types:
I. One layer ⅝” gypsum board, 3 ⅝” stud, one layer ⅝” gypsum board
II. One layer ⅝” type X gypsum board, 3 ⅝” stud, one layer ⅝” type X gypsum board
III. Two layers ⅝” type X gypsum board, 3 ⅝” stud, two layers ⅝” type X gypsum board

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* 4. What is the calculated stairway width for the egress stairs in the residential portion of the building? Use the following formula.

Occupant load x means of egress capacity factor = total calculated stairway width

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* 5. During a design meeting, the owner announces they have just received funding for an additional dormitory. The college hopes to locate this dormitory adjacent to the short end of the dormitory the architect is currently designing. The owner tells the architect to assume this potential dormitory may be located as close as 15 ft to the original dormitory. What is the maximum area for exterior wall openings on the new dormitory building? Assume the openings are unprotected.

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