The Residences at Christina Landing Wilmington, DE

Transcription

1 5.0 FIRE PROTECTION EXISTING CONDITIONS 5.1 Project Specific Fire Protection Data Codes, Regulations, and Standards Building Officials and Code administrators (BOCA) National Building Code [1996] with City of Wilmington Amendments National Fire Protection Association (NFPA 101) Life Safety Code (LSC) [2000] Delaware State Fire Prevention Regulations including LSC [2000] Council of American Building Officials (CABO)/ American National Standards Institute (ANSI) Accessible and Usable Buildings and Facilities (A117.1) [1992] ANSI/ ASME Standard A17.1 Safety Code for Elevators and Escalators ICC International Mechanical Code [1996] ICC International Plumbing Code [1995] The National Electric Code (NEC) (NFPA 70) [1996] Use or Occupancy Non-Separated Mixed Use (BOCA)/ Mixed Occupancy (LSC) Residential Use Group: R-2 (BOCA) Assembly Use Group: A-3 (BOCA)/ Assembly Occupancy (LSC) Mechanical/ Electrical Uses Ordinary Hazard 20

2 Special Use or Occupancy High-Rise Building Requirements (BOCA 403) Building Automatic Sprinkler System Fire department communication system and fire command center provided Two-story Atrium Requirements (BOCA 404) Smoke control system not required in the atrium Height and Area Building Height: 240 feet to top of high parapet Area: 248,884 square feet 20 floors at approximately 12,000 square feet per floor 2 penthouse floors approximately 6,000 square feet per floor Type of Construction (BOCA Table 503) Type 1B, Protected Modified to 2A per Table , height and area are not limited Fire Performance Automatic Sprinkler System throughout Stair Pressurization Provide per BOCA , LSC Length of Exit Access Travel 250 feet (with automatic sprinkler system) Common Path of Travel Maximum 21

3 35 feet Dead-end Corridor Maximum 50 feet Travel Distance within Dwelling Unit Maximum 125 feet FIGURE 5: TYPICAL FLOOR LIFE SAFETY PLAN [REFER TO APPENDIX C FOR LIFE SAFETY PLANS] Stair Width With automatic sprinkler system provided throughout Stairs meet accessible portion of the code with 44 inch width Exit Stair Enclosure Doors Shall allow re-entry into interior of building (LSC ): on at least 2 levels 22

4 Not more than 4 stories intervening between re-entry floors Areas Gross Area for the Building: 248,884 GSF Each floor as follows: o 1 st floor: 10,200 GSF o 2 nd floor: 9,225 GSF o Typical floors (3-20): 12,012 GSF o 21 st floor: 6,785 GSF o 22 nd floor: 5,759 GSF Occupant Load A-3 Assembly Occupancy: 15 square feet (net) per occupant R-2: 200 square feet (gross) per occupant Apartment Unit Counts 2 nd floor units: (5) one-bedroom units Typical floor units: (6) one-bedroom units and (3) two-bedroom units Penthouse units: (4) one-bedroom units and (2) two-bedroom units Total apartment units: 173 Accessibility (BOCA ) (4) units will be required as type A units and (169) units will be type B units 23

5 5.2 Required Minimum Hourly Ratings Structure Elements (BOCA Table 602, Table Modifications for High-Rise Buildings, and LSC Table A-6-2.1) Required Minimum Hourly Rating** BOCA LSC Fire Separation Assemblies Fire Enclosure of Exits 2 hr 1 hr Shafts (Other than exits) and Elevator Hoistways 2 hr 1 hr Fire Partitions Exit Access Corridors 1/2 hr 1/2 hr Tennant Spaces Separation 1 hr Dwelling Unit Separation 1 hr 1 hr Smoke Barriers 1 hr 1 hr Interior Non-Load Bearing Walls 0 hr 0hr Structural Members Interior Load Bearing Walls, Load Bearing Partitions, Columns, Girders, Trusses (other than roof) and Framing Supporting more than one floor 3 hr 1 hr Structural Members supporting wall 1 1/2 hr 1 hr Floor Construction including beams 2 hr 1 hr Roof Construction including beams, trusses, framing, and roof deck 15 ft or less in height 1 hr 1 hr 24

6 **Most restrictive hourly rating applies 5.3 Miscellaneous The building has an automatic sprinkler system, smoke exhaust system, emergency audible and visual devices, and emergency lighting located throughout building. There is also a central fire alarm system control panel with voice evacuation master station and fireman s telephone master station. Every residence has single and multiple station smoke detectors that are monitored by the central fire alarm system, which is capable of contacting the fire department without human interaction. Fire rated partitions are located at exit access corridors, tenant space separations, dwelling unit separations, smoke barriers, and interior non-bearing walls. The minimum fire resistance rating is 2 hours for evacuation out of the building. Structural members must be fire protected on all sides with materials having the proper fire resistance rating, which for the existing building is accomplished through the use of concrete in the structural system. 25