Appendix_AA_-_Prelim_Code_Analysis.pdf

PRELIMINARY CODE ANALYSIS

A. GENERAL

REFERENCES:

CODE YEAR TITLE

NFPA 1 2012 Fire Code

NFPA 10 2013 Standard for Portable Fire Extinguishers

NFPA 13 2013 Standard for the Installation of Sprinkler Systems

NFPA 14 2013 Standard for the Installation of Standpipe and Hose Systems

NFPA 24 2013 Standard for the Installation of Private Fire Service Mains and

Their Appurtenances

NFPA 70 2014 National Electric Code

NFPA 72 2013 National Fire Alarm and Signaling Code

NFPA 90A 2012 Standard for the Installation of Air-Conditioning and

Ventilation Systems

NFPA 101 2012 Life Safety Code

NFPA 241 2009 Standard for Safeguarding Construction, Alteration, and

Demolition Operations

NFPA 291 2013 Recommended Practice for Fire Flow Testing and Marking of

Hydrants

Other NFPA standards as applicable

UL Standards as appropriate

IBC 2012 International Building Code

IEBC 2012 International Existing Building Code

UFC 1-200-01 2010 General Building Requirements

UFC 3-600-01 2013 Fire Protection Engineering For Facilities

B. REQUIREMENTS

Dormitory B97 at Thule AFB, Greenland, will be provided with a fire alarm system, portable fire extinguishers, and complete automatic sprinkler protection. The fire alarm system will be provided in accordance with NFPA 72 and UFC 3-600-01. The automatic sprinkler system will be provided in accordance with the UFC 3-600-01 and NFPA 13, with Class I standpipes in each stairwell that comply with NFPA 14. Portable fire extinguishers will be provided in accordance with NFPA 10.

C. FIRE ALARM SYSTEM

The system will be an addressable system manufactured by Notifier (Model NFS2-640) in accordance with the base standard. It will utilize an addressable microprocessor based type system with manual and automatic alarm initiation. Signal transmission will be a multiplex format and be dedicated to fire alarm service only

Audible fire alarm indication will be provided via horns.

Visual alarm indication will be by synchronized strobes with clear lenses, marked “FIRE”.

The NAC (Notification Appliance Circuits) will be class “A”, survivability level “1”.

The SLC (Signal Line Circuits) will be class “A”, survivability level “1”.

The IDC (Initiating Device Circuits) circuits will be class “A”, survivability level “1”.

All fire alarm circuits shall be installed in conduit. Fire alarm conduit will be minimum ¾-inch, and will be marked with red stripes every 10 ft and with red face plates on all junction boxes.

Looped conduits will have a 4-ft horizontal separation, or a 10-ft vertical separation, in compliance with the recommendations of NFPA 72.

All signals from the fire alarm panel will be transmitted to the Thule AFB fire alarm system through a fiber optic cable connection to the base-wide network.

The building fire alarm control panel will be provided with a lockable cabinet. The FACP location will be the fire pump room on the 1 st floor.

D. MASS NOTIFICATION SYSTEM

A mass notification system will be provided to match the base standard, which is to use an IP-based PA system that does not strictly comply with UFC 4-021-01.

E. FIRE SUPPRESSION SYSTEM

The building will be fully protected with an automatic wet-pipe sprinkler system. The wet-pipe sprinkler system design will be in accordance with UFC 3-600-01 and NFPA 13. Each floor will have one sprinkler zone. Each zone will be provided with a separate riser consisting of an

OS&Y gate valve, tamper switch, flow switch, pressure gauge, test and drain valve assembly and drain line. Test and drain lines will be routed to a common drain line will discharge to grade at the exterior of the building. A remote inspector’s test connection, discharging outside, will be located at a remote portion of each zone.

Sprinkler hazard classifications for specific areas will be classified in accordance with UFC 3-

600-01 and NFPA 13.

Sprinklers will be quick response unless otherwise indicated.

A fire department wall type Siamese connection will be provided for the wet-pipe sprinkler system. The FDC will be located on the exterior of the building in a location as directed by the fire department. The FDC will be located 3-ft above grade to prevent concealment during heavy snows.

The incoming fire protection water line will be separate from the domestic water line to allow for the future connection to a dedicated fire protection water main. The diameter of the fire protection line is anticipated to be 6-in. An indicating type valve conforming to base standards will be provided on the incoming fire protection line. The incoming fire protection service will be routed directly to the first floor mechanical room. A reduced pressure zone (RPZ) backflow preventer shall be provided with OS&Y valves at each end to isolate the assembly.

The automatic sprinkler/standpipe system shall be designed to the criteria of UFC 3-600-01, NFPA 13 and NFPA 14. Listed quick response sprinklers shall be provided throughout the facility. Fire hose valve connections shall be provided on every floor within each stair. Hose valve connections shall include 2-1/2” angle valves for fire department use. Sprinkler densities shall be based in FM Data Sheet 3-26 as required by UFC 3-600-01. Sprinkler system densities and spacing shall be as follows:

Sprinkler System Design

Area Description Classification Density/Area

(gpm/sqft / sq ft)

Hose

Dwelling Units

HC-1

0.10 / 1,500 sqft 250 gpm for

60 minutes

Mechanical /

Electrical

Rooms

Mechanical equipment

HC-2

0.2/2000 250 gpm for

60 minutes

The base water supply is supplied by dedicated pumping stations. The pumps can be adjusted to accommodate the anticipated flow and pressure requirements anticipated on the base. Hydraulic calculations for the fire suppression systems shall be based on the following water supply information:

Static Pressure: 68 psi

Residual Pressure: 62 psi

Flow: 1,244 psi

Estimated sprinkler system demand:

Demand (GPM) = Density (GPM/ft ) x Area (ft

) x Safety Factor + Hose Stream (GPM)

Light Hazard Areas:

= 0.10 GPM / ft x 1,500 ft x 1.2 + 250 GPM = 430 GPM

= 180 GPM + 250 GPM = 430 GPM

Estimated Required Pressure for 3rd Floor:

Elevation (40 ft): 17 psi

End Head Pressure: 13 psi

Backflow Preventer: 12 psi

Total Pressure required without consideration for friction loss: 42 psi

Available pressure at system demand (430 GPM): 67 psi

Since the available pressure at the system demand is sufficiently greater than the required pressure, a fire pump is not required.

F. STANDPIPES

Class I automatic wet standpipes in accordance with NFPA 14 are desired by the Air Force, and so the design requires standpipes in each stairwell, with 2-1/2” angle valve hose outlets at each floor stair landing and within the storage area.

G. CODE ANALYSIS

Minimum Construction Type of: Type IIB (IBC §602)

Sprinkler System: Fully Sprinklered

Use and Occupancy: Residential (R-2) (IBC §310)

Dormitory – NFPA 101, Chapter 29

H. REQUIRED FIRE RESISTANCE RATINGS

Structural Frame 0 Hrs IBC Table 601

Exterior Bearing Walls 0 Hrs IBC Table 601

Interior Bearing Walls 0 Hrs IBC Table 601

Non-Bearing Interior Walls 0 Hrs IBC Table 601

Roof Construction 0 Hrs IBC Table 601

Shaft Enclosures (< 4

Stories)

1 Hr NFPA §101 8.6.5(2)

Stair Enclosures (< 4 Stories) 1 Hr NFPA 101 §7.1.3.2.1(1)

Separation between dwelling units (floors and walls)

30 Mn IBC §420.3 and §711.3 – floors

IBC §420.3 and §708.4 - walls

Protection of Openings:

Fire and Smoke Dampers: Fire and smoke dampers shall be installed in accordance with NFPA

90A and IBC §717.5. Fire dampers will be provided in all air transfer openings in partitions that are required to have a fire resistance rating and in which other openings are required to be protected. Smoke dampers will be installed at or adjacent to the point where air ducts pass through required smoke barriers and shaft penetrations. Fire dampers are not required in ducts penetrating assemblies with 1-hour fire resistance rating in accordance with IBC §717.5.2, exception 3.

Door Fire Resistance Ratings (IBC Table 716.5)

1-hour fire barrier wall: ¾-hour

1-hour fire barrier enclosing shafts, exit enclosures and exit passageways: 1-hour

The maximum area of protected and unprotected openings in exterior walls is limited by IBC section 705.8.

I. EGRESS ANALYSIS

Maximum Travel Distance to Exit:

Residential: 200 ft – (NFPA 101 §28.2.6.3.3.1)

Measured from guest room door

Maximum Dead-end Corridor:

Residential: 50 ft – (NFPA 101 §28.2.5.6)

Maximum Common Path of Travel:

Residential: 50 ft – (NFPA 101 §28.2.5.4)

Minimum Egress Width (Clear Width):

Doors: 32 in (NFPA 101 §7.2.1.2.4)

Capacity: 0.2 in / occupant (NFPA 101 §7.3.3.1) – Doors and other horizontal components

Stairs: 44 in (NFPA 101 §7.2.2.2.1.2)

Capacity: 0.3 in / occupant (NFPA 101 §7.3.3.1)

Occupant Load (NFPA 101 §7.3.1):

The occupant load of the building shall be determined using the appropriate occupant load factors for the use of the facility or area in question.

Use (Occupancy) Occupant Load Factor

(NFPA 101 §7.3.1.2)

(ft per person)

Residential (R-2) 200 gross

J. PROPRIETARY EQUIPMENT

The following proprietary fire protection equipment will be required for this project.

Item Make/Model Approx.

Cost

Justification

Fire alarm panel

Notifier NFS

$3000 Item must be consistent with system currently in use on post.

K. FIRE HYDRANTS

Fire Hydrants shall be provided in accordance with UFC 3-600-01, NFPA 24 and NFPA 1963.

Hydrants must be aboveground type.

Hydrants must be installed adjacent to paved areas, accessible to fire department apparatus. For installation requirements, refer to UFC 3-600-01, §3-7.3.1 and §3-7.3.2.

A sufficient number of hydrants must be provided so that hose stream demand can be met without taking more than 1,250 gpm from any single hydrant. Hydrants must be spaced at intervals no greater than 300 feet in accordance with UFC 3-600-01 §3-7.3.3. Hydrants must be located with consideration given to emergency vehicle access. At least one hydrant must be located within 150 feet of the fire department connection (UFC 3-600-01, §3-7.3).

Hydrants located adjacent to parking areas or other vehicle traffic areas must be protected by bollards.

Fire hydrants must be UL listed, FM approved, or listed or classified by another NRTL and must have two 2-1/2-inch hose outlets and one 4-1/2-inch suction connection with national standard fire hose threads.

L. FIRE DEPARTMENT ACCESS

Dormitory B97 must have at least one means of all-weather ground access to allow emergency vehicles unimpeded access to the building. All-weather ground access must be paved, start from the road, and terminate no farther than 33 feet from the building, except that an engineered all-weather surface that is not paved may be provided if approved by the AHJ. All-weather ground access surface for pumper apparatus within 150 feet of fire department connections shall be provided (UFC 3-600-01, §2-10.4).

Force protection equipment, such as bollards or gates, must not require more than one person to remove or open. Access may require fire apparatus to drive over a curb. Any locking device controlling vehicle access must be under control of the fire department or 24-hour security personnel located at the specific facility. Dimensions of fire lanes and turnarounds must comply with the following (NFPA 1 Chapter 18):

Minimum unobstructed width of access road: 20 ft (NFPA 1 §18.2.3.4.1.1)

Minimum unobstructed vertical clearance: 13.5 ft (NFPA 1 §18.2.3.4.1.2)

Turning radius as approved by AHJ (NFPA 1 §18.2.3.4.3)

Access roads over 150 ft long shall be provided with AHJ-approved provisions for fire apparatus to turn around (NFPA 1 §18.2.3.4.4)

M. INTERIOR FINISH

Interior finish shall comply with IBC Table 803.9

N. EMERGENCY LIGHTING

Emergency lighting required in accordance with NFPA 101 §7.9. Emergency illumination shall be provided for a minimum of 1.5 hours in the event of failure of normal lighting.

Emergency lighting fixtures shall be arranged to provide initial illumination that is not less than an average of 1 ft-candle and, at any point, not less than 0.1 ft-candle measured along the path of egress at floor level.

O. ILLUMINATION OF MEANS OF EGRESS

The floors and other walking surfaces within an exit and within the portions of the exit access and exit discharge designated in NFPA 101 §7.8.1.1 shall be illuminated to at least the following values at floor or walking surface level:

The minimum illumination shall be 1 ft-candle (NFPA 101 §7.8.1.3(2)) for floors and walking surfaces other than stairs. The minimum illumination for stairs shall be 10 ft-candle (NFPA 101 §7.8.1.3(1)).

Illumination shall be arranged so that the failure of any single lighting unit does not result in an illumination level of less than 0.2 ft-candle in any designated area (NFPA

101 §7.8.1.4).

P. MARKING OF MEANS OF EGRESS

Means of egress shall have signs in accordance with NFPA §7.10. Exits shall be marked by an approved sign that is readily visible from any direction of exit access. Exit signs shall be provided with an emergency power source.

Building Use

Group

Exit Enclosure and

Exit Passageways

Corridors Rooms and

Enclosed Spaces

Residential C C C