1. Exercise #2 (part 2)
Based on what you read in Chapter 4, determine if the corridors and exit doors meet the requirements for egress width, according to the IBC.
Use the information determined in the first part of Exercise 1 along with Table : Egress Width Per Occupant Served.
Show your calculations for egress widths of doors and corridors.
Be prepared to turn in part 1 and part 2 of Exercise #2 at the beginning of next class.

2. Fire-Resistant Materials & Assemblies
Part 1
Chapter 5

3. Fire Prevention
Construction Type (Chapter 3): assigns hourly fire-resistance rating to almost every structural element, including structural walls & floors
Fire & life safety codes: place restrictions on building materials used inside the building
Interior walls, windows, doors, ductwork, wiring, plumbing pipes, finishes & furniture, etc.
All considered combustible fuel loads.

4. Systems to Promote Fire Safety
Passive Systems
Once in place, nothing else has to occur to be part of the control of a fire:
Fire & smoke barriers & partitions
walls
Horizontal assemblies
Floors, ceilings
Opening protectives
Windows, doors
Through-penetration protectives
Firestops, draftstops, dampers
Finishes & furniture

5. Systems to Promote Fire Safety
Active Systems
Have to be activated in order to work against the fire
Detection systems
Detectors, fire alarms, communication systems
Extinguishing and suppression systems
Fires extinguishers, fires hoses, sprinkler systems
Emergency lighting

6. Systems to Promote Fire Safety
Exiting Systems
Elements of a building that assist and direct occupants to a place of safety
Means of egress
Corridors, exits, stairs, ramps, etc.
Exit communication systems
Signage, audible, visual communication

7. Compartmentalization
Overall concept of passive fire-protection
Separation of areas in a building to control fire and smoke by the use of wall, floor, and ceiling assemblies
Some are required to be fire rated, some will need to be smoke rated, some will be a combo of both
Important to note: Fire resistance ratings DO NOT necessarily resist the spread of smoke

8. Fire Walls (party walls)
Fire walls have a separate foundation from the rest of the building and extends to the roof
Fire walls & side of building connected to it are designed to remain intact even when the other side of the building is demolished in an emergency
Can divide a building that has 2 types of construction
Ex: connecting a medical office building with a hospital that has a different building type
Or to create building divisions within the same construction type
Ex: Factory that has exceeded allowable area – fire walls break up the building into separate buildings
Rating: 2 – 4 hours
Determined by occupancy classification and Table 705.4

9. Typically, fire walls are usually planned & built during initial construction
May not be part of an interior project BUT:
If you are punching through a fire wall (to add a door, window, etc) the door/window assemblies must maintain the same fire rating as the fire wall.

10. Fire-Rated Assemblies
Create compartments within a building or space: horizontally & vertically
Fire barriers
Vertical building elements like walls & shaft enclosures
Fire partitions
Horizontal assemblies
Floor/ceiling or ceiling/roof assemblies that have a fire rating

11. Fire Barriers: continuous from top of floor assembly to bottom of floor/ceiling assembly
Limited number of openings allowed
Full enclosure
Fire Partitions: less restrictive. Most often used to separate types of spaces
Occupiable space, dwelling unit, sleeping unit, guest room/suite, living area/room, habitable room (see inset in textbook, chapter 2)
Number of openings is not restricted (although are required to be rated)
Horizontal Assembly: same function as fire barriers, but horizontal instead of vertical

12. Fire Areas:
created by fire barriers and/or fire walls and/or horizontal assembly to provide compartmentalization = limits the spread of fire
Can divide a building into separate areas, that may allow one area to be sprinklered and one not
Used to separate different occupancies

13. Occupancy Separation
Occupancies that have dissimilar risk factors are required to be separated by fire barriers or horizontal assembly
Required for horizontally adjacent spaces as well as vertically adjacent spaces
Note: when deciding on the rating for a horizontal assembly (floor/ceiling) make sure to check Building Type rating as well – use the strictest one.

15. Other Types of Separation
Tenant Separation
only required within a covered mall – stores/restaurants need to be separated by fire partition.
Dwelling & Sleeping Unit Separation
Fire partitions & Building Type
Incidental Use Areas or Rooms (see Table 508.2)
Machine and storage rooms are required to be enclosed by fire barriers
Vertical Shaft Enclosures
Elevators, dumbwaiters, mechanical chases, & staircases are required to be enclosed by fire barriers. Fire rating is determined by how many floors are penetrated – horizontal assembly is often required at the top and bottom.

18. Rated Means of Egress Stairs Horizontal Exits Areas of Refuge
Compartmentalized = fire barriers that are vertically continuous through each floor & horizontal assemblies with minimal penetrations
Horizontal Exits
Provides an exit away from the fire using fire barriers to provide and exit from one space into another on the same floor
Areas of Refuge
Required as part of an accessible exit.
Required to be separated by a smoke barrier (which provides a fire-rating of 1 hour)
Corridors
Typically exit-access corridors are required to be rated, while corridors within a small tenant space are not

19. Exit-Access Corridors: lead to an exit
Typically rated 1 hour: refer to Table
IBC: calls for fire partition (doesn’t affect horizontal assemblies) so you must refer to Building Type to get required rating for floor/ceiling
Exit Passageways: corridors used as exits
Typically have a 2 hour rating
IBC & NFPA: both call for fire barriers with horizontal assemblies that match fire-rating

21. Homework
Read Chapter 6, complete part 2 of exercise #2, and complete the following:
Exercise #3: From the floorplan provided to you in class and based on your reading and class lectures, determine the following (re-drawn the floorplan to include):
Occupant Classification & Occupant Load for each space
Occupant load for the entire floor
Travel distance & Path of travel (from each room to exit access, from exit access to exit)
Egress width (doors & corridor)
Which walls are fire-rated? Determine the fire-rating for each and include your reasoning.
Call out:
Exit passageway
Access corridor
Area(s) of refuge
Horizontal exit
Due next class – will be collected.