CH 5 Flashcards
(29 cards)
Interior finishes definition
pg 138
materials used for exposed face of the walls and ceilings of a building and are not limited to structural materials
interior finishes include:
(7)
pg 138
plaster
gypsum wallboard
wood paneling
ceiling tiles
plastic
fiberboard
wall coverings including decorative furnishings, vegetation, draperies
interior finishes can be classified as trim if:
(3)
pg 138
do not exceed ten percent of the wall and ceiling area
distributed through the space
do not constitute a large continuous surface area
flame spread over a specific material can be measured and predicted in degrees known as the surface burning characteristics of the material when evaluating the following:
(4)
pg 139
composition, orientation, thickness of material
ventilation
shape and size of compartment
finish material on the ceiling or wall
the most significant factor that determines a fuels burn rate is:
pg 139
the combination of the fuel and the available oxygen
Thin surface treatments
pg 130
building codes usually exclude reference to surface treatments such as paint and wallpaper that are no thicker than 1/28 of an inch
types of fire retardant coatings for interior finishes
(4)
pg 140
intumescent coatings
mastics
gas forming paints
cementitious and mineral fiber coatings
three functions of ceilings
pg 145
aesthetic concealment of building utilities
improved control of light diffusion and air circulation
change in interior decor, when added in older buildings
walls and partitions need to ________ to be considered compliant
pg 145
any kind of rated assembly used as a fire wall must match the listed parameters of the assembly to be considered compliant
fire walls
pg 146
fire walls must have sufficient fire resistance and structural stability to serve as an absolute barrier to a fire and structural collapse on either side of the wall
parapet height above a combustible roof is determined by code and varies from _____ to _____
pg 147
18-36 inches
fire ratings for fire walls
pg 147
international code council allows 2,3,4 hours.
historically they had to be 4 hours
may be exceptions for type V construction
enclosure walls
pg 149
block vertical spread of fire through a buildings openings:
stairwells
stairwell exit passageways
elevator shafts
pipe chases
required to have fire resistance rating of 1-2 hours depending on height of the building.
stairwells in buildings 4 stories or lower require 1 hour
stairwells taller than 4 stories require 2 hour
curtain walls serve the following functions:
(4)
pg 150
resist environmental loads
control heat loss
limit noise transmission
limit solar radiation
Fire doors are rated in increments of ___________
pg 152
from 20 minutes to 4 hours
curtain walls information
pg 151
often non load bearing
some are noncombustible with no fire rating (aluminum or glass)
codes may require exterior walls to have fire resistance based on the distance between buildings
fire door combination classification:
pg 152
time and letter based on type of opening
classifications of fire doors
(5)
pg 153
Class A: openings in fire walls
Class B: Openings in vertical shafts and openings in 2 hours rated partitions
Class C: Openings between rooms and corridors having a fire resistance rating of 1 hour or less
Class D: Openings in exterior walls subject to severe fire exposure from the outside of the building
Class E: Openings in exterior walls subject to moderate or light exposure form the outside
Fire door ratings based on the rating of the wall
pg 153
3-4 hour rated doors in walls with greater than 2 hour rating
doors rated 1.5 hours required for 2 hour rated vertical enclosures
1 hour doors for 1 hour vertical shaft enclosures and exit enclosures
there are no 2 hour rated doors!
inconsistencies and redundancies in fire door/wall codes
pg 153
opening in a 2 hour stairwell enclosure to be protected with a 1.5 hour fire door rather than a 2 hour door
require 2 3 hour doors to protect an opening in a 4 hour wall and not allow a 3 hour door to be used in combination with a 1.5 hour door to satisfy the requirement
rolling overhead doors are often installed in these locations
(4)
pg 154
along corridors to protect convenience openings
to protect an opening in a fire wall in an industrial occupancy
on one or both sides of a wall opening
at an opening in a wall that separates buildings
rolling overhead doors are made of interlocking steel slats with operating components including:
(4)
pg 154
releasing device
speed governor
counterbalance mechanism
wall guides
fusible link
horizontal sliding doors
pg 155
often found in older industrial buildings
held open by fusible link
slide along track by gravity or counterweight
swinging fire doors
pg 156
commonly protect stairwell enclosures and corridors
available with 20 min- 3 hour ratings
good for pedestrian traffic
