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Chapter 3Chapter 3
Construction TypesConstruction Types
Con
stru
ctio
n ty
pes
Con
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ctio
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Identifies combustibility of building structure, non-structural skin, and interior elements
Some construction types restrict material usage more than others
Code lists minimum construction type required for specific types of occupancy
In conjunction with occupancy classification, determines a buildings’ maximum height and floor area
Key
ter
ms
Building HeightBuilding Height CombustibleCombustible Fire ResistiveFire Resistive Floor AreaFloor Area Limited CombustibleLimited Combustible Non CombustibleNon Combustible ProtectedProtected Story HeightStory Height UnprotectedUnprotected
Elements of ConstructionElements of Construction
Com
parin
g th
e C
odes
Com
parin
g th
e C
odes
Com
bust
ibili
ty: D
efin
ition
sC
ombu
stib
ility
: Def
initi
ons Noncombustible materialsNoncombustible materials – will not ignite, burn, – will not ignite, burn,
or release flammable vapors when subject to fire.or release flammable vapors when subject to fire.
Combustible materialsCombustible materials – are materials that will – are materials that will continue to burn when the flame source is continue to burn when the flame source is removed.removed.
Fire-resistant materials –Fire-resistant materials – once treated will delay once treated will delay the spread of fire by a designated time period and the spread of fire by a designated time period and can prevent or retard the passage of heat, hot can prevent or retard the passage of heat, hot gasses, and flames.gasses, and flames.
Types I – Noncombustible: Types I – Noncombustible: concrete or masonry bearing concrete or masonry bearing w/2 hour protection of w/2 hour protection of structurestructure
Type II – Noncombustible: Type II – Noncombustible: generally concrete or generally concrete or masonry bearing w/1 hour masonry bearing w/1 hour protection of structureprotection of structure
Type III – Combustible – Mix of Type III – Combustible – Mix of Combustible and Combustible and Combustible: exterior is Combustible: exterior is masonry bearing, interior is masonry bearing, interior is woodwood
Type IV - Mill or Heavy TimberType IV - Mill or Heavy Timber
Type V – Combustible: Type V – Combustible: residential stick or balloon residential stick or balloon framingframing
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CO
NS
TR
UC
TIO
N T
YP
ES
C
ON
ST
RU
CT
ION
TY
PE
S A
ND
AN
D B
UIL
DIN
G
BU
ILD
ING
S
IZE
SS
IZE
S Mixed Construction TypesMixed Construction Types Party wallParty wall Fire separation wall Fire separation wall
Occupancy RequirementsOccupancy Requirements Construction types limit occupancy typesConstruction types limit occupancy types Evacuation timeEvacuation time Assembly, Hazardous, and Institutional are the Assembly, Hazardous, and Institutional are the
stricteststrictest Jurisdictions often require both ICC and LSCJurisdictions often require both ICC and LSC
Fire
Sep
arat
ion
wal
lsF
ire S
epar
atio
n w
alls
Allo
wab
le h
iegh
ts a
nd b
uild
ing
area
sA
llow
able
hie
ghts
and
bui
ldin
g ar
eas
Allo
wab
le h
iegh
ts a
nd b
uild
ing
area
sA
llow
able
hie
ghts
and
bui
ldin
g ar
eas
Oth
er H
eigh
t and
Are
a Li
mita
tions
Oth
er H
eigh
t and
Are
a Li
mita
tions
Number of OccupantsNumber of Occupants Location of buildingLocation of building Access to siteAccess to site SprinklersSprinklers Fire WallsFire Walls HazardousHazardous Single StoriesSingle Stories MezzaninesMezzanines BasementsBasements
Sha
ftsS
hafts
Con
tinui
ty o
f fire
bar
rier
Con
tinui
ty o
f fire
bar
rier
Mez
zani
nes
Mez
zani
nes
Atr
iaA
tria
What about renovations What about renovations after a fire?after a fire?
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