HomeMy WebLinkAbout05120073 Correspondence
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People Helping People Build a Safer World'"
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PRESIDENT
HENR'f l. GREEN
hecutiveDirector
Bureau of Construction Codes & Fire Safety
Michigan Dept.of labor & Et:onomic Growth
lansing,Michigan
VlctPRESIDENT
WALLYBAILEY,C.B.O.
Director. Development
and Construction
ft. Smifh,Arkansas
SECRHARYITREASURER
STEVEN L SHAPIRO, C.B.O.
OireclorolCodesCcmpliance
Hampton, Virginia
IMMEOIATE PAST PRESIDENT
FRANK P. HODGE,JR., C.B.D" M,C,P.
Directllfof Building and
Fire Codes
Hilton Head Mend, South Carolina
EDWINM.BERKEL,C.F.I.
Fire Marshal
Mehlvil!eFireProtectionOistrict
St. louis, Missouri
JAMES L.BROTHERS
Building Director
Decatur,A/abama
TERRENCEl.COBB,C.B.D.
Director, Dept. of Codes Administration
NashVllle/Oeyidson County, Tennessee
JOHN DARNALL. C.B.O.
Assistant Director 01
DevelopmentServlcBS
Tumweter, Washington
WilLIAM L. DUCK, JR. C.B.O.
Oire~tor. Dept. of
Inspections and Code
Columbus, Georgia
WlllIAMD.DUPLER
BuildingOflicial
Chesterfield, Virginia
GERALDD.GEDRGE,C.B.O.
GhielBuildingOfficial
Boulder County, Coloredo
GREG JOHNSON
Building Inspector
SeinrPaulMinnesota
JOHNT.laTORRA
Building & Inspection Manager
Redwood my, Californie
RONALD LLYNN
BuifdinllOfficial
ClarkCounty,Nevada
RDNAloE.PIESTER,R.A.
Oirector, Division 01
Gode Enlorcement and Administration
StataolNewYork
Albany,NewY()rK
JAMES T. RYAN,C.B.O.
GodesAdministrator
Over/and Par*, Kansas
KEVINH.SCDTT
Deputy Fire Chial
01 Kern Gounty
Bakersfield, California
ADOLF A. ZUBIA
Fire Ghiaf
lasCfIlces, New Mexico
CHIEF EXECUTIVE OFfiCER
JAMESL.WITT
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Chicago DistriCt Office
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March 6, 2006 .
James Ochs, C.B.O.
City of Carmel
Department of Community Services
One Civic Square
Carmel, IN 46032
i1 0 5" \ '2 Q()7 j
Sections 714.1and 714.2 of the 2003 International Building Code
Dear Mr. Ochs:
RE:
This letter is in response to your question concerning the protection of structural
elements that support fire-resistance rated construction.
Based on your letter of February 14, 2006 and its attachment, your question, as I
understand it, is: Given a fully suppressed, 4-story office building of Type liB
construction, what portion, if any, of adjacent construction is required to be fire-
resistance rated in the following two instances?
Condition 1: The 2-hour vertical exit enclosures in this building are constructed of metal
studs and gypsum board. In each story the stair enclosure walls (fire barriers) are
supported on the floor slab.
Response: Structure that directly supports fire barrier walls must be protected to the
same degree as the fire barriers supported. In a steel frame building, the protection need
not extend beyJllliJ the ~tructural bay containing the fire barrier. stair enclosure, shaft,
etc. Protection shall include beams, girders, columns and the floor deck within the
structural bay containing the protected elements. This requirement applies regardless
of construction type or sprinkler suppression.
Condition 2: Other 2-hour shaft enclosures in this building use a gypsum shaft wall
assembly that is continuous from the slab on grade to the roof deck. The shafts are not
supported on intermediate floors but they are laterally braced to the adjacent
construction
Response: In this case, the entire gravity load of each shaft bears only on the grade
slab. Neither the surrounding construction nor the lateral bracing elements need
protection. The gypsum assembly must not exceed the unsupported height limitation
specified by the gypsum manufacturer.
We are pleased to provide you with the opinions stated herein. They are based solely
on information that you have provided. We have made no independent effort to verify
the accuracy of this information nor have we conducted a review beyond the scope of
your question. Understand that the final interpretation is always the legal responsibility
of the authority having jurisdiction.
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'\'hi:iP Hahn, LA
Senior Staff Architect
Headquarters: 5203 Lecsburg Pike, Suite 600 . Falls Church, VA 22041-3405 U.S.A.
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