concealed spaces - participant guide
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Concealed Spaces - Participant GuideTRANSCRIPT
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Protection of Concealed Spaces
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James D LakeJames D. Lake
Vice President of Training and Communication
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Learning Objectives
• Describe a concealed space within a building.
• Use the NFPA 13 standard to determine whereUse the NFPA 13 standard to determine where sprinklers are permitted to be omitted in concealed spaces of buildings.
• Explain why sprinklers are permitted to be omitted from these spaces.
• Explain the differences between NFPA 13 and NFPA 13R with regard to concealed spaces.
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What is a Concealed Space?
Non‐Combustible Concealed Space
Protected Combustible Concealed Space
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Created by Drake Exhibits
Protected Non‐Combustible building structure Protected Combustible
Vestibule Roof Structure
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What is a Concealed Space?
• No Formal Definition
However:
• Enclosed on All Sides
• Limited or No Access
• Not Intended for OccupancyNot Intended for Occupancy
• Not Intended for Storage
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Why are Concealed Spaces Important?
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Courtesy of Drake Exhibits
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8.15.1.1
• Concealed spaces of exposed combustible construction shall be protected by sprinklers.
• Except in concealed spaces where sprinklers are not required to be installed by 8.15.1.2.1 through 8.15.1.2.18 and 8.15.6.
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Question
• Where NFPA 13 refers to noncombustible and limited combustible construction, is the use of the terms in reference to building construction or to the type of combustible loading within the space?
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8.15.1.2
• Why are sprinklers permitted to be omitted from certain concealed spaces?
• Access
• Fuel Load
• Physically Impractical
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8.15.1.2.1
• 8.15.1.2.1* Concealed spaces of noncombustible and limited‐combustible construction with minimal combustible loading having no access shall not require sprinklerrequire sprinkler protection.
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8.15.1.2.1
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8.15.1.2.1.1
• The space shall be considered a concealed space even with small openings such as those used as return air for a plenum.
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Small Openings?
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Small Openings?
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8.15.1.2.2
• 8.15.1.2.2 Concealed spaces of noncombustible and limited‐combustible construction with limited access and not permitting occupancy or storage of combustibles shall notcombustibles shall not require sprinkler protection.
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8.15.1.2.3
Wood DeckingWood Decking
Ceiling
6 in. Max
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8.15.1.2.4
Floor Deck
<6in
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Ceiling
8.15.1.2.5
Wood Joists or Similar Solid MembersWood Decking Members
14 in. Max
6 in. Max
Wood Decking
Ceiling
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8.15.1.2.6
Roof or Floor Above
BattInsulation 3.5 in
Roof or Floor Above
Gypsum Board
Firestopped
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Resilient Channel
8.15.1.2.7
Roof or Floor AboveRoof or Floor Above
Ceiling
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8.15.1.2.8
FireStop
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160 ft3
Insulation
???Questions???
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8.15.1.2.9
Concealed spaces over isolated small rooms not exceeding 55 ft2 in area
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8.15.1.2.10
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8.15.1.2.10
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8.15.1.2.11
Fire Retardant Treated
Wood Joists
Fire Retardant Treated Wood Decking
Ceiling
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A.8.15.1.2.11
Wood Joists
Wood Decking
Ceiling
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8.15.1.2.12
• Noncombustible concealed spaces having exposed combustible insulation where the heat content of the facing and substrate of the insulation material does not exceed 1000 Btu/ft2 shall not require sprinkler protection.
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8.15.1.2.13
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8.15.1.2.14
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8.15.1.2.15
Combustible Exterior RoofCombustible Exterior RoofWith Sprinkler Protection
5 ft diameter Hollow Column
No Sprinklers
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pRequired
8.15.1.2.16
Roof or Subfloor
Sprinklers within the Trusses
Wood Truss
Insulation
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Ceiling
Concealed Space Below Truss Bottom Chords
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8.15.1.2.17
R f Fl AbRoof or Floor Above
Batt insulation meeting non or limited combustible
Composite or Solid wood joist
Wrapped/overlappedand stapled per
f d i
2 in. Max
Noncombustible Ceiling
non or limited combustiblemanufacturers recommendation
8.15.1.2.18
<160 ft3
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8.15.6
• Spaces Under ground Floors, Exterior Docks, and Platforms
– The space is not accessible
– Protected against wind‐borne debris accumulation
– No fuel‐fired equipment
– Floor above is of tight construction
N b tibl /fl bl li id h dl d b– No combustible/flammable liquids handled above
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???Questions???
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NFPA 13R and Concealed Spaces
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6.6.2
• Bathrooms. Sprinklers shall not be required in bathrooms where the bathroom area does not exceed 55 ft2.
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6.6.3
• Small Closets. Except where specified in 6.6.4, sprinklers shall not be required in clothes closets, linen closets, and pantries within dwelling units that meet all of the following conditions:
– The area of the space does not exceed 24 ft2
The least dimension does not exceed 3 ft– The least dimension does not exceed 3 ft
– The walls and ceilings are surfaced with noncombustible or limited‐combustible materials as defined by NFPA 220.
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Closets with HVAC Equipment
• 6.6.4* Sprinklers shall be installed in any closet used for heating and air‐conditioning equipment except as permitted by 6.6.7
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6.6.5
• Sprinklers not be required
– porches,
– balconies,
– corridors,
– carports,
– stairs that are open and attachedattached.
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6.6.6
• Sprinklers shall not be required…
– Attics
– Penthouse equipment rooms
– Elevator Machine Rooms
– Concealed Spaces
C l S– Crawl Spaces
– Floor Ceiling Spaces
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6.6.6
• Sprinklers shall not be required…
– Noncombustible Elevator Shafts
– other concealed spaces that are not used or intended for living purposes or storage and do not contain fuel‐fired equipment.
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6.6.6.1
• When fuel‐fired equipment is present, at least one quick‐response intermediate temperature sprinkler shall be installed above the equipment.
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6.6.7
Apartment A
Storage
Storage
xterior Corridor
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Apartment B
Ex
???Questions???
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Learning Objectives
• Describe a concealed space within a building.
• Use the NFPA 13 standard to determine whereUse the NFPA 13 standard to determine where sprinklers are permitted to be omitted in concealed spaces of buildings.
• Explain why sprinklers are permitted to be omitted from these spaces.
• Explain the differences between NFPA 13 and NFPA 13R with regard to concealed spaces.
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Resources
www.nfsa.org
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Thank You
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