conquest firespray fire rated ductwork warren michigan
TRANSCRIPT
Conquest FireSprayFire Rated Ductwork
Warren Michigan Warren Michigan
Manufacturing Capabilities
• Two fabrication facilities (130,000 + sq. ft.)• History of large projects (Ohio State Univ.)• Full 3D modeling & project management staff• All styles of duct (spiral, flat oval, rectangular,
welded)
Enclosure by Design:
• In the USA the predominate method for fire protection is subdivided into categories:• Compartments• Detection• Alarm/Notification• Evacuation• Sprinklers• Smoke Removal
Enclosure by Design:
• What about smoke removal?• Are we engineering a smoke removal
system tested for that use?• Or are we utilizing the existing
systems to perform a function they are not tested to provide?
Enclosure by Design:
• According to SMACNA and the corresponding British standard ventilation and exhaust ductwork have no tested fire resistive standard in their respective designs.
• That means the SMACNA tables are not designed to include a fire rating.
• HVAC systems with openings will introduce hot gasses into the duct that is not designed to handle.
What is Fire Rated Ductwork
• Search of 2009 IBC and 2009 IMC• No mention in the code of Fire
Resistive Ductwork• How do we handle Fire Resistive
Ductwork?
Enclosure by Design:
• There is no USA (ASTM) test today that recognizes fire rated duct systems.
• There is however an International Standard ISO 6944 (1985 and 2008) .
ISO 6944
• ISO 6944• Test Fire Resistive performance of
ductwork.• Test follows time temperature
curve in E119• Developed in EU for Fire Duct and
Smoke Extraction Ductwork.
ISO 6944
• ISO 6944• Tests Ductwork for 2 conditions
• Fire inside a duct Type B• Fire outside a duct Type A
• Conditions of the Test• Integrity• Stability• Insulation
Type A and Type B Duct(Wrap is only rated for Type A)
THE DUCT IS THE ENCLOSURE
Alternate Systems Drywall Enclosures
• Conventional Shaft Riser with 2 hour Rated Gypsum Enclosure (3 layers)
• Fire dampers must be in wall
Firewrap Insulated Duct• Insulated Fire Wrap•1 and 2 hr protection•Type A only (fire outside
the duct)•Upgraded Duct•Upgraded Supports•Multiple Trades
Alt. Wrap Enclosures
Classified for up to 2 & 4 hours as a smoke and fire duct (ISO-6944) and complies with NFPA 96
Fire Rated DuctTested and Classified by UL &
ETL
Fire Rated Ductwork
• US Codes are evolving to accept a duct as an enclosure.
• ASTM E2816-11 Metallic Fire Resistive Duct Enclosures.
• Passed Committee July 2011• ICC Evaluation Services
• Acceptance Criteria November 2011
Fire Rated Ductwork & Metalic Enclosure
• Test Procedure based on ISO 6944 (2008) standard• Tests Ductwork for both conditions
• Horizontal Condition A, C• Vertical Condition B, D
• Test for fire inside and outside the duct. You cannot guarantee a fire will remain outside the duct.
Fire Rated Ductwork & Metalic Enclosure
• Test Procedure based on ISO 6944 (2008) standard• Conditions of the Test
• Integrity• Stability• Insulation
• Test includes Hangers, Supports and Firestop conditions.
• Inserts and structural connections not inlcuded.
Grease Duct
• June 2012• ICC ES issued Acceptance Criteria
AC101.2 • Recognized galvanized duct without
porcelain coating.• Tested to conditions of UL1978
except for those related to coating.• Field enclosure
