Your SlideShare is downloading. ×
Chapter 05
Upcoming SlideShare
Loading in...5
×

Thanks for flagging this SlideShare!

Oops! An error has occurred.

×

Saving this for later?

Get the SlideShare app to save on your phone or tablet. Read anywhere, anytime - even offline.

Text the download link to your phone

Standard text messaging rates apply

Chapter 05

627
views

Published on

Published in: Business, Technology

0 Comments
2 Likes
Statistics
Notes
  • Be the first to comment

No Downloads
Views
Total Views
627
On Slideshare
0
From Embeds
0
Number of Embeds
0
Actions
Shares
0
Downloads
31
Comments
0
Likes
2
Embeds 0
No embeds

Report content
Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
No notes for slide

Transcript

  • 1. Chapter Five Fire-Resistive Construction Elements
  • 2. Learning Objectives
    • Describe the difference between specification codes and performance codes
    • Explain why a rated assembly must be maintained as a unit
  • 3. Learning Objectives
    • Describe origin of STTC and its significance
    • List three nationally recognized testing labs
    • Explain why labeling is mandated
  • 4. Specification Code
    • A code provision that specifies a type of construction or materials to be used
  • 5. Specification Code
    • “The protection on all floor and roof beams shall be at least one inch thick of concrete or porous terra-cotta or brick set in cement.”
      • 1916 Boston Building Code
  • 6. Performance Codes
    • Identify a performance feature rather than specific construction elements
    • Fire resistance in hours
    • Load bearing ability in pounds per ft ²
  • 7. Performance Code
    • “Vertical exit enclosures four stories or more shall be 2-hour fire-resistance rated.”
      • 2006 International Building Code
    • Performance Code  Performance Based Design
  • 8. “Fire Resistance Rating of One Hour”
    • One hour of what?
  • 9. Tests for Fire Endurance of Building Materials
    • Based on tests developed in early 1900s
    • Standard Time-Temperature Curve
    • ASTM E119
    • UL 263
    • NFPA 251
  • 10. Standard Time-Temperature Curve
    • Reproducible test fire
    • Under laboratory conditions
    • By ASTM in 1918
    • Based on fire tests in “Ordinary construction”
    • 8,000 BTUs/lb
  • 11. Tests of a Rated Assembly
    • Specified in specific standards and include
    • Ability to support a specified load
    • Limit heat transfer
    • Prevent passage of heat
    • Withstand hose stream test
  • 12. Fire Walls versus Fire Barriers
    • Fire walls
    • Separate buildings
    • Designed to withstand collapse of structures on either side during fire conditions
  • 13.  
  • 14. Fire Walls versus Fire Barriers
    • Fire barriers or fire separation walls
    • Separate fire areas
    • Rated assemblies constructed within the building
    • Extend from floor to floor above or to the roof
  • 15. Opening Protectives
    • Fire doors
    • Fire windows
    • Fire shutters
    • Rated glazing
    • Fire dampers
    • Through penetration firestop
  • 16. Structural Ratings
    • Provided by encasement
    • Concrete or masonry
    • Gypsum
    • Approved spray on material
    • Asbestos was widely used
    • Impact protection must be provided
  • 17. Fire Blocking
    • Method of controlling fire spread through small concealed spaces
    • Formerly called “fire stopping”
    • Not a rated assembly
    • Fire blocking requirements are prescriptive not performance requirements
  • 18. Draft Stopping
    • Method of controlling fire spread through large concealed spaces in combustible construction
    • Attics, floor, ceilings
    • Not a rated assembly
    • Draft stopping requirements are prescriptive not performance requirements
  • 19. Draft Stopping
    • Typically, 3,000 ft ² for attics in apartments
    • Attics must have access for maintenance and inspection
    • Openings in draft stops self closing and latching
    • Often damaged by tradesmen
  • 20. Summary
    • Building code requirements are generally performance versus specification
    • Specify ratings in hours for structural elements
    • Assemblies are tested in accordance with the STTC tests
    • Approved assemblies are listed