Ch 5 Interior Finishes Flashcards
Interior finishes
Materials used for exposed face of the wall and ceiling.
Trim should not exceed what % of wall and ceiling area?
Trim should not exceed 10 % of wall and ceiling area
Flame spread
Movement of flame away from ignition source
Surface burning characteristics
Speed flame with spread over a surface
How can flame spread be predicted
By surface burning characteristics
What’s the most significant factor in fuels burn rate
Combination of fuel and available oxygen
Another factor is manner in which the interior finish is mounted
Building code may require materials with a greater surface burning rate to be installed over what type of material
Noncombustible
Paint and wallpaper should be no thicker than?
Paint and wallpaper should be no thicker than 1/28 inch
When is carpet tested?
When used as interior wall finish
Types of fire retardant coatings
Intumescent coatings
Mastics
Paints
Cement Fibers
Intumescent coatings
Thick puffy coating that expands and insulates
How are fire retardant coatings applied
Specific rate of square feet
Ceiling contribute to void spaces T or F?
True
Degree of fire resist required for walls or partitions depends on what?
Purpose of components
Fire rated floor and ceiling assemblies for Multi story buildings require
Structural fire resistance and prevent verticals spread or fire
Compartments with rated enclosures can be used for ?
Areas of refuge
Fire walls are used for what purpose
Limit fire spread
Freestanding walls are self supporting in regards to what type of loads
Vertical loads
What type of construction are freestanding walls usually found
Type III and Type V
Freestanding walls but be able to resist lateral loads of?
Freestanding walls but be able to resist lateral loads of at least 5 pounds per square foot
Parapet wall height above a combustible roof
Code varies between 18-36 inches
Parapet walls can terminate at the underside of a noncombustible roof provided
Parapet walls can terminate at the underside of a noncombustible roof provided that the roof has a Class B low combustibility covering
Fire walls without parapets that may not be identifiable from the outside generally have what type of rating
2 hr
For a fire wall to be 4 hour rated it must be constructed with what type of material
Masonry or concrete
IBC permits combustible materials to be framed into a masonry or concrete fire wall from opposite sides provided?
4 inch separation between the ends of structural members
In structures as close as 18 inches apart, what may take place if clearance space for exposure protection
Rated construction
Fire walls maybe eliminated if they have
Automatic sprinkles
What’s the purpose of an enclosure wall?
Block verified spread of fire
Enclosure walls are required to have fire resistance rating of 1-2 hours depending on what?
Height of building
Buildings 4 stories or lower require what. Amount of enclosure rating ?
1 hr rating
Buildings 4 stories or higher require what. Amount of enclosure rating
2 hrs fire enclosure
Most common material used in enclosure walls
Gypsum
Curtain walls, not Curtain Boards are
Non-load bearing walls attached to exterior. Like a veneer
What protects opening in fire rated walls?
Fire doors
Fire doors are rated in increments of
20 min to 4 hours
What rated doors are used primarily for smoke barriers and openings to corridors
1/2 hour to 1/3 hour
Class A fire doors used for
Openings in fire walls
Class B fire doors
Vertical shafts and openings in 2hr rated partitions
Class C fire doors
Between rooms and corridors , 1st or less fire rating
Class D fire walls
Exterior openings with severe fire exposure from outside
Class E Fire Doors
Exterior openings with moderate or light fire exposure from outside
To effectively block fire spread, fire door assemblies must have fire resistance similar to what?
Fire rated walls
If a fire wall has a greater than 2 hr rating what type of fire door it required?
3-4 hrs
Fire fighters should do what to a rolling overhead door prior to proceeding through it ?
Attempt to secure and block the channel
Horizontal sliding doors are usually help in place by?
Fusible link
Swinging doors that protect stairwell enclosures and corridors have ratings between
20 min and 3 hours
Which way must swinging doors swing?
Direction of exit travel
When fire doors are installed in a Frame, all parts of frame must withstand fire exposure T or F.
True
Fire doors with what rating can be equipped with fire glazing windows
Doors with upto 3 hr rating can be equipped with glazing.
Fire doors with ratings of 1-3 hours can having glazing upto how many square inches?
Fire doors with ratings of 1-3 hours can having glass panels upto 100 square inches in area per door
Fire doors with ratings of 1/2-1/3 can have glass panels for which they are?
Tested
Louvers
Horizontal slats angled to permit ventilation
Fire door testing is done in accordance with NFPA 252 using what test
ASTM E- 152
What’s the primary concern of testing of fire doors
They must remain in the frame during the flame test
In test sing of fire doors, intermittent flame is permitted after how long?
After the first 30 min of testing
If an opening in a fire walls is no longer needed, what material should be used in wall construction?
Equivalent of the rating of the wall
What’s another criteria for fire door rating regarding hose streams
Fire door must remain in place when subjected to hose stream immediately following fire tests
What rated doors may not be subject to hose tests, depending on intended application?
1/3 hour rating depending on intended application
Markings on fire rated doors include
Door type
Rating in hours
Testing lab info
