Ch. 7 Wood Frame Construction Flashcards
A ________ is supported by the frame and has curtain walls
Framed building
the load of the entire structure is carried on the walls
Wall bearing
Lumber with tongue and grooves at the ends
End matched lumber
Heavy timber is greater than ________ inches wide
8
use of solid wood members instead of lightweight wood trusses
Legacy construction
tongue and grooved lumber
Matched lumber
Board made of layers of strands of wood cut from logs, at a fairly constant width two length ratio
Oriented Strand Board (OSB)
narrow rough strips of wood nailed to studs
Wood lath
Balloon frame buildings have structural ________ from top to bottom
Continuity
A common means of flames spread in balloon frame and platform frame buildings is the ________
Open stairwell
Headers are on the ends and trimmers are along the lengths of ________
Floor openings
A peaked roof is built of rafters and a _____
Ridge board (ridge pole)
_____ give a roof a variety of slopes and shapes
Hips and valleys
Trusses are most often used as _____
Beams
Trussed columns can be seen in high energy transmission lines and _____
radio towers
During a fire, the presence of truss floors may be disclosed by smoke or fire pushing through the wall at the _____
floor line
Wood truss roofs lack a _____ so you can’t hang a roof ladder on a beam, only roof deck sheathing
Ridge pole
Ventilation of a wood truss roof must be performed using an _____
Aerial device (Don’t walk on the roof)
Solid floor joists act as fire stops but _____ do not
Trusses
Voids are almost invariably interconnected horizontally and vertically by _____ pathways
Utility
The flammability range of carbon monoxide is from 12.5% to _____
74%
Newer I shaped wooden beams are 2X4” flanges and _____ for the web
OSB (Oriented strand board)
Often, cut off ends of _____ are used as fire stopping
I-Beams
Wood I joists and _____ are considered to be the most dangerous of all structural members to firefighters.
lightweight wood trusses
_____ is engineered construction in which the roof and floor trusses and studs are tied into a unitized frame
Truss frame
_____ is often required by code to be installed to prevent the spread of fire
Fire stopping
_____ typically limit the vertical movements through relatively small-concealed passages such as under stairs and inside walls.
Fire stops
_____ limit horizontal movements through large concealed passages such as open web floor trusses or attics
Draft stops
_____ fire stopping comes as a result of normal building construction
Inherent
_____ fire stopping is installed to meet the requirements of a code.
Legal
In multiple unit dwellings, the recommended location for fire stopping is along the tenant separations so that the entire floor– ceiling area, above / below the unit on fire, is a _____
Collapse area
Woods can be made fire retardant by impregnation with mineral salts, which _____ its rate of burning.
Slow
_____ can significantly reduce wood’s flame spread
Pressure treatment
Treated wood will burn, but a _____ rate
Slower
_____ coatings swell up when heated
Intumescent
A basic problem with plywood exposed to fire is that it _____ which increases the surface area and the rate of heat release
Delaminates
_____ burn like solid heavy timbers and do not delaminate like plywood
Laminated timbers
_____ is the covering that is applied to the studs or framing of a structure
Sheathing
A common method of ignition of low-density fiberboard is a _____
Plumber’s torch
Wood shakes are larger than wood _____
Shingles
Roofing materials are classified as A, B or C. The least fire resistant is _____ rated
C
