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21 Cards in this Set
- Front
- Back
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The strength of wood varies significantly with ______, ______ and direction of load with respect to grain. The allowable compressive strength parallel to the grain varies from ______ to _____ psi pg 198
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species, grade
325 to 1700 |
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Three types of non veneered wood are pg 202
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Oriented strand board OSB
particle board waferboard |
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Ignition temperature of wood is affected by the following variables page 207
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Density of the wood
size and form of the wood moisture content rate of heating nature of the heating source air supply |
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Thermoplastic composite lumber is a combustible product with the flame spread rating of _____. Firefighters need to be aware that decks constructed of thermoplastic composite lumber may look at first glance like would but under fire conditions they will melt like ______. These types of decks also burn very ______ and ______, unlike would. Page 212
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80
plastic very black and sooty |
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In some facilities such as schools and correctional facilities ______ gypsum board may be used. It is produced with ______ mesh to resist impact.
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impact-resistant
fiberglass |
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Requirements for ignition resistant construction include page 226
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Fire resistant roof coverings
Exterior wall that is either noncombustible or that has a 1 hour fire resistive writing when exposed from the outside. Limitations on the size of a attic and under floor events in their protection with corrosion resistant screens |
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Page 198. Wood is stronger in what direction of the grain
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Stronger parallel to grain then against the grain
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Page 198. Allowable tensile strength of wood is
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About 700 psi
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Page 198
Five types of specific forms of wood products for construction |
Solid lumber
laminated wood members structural composite lumber panels manufactured components |
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pg 199
Solid lumber includes |
boards (nominal of 2" or <)
Dimension lumber (2"-4" or >) Timbers (nominal of 5" or >) Dimensional lumber available in 8 -18 feet in 2" increments Rafters can be up to 24' |
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What are produced by joining flat strips of wood with glue?
Beams produced are called _____ Thickness of individual lamination varies from ______ to _____. Depths can be ______ to _____ lengths up to _____. |
Laminated wood members
glulan beams 3/4" - 2" 3"-75" 100" |
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What are three types of joints that can join laminated members end to end?
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scarf joint
butt joint finger joint |
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pg 201
Structural composite lumber products allow the use of the outer fibers of a log as well as the inner portions traditionally used. These products include the following |
Laminated veneer lumber
parallel strand lumber laminated strand lumber |
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Page 201 panels include what three products
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Plywood
nonveneered panels (OSB particleboard waferboard) sandwhich/ composite panels (inner core can be up to one foot thick) |
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Page 204
3 types of trusses |
Light frame
heavy timber (made up of members up to 8 or 10") split ring ( makes use of a short circular piece of steel within and between two adjacent one members to transfer the load between members) |
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pg 209
Heat of combustion: severity of a fire is not determined only by the total amount of ______ available. The rate at which a fuel is ______ and therefore the rate at which energy is released determines fire ______ rate and ______ |
fuel
consumed growth severity |
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pg 206
One serious and fundamental drawback to wood as a building material is its ______ |
Combustibility
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pg 206
The relative hazard posed by a combustible material such as wood is a function of several variables including |
Ignition temperature
heat of combustion ratio of the surface area to mass |
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Two main methods of fire retardant treatment are
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Surface coating which is used primarily to reduce the surface burning of wood ie, the flame spread rating.
Pressure impregnation which is performed by placing the wood to be treated in a large cylinder in which a vacuum is created. The vacuum draws air out of the cells of the wood. A solution containing the fire retardant chemical is introduced into the cylinder in the cylinder is pressurized. The fire retardant treatment of wood will reduce its strength |
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Page 220
Exterior wall materials include |
Sheathing
Building paper insulation siding |
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Page 202
What is a type of composite panel? |
(SIP) structural insulated panel
usually expanded polystyrene used for energy efficiency. |
