Ch.7 Flashcards
Dimensional lumber is available in lengths from__ to __ feet in 2 foot increments?
8-24 feet
Standard tensile strength of wood is considered to be about _______psi?
700psi
The moisture content of lumber can be controlled to any level , most structural lumber has ___ percent or less?
19%
Mass (weight) of a substance compared to the weight of an equal volume of water at a given temperature?
Specific gravity
Wood is stronger ________ to the grain than against the grain ?
Parallel
Allowable compressive strength parallel to the grain in wood varies from ___ to ___ psi?
325-1700 psi
________________ components are produced from a combination of wood particles and a bonding agent?
Engineered wood
___________ construction is a term coined in the 1950s to refer to milled (light wood) lumber in contrast to heavy timber?
Lightweight
______________ products are made of flat strips of wood joined with glue ?
Laminated wood
This type of joint is easy to produce but cannot be used where tensile stresses will be transmitted along the length of the beam?
Butt joint
Scarf and finger joint beams can have depths ranging from ___ to ___ inches and lengths up to 100foot?
3 to 75 inches
_______ beams are used frequently in heavy timber construction where greater length components are required?
Glulam beams
Connection between two parts made by cutting complementary mating parts , and then securing the joint with glue?
Finger joints
Connection between two parts made by the cutting of overlapping mating parts and securing them by glue or fasteners so that the joint in not enlarged and the patterns are complementary?
Scarf joint
_________________ uses sheets of veneer peeled from the outer portion of a log?
Laminated veneer lumber
______________ is made from veneers that are not as uniform as those used in Laminated veneer lumber?
Parallel strand lumber
Parallel strand lumber can be produced in sizes ranging from __ to __ feet in length?
2-8 feet
______________ is made with long strands of wood up to 12 inches long in length, typically used for short span beams and columns ?
Laminated strand lumber
___________ composite lumber is a wood like product made form wood fiber and polyethylene or polyvinyl chloride?
Thermoplastic
Thermoplastic composite lumber is a combustible product with a flame spread rating of ____?
80
______ panels are made up of several things layers rotary sliced from rotating logs and glued together?
Plywood
Plywood is produced in standard sheets measuring ___ by ___ feet ?
4 feet by 8feet
Synthetic chemical used in the manufacture of plastics and single ply membrane roofs?
Polyvinyl chloride (pvc)
____________ uses long , strand like particles compressed and glued into three to five layers?
Oriented strand board (OSB)
Particleboard panels can be manufactured in sizes up to ___ by ___ feet ?
8 by 40 feet
A composite panel used in structural applications, made of plastic foam between two outer wood panels , often oriented strand board?
Structural insulated panel (SIP)
_____ can be used to increase energy efficiency, the inner core can be up to 1 foot thick for larger R values ?
Structural insulated panels (SIP)
The usual requirement is for attic space to be subdivided into areas of ______ sqft?
3000 sqft
__________ is a layer of material installed outside of the studs to provide structural stability , insulation and an underneath for this siding ?
Sheathing
A layer of _____________ between the sheathing and the siding acts as a vapor barrier?
Building wrap
Exterior cladding or covering system composed of an adhesively or mechanically fasten foam insulation board , reinforcing mesh, a base coat and an outer finish coat, also known as synthetic stucco?
Exterior insulation and finish system (EIFS)
What are the two types of solid fill foam insulations ?
Urea formaldehyde
Polyurethane foam
Asbestos was commonly used in the US from the _____ until the ____?
1930s-1970s
_________ walls with a surface layer of attractive material laid over a base of a common material?
Veneered walls
Veneers must be tied to the wood frame wall at intervals of ___ inches?
16 inches
Building codes may permit the elimination of the structural fire resistance for roof members located more than ___ feet above the floor level?
20 feet
A typical means of adding or increasing fire resistance is through the use of _____ inch gypsum board attached to the studs and ceiling joists?
5/8ths inch
Pyrolysis is the thermal decomposition of wood and begins at a temperature somewhere below approximately ______ degrees ?
392 degrees
The _________________ of a fuel is the total amount of thermal energy that can be released if the fuel is completely burned.
Heat of combustion
When an item is burned throughly , the thermal energy released during the fire can be calculated as the _____ of the item multiplied by the heat of combustion?
Weight
The heat of combustion is used as a baseline for calculating the full_______ of a fire?
Potential
The two main methods of fire retardant treatment are?
Surface coating and pressure impregnation
Fire retardant treatments most commonly used are combinations of ?
Inorganic Or organic salts
Ability of a substance to absorb moisture from the air?
Hygroscopic
The fire resistance of heavy timber columns and beams has been tested with the standard ASTM ?
ASTM E-119
The wood framing systems most frequently encountered can be broadly classified into two basic types?
Light-wood framing
Heavy timber framing
Because of labor costs and limitations in the basic strength of wood , most wood frame buildings do not exceed ___ stories?
3 stories
_____________ framing uses nominal lumber that is 2 inches at its smallest dimensions?
Light wood framing
Horizontal framework member , especially one attached to a beam side that supports the joists , also know as ribbon board?
Ledger board
Also known as western frame construction?
Platform frame construction
Ballon framing has not been widely used since the _____ , although many ballon frame buildings remain today?
1920s
In __________ framing the exterior wall verticals studs are not continuous to the second floor?
Platform framing
Heavy timber framing uses columns not less than __ by __ inches thick?
8 inches by 8inches
Heavy timber beams (except roof beams) are not less than __ by __ inches ?
6inches by 10 inches
_____________ is a form of wood frame construction with columns (posts) and beams that use dimensions smaller than those used in heavy timber framing but greater than those used in light frame construction?
Post and beam framing
Light wood frame trusses use a series of __ inch nominal members that align in the same place?
2 inch
Heavy timber trusses use members up to __ or __ inches , mainly used for their appearance ?
8 or 10 inches
The most common style of connector between heavy timber members are _______ with through bolts ?
Steel gusset plates
Wood is uniquely vulnerable to deterioration from several causes including?
Insects
Decay
Shrinkage
