What are 7 types of hardwood trees?
1. oak
2. walnut
3. birch
4. elm
5. teak
6. mahogany
7. rosewood
What are 3 uses for a PSL or parallam member?
1. post
2. header
3. beam
Which portion of a tree increases as a tree ages?
heartwood
What is an ecological advantage of engineered wood products?
They use small growth trees.
Dimensional lumber lengths range from __ ft to __ ft
8 ft to 28 ft
Timbers are __ " thick or greater
5"
T or F? Air seasoning will not kill the fungus that may be living in the lumber.
True
What are 2 naturally decay-resistant wood species?
1. Cedar
2. Redwood
What are the 2 purposes LVL's are used for and what is the maximum depth of an LVL?
Purposes: Floor joists & rafters
Max depth: 18"
What are 3 common uses of hardwood?
1. flooring
2. cabinets
3. furniture
What are 3 methods to prevent termites?
1. provide distance between the wood and the ground
2. use termite shield
3. use preservative-treated wood
Green lumber has a moisture content of __ % or more
20%+
What does MDF stand for?
medium-density fiberboard
Wood trusses would be graded using which method?
machine stress-related
What are 2 types of organisms that cause biodeterioration?
1. fungus
2. termites
Where do growth rings on trees occur?
In the cambium layer
What does LVL stand for?
Laminated Veneer Lumber
Which 2 types of materials are used for webs of I-joists?
1. plywood
2. OSB
Which defect is a separation of wood fibers near the face, perpendicular to the growth rings?
check
Which type of plywood would be used for temporary exterior exposure during construction?
Exposure 1
What are nailing plates used for?
Connecting truss members
T or F? Glulam members can only be used for external applications.
False - they can be used for interior and exterior
Which type of nails are used for exterior siding and decks where corrosion resistance is needed?
hot-dipped galvanized
What size lumber members are used to make trusses for light-frame construction?
2 x 4
Which 2 regions produce the majority of softwood lumber?
1. Southern Pine
2. Western Wood
How deep is each layer of a glulam beam?
1 1/2 inches deep
T or F? Hardwood is denser than softwood.
True
Glulams are created with dimensional lumber that has been dried to a moisture content of __ % or less
15%
What are 3 softwood lumber classifications?
1. boards
2. timbers
3. dimensional lumber
The engineered wood product PSL is made up of strips of wood that __ feet long and about __ " wide.
8 feet long, 1/2 inch wide
What are 3 types of nailed connections?
1. face nailed
2. end nailed
3. toe nailed
Where is bound water found in trees?
in the cell walls
Roof trusses are typically spaced at __ " on center.
24"
What are the 3 grades of light-framing dimensional lumber?
1. construction
2. standard
3. utility
Which type of nail would be used for wood siding?
box nail
How does shrinkage of lumber occur?
Tangentially (ACROSS the grain, NOT along the grain)
What is a disadvantage of OSB?
It cannot be treated with preservatives
What is the typical size of plywood panels?
4' x 8'
Which defect is a separation of fibers along growth rings?
shake
Which grades of plywood are used for cabinetry and funiture?
A & B
What are 5 types of softwood trees?
1. Pine
2. Spruce
3. Cedar
4. Fir
5. Hemlock
What are glulam members used for?
1. beams
2. heavy columns
3. heavy trusses