Wood
As the tree grows outward from the pith (center), the inner cells become inactive and turn into ________________.
heartwood
What type of lumber is sawed at right angles to the annual rings?
Quarter Sawn Lumber
What is the most common size of a Structural panel (dimensions of 1 sheet of plywood) & What is the area of that one sheet?
4' x 8' and 32 Square Feet
_______________ is a force tending to decrease length.
Compression
What does "PSL" stand for when referring to specific type of Engineered beam and what is its commonly known brand name?
Parallel Strand Lumber, Paralam.
How is the age of a tree indicated?
The number of annual rings.
A artificially heated drying place for lumber is called what?
a Kiln
Wood veneer is used in the construction of what type of panels?
Plywood
Laminated veneer lumber is intended for use as high-strength, load-carrying beams to support the weight of construction over ___________________, and in floor and roof systems.
window and door openings
The most expensive way to dry lumber is by ____.
Kiln-Drying
Hardwood comes from ____________ trees that shed their leaves each year.
Deciduous
What's the difference between the nominal size & the actual size of lumber? what is this a result of?
The Nominal size is what the lumber is manufactured as then overtime with it drying more it shrinks results it having a smaller actual size often approximately 1/2" less than its true size.
What does "OSB" stand for?
Oriented Strand Board
The middle portion of an I-joist between the top & bottom flanges are known as the "____________".
(This is usually made of an OSB material)
Web
What is the Actual size of a 2"x 8"
1 1/2" x 7 1/2"
It is important to understand the ______________ of various types of wood when making your choice for your projects.
Characteristics
Crooks, bows, cups, and twists are all types of ______.
Warps
What is the most extensively used engineered panel?
Plywood
What is the short name commonly used to refer to Glue-Laminated beams?
Glulam
The flanges of I- joists are made of specially selected solid lumber- in some cases,
_________________ - for longer lengths of top and bottom flanges.
finger jointed lumber
What type of wood is extremely rot resistant & repels moths?
Cedar
Wood will not decay unless its moisture content is in excess of its average ____.
19%
If 1 sheet of plywood covers 32 Square feet how many sheets of plywood is needed to cover a floor that is 52' long by 80' wide?
52x80= 4160
4160/32= 130 Sheets
Glulam's are manufactured in 3 grades for appearance. What are they & is there a difference in their strengths?
Industrial grade, commercial grade, & quality grade. No difference in strength exists among the different appearance grades.
Express 166" in feet & Inches
166/12 = 13.833333
13' 0.83333x12= 10"
so 166" = 13' 10"