Chapter 14 Multiple choice Flashcards
What kind of beam is the most common use of glulam members?
Long-span beams
Unprotected glulam members with a large cross section are considered to provide a fire resistance rating of up to:
a. 1/2 h
b. 1 h
c. 2h
b. 1 h
This type of member is generally stronger and stiffer than sawn lumber of the same dimensions. What is it?
Glulam Member
Unbalanced beams can be used only as single-span beams. True or False?
True
Balanced glulam beams are mandated for?
Continuous beams and beams with an overhang
This type of member is produced by gluing together wood veneers that are approximately 1/8 thick, generally used as floor joists and beams, glued with all veneers running in the same direction, and stronger along the grain and weaker across the grain. What is it?
Laminated Veneer Lumber (LVL)
Wood I-joists are made of LVL or solid sawn lumber flanges and webs. True or False?
False
Compared to sawn lumber joists, wood I- joists are:
a. Less expensive
b. Slightly Heavier
c. Dimensionally more stable
C. Dimensionally more stable
What are two characteristics of a truss?
- Greater spanning capability than a sawn lumber beam having the same amount of material
- Individual members joined together to form an array of interconnected triangular frames.
Nail plates, used to join members to a truss, are generally used only on one face of the truss. True or False?
False
Wood trusses are generally spaced at how many inches on center?
24inches on center
Plywood panels are made by gluing under heat and pressure layers of ?
Wood veneers so that the wood grains in adjacent layers are perpendicular to each other
Cross-graining makes a plywood panel:
a. dimensionally more stable
b. less likely to split than solid sawn lumber
c. stronger in the direction of face veneer grains
d. All of the above
D. all of the above
The most commonly used plywood panel (nominal) size is 4ft. X 8ft. True or false?
True
Plywood panels should be placed with their longer dimension running in what direction to rafter or joists?
Plywood panels should be placed with their longer dimension perpendicular to rafter or joists.
With respect to veneer quality, softwood plywood is graded in grades what to what?
A to D
An OSB panel generally has greater shear strength than a plywood panel of the same size and thickness. True and False
True
Grade stamps on engineered wood panels specify:
a. intended use and exposure
b. allowable spans
c. mill number
d. thickness
e. all of these above
e. all of the above.
Exterior siding panels may be made of OSB or plywood. True or False?
True
Several different type of nails are used in wood frame construction. They are typically distinguished from each other by the what two things?
Nail head and Nail shank
The nails most commonly used in wood frame construction are which four?
6d, 8d, 10d, 16d
Nails work best when they are subjected to which?
Shear or Tension?
Shear
Which of the following nailed connections is the strongest?
a. Face nailing
b. Toe nailing
c End nailing
A. face nailing
Nail popping is primarily a problem in floor sheathing and is caused by the shrinkage of floor sheathing? True or False?
False
Joist hangers are steel connectors that connect what to what?
Joist hangers are steel connectors that connect floor joists with a supporting beam
The adhesives used in making engineered wood products contain what?
Formaldehyde
Gaseous emissions produced by engineered wood decrease over time. True of False?
True
