Bcn1210 Test 3 Review - Wood – Ch 14

Front 1

What are the two types of manufactured wood products used in construction?

Back 1

1. engineered wood products
2. industrial wood products

Front 2

____ are those that are engineered for structural applications.

Back 2

Engineered wood products

Front 3

List some examples of engineered wood products.

Back 3

1. glue laminated wood (GLULAM)
2. structural composite lumber
3. wood I-joists
4. plywood
5. oriented strandboard (OSB(
6. wood trusses

Front 4

What is used as a replacement for solid lumber (smooth surface that allows precise machining to form a complex and intricate moldings)?

Back 4

Medium-density fiberboard (MDF)

Front 5

____ aka hardboard is commonly used as floor underlayment.

Back 5

High-density fiberboard (HDF)

Front 6

Sawn lumber has several limitations where large ____ are required to span long distances between structural supports.

Back 6

cross sectional wood members

Front 7

The problems with large sawn lumber cross sections which can only be obtained from trees with large girths (generally protected from harvesting) are ____.

Back 7

1. uneconomical
2. little control over structural properties (cannot be dried to acceptable MC)

Front 8

___ is the solution to the limitations of sawn lumber.

Back 8

GLULAM

Front 9

A glulam beam is typically made by gluing together ____ thick laminations of sawn lumber.

Back 9

1 ½ -in

Front 10

Large cross sections of glulam members are made by gluing laminations ____ and ____.

Back 10

Side-by-side and face-to-face

Front 11

____ glulam beams are symmetrical in lumber quality above and below the beam’s mid-depth.

Back 11

Balanced

Front 12

Tension makes wood ____ than compression.

Back 12

Weaker

Front 13

State whether a single span beam, continuous beam, and cantilevered beam use a balanced or unbalanced beams.

Back 13

Single beam – balance or unbalanced beam
Continuous beam – only balanced
Cantilevered beam – only balanced

Front 14

The appearance of a glulam member is classified into one of the following 4 grades:

Back 14

1. framing appearance grade
2. industrial appearance grade
3. architectural grade
4. premium appearance grade

Front 15

____ is the lowest appearance in grade in which the glue smears and squeeze-outs, knots, and splits are acceptable.

Back 15

Framing Appearance Grade
*should not be exposed to view

Front 16

____ is commonly specified in situations where the appearance of the member is relatively unimportant, such as a warehouse, or if the member is to be covered with a finish material.

Back 16

Industrial Appearance Grade
*industrial grade glulam beams called headers

Front 17

____ is an appearance grade that is intermediate between those of industrial and premium grades.

Back 17

Architectural Appearance Grade

Front 18

____ is a grade commonly specified where the appearance of the beam is important.

Back 18

Premium Appearance Grade

Front 19

____ is produced by gluing together dried wood veneers that are approximately 1/8 –in thick.

Back 19

Laminated veneer lumber (LVL)

Front 20

The wood grain in all veneers runs ____, unlike the grain in plywood, where the veneers are ____ between laminations.

Back 20

In the same direction; cross-grained

Front 21

Like sawn lumber, LVL is ____ along the grain and ____ across the grain.

Back 21

Stronger along; weaker across

Front 22

A variation of LVL is called ____.

Back 22

Parallel Strand Lumber (PSL)

Front 23

___ is made by gluing together narrow strands of veneer in place of wide veneers.

Back 23

Parallel Strand Lumber (PSL)

Front 24

LVL and PSL together are referred to as ____.

Back 24

Structural composite lumber (SCL)

Front 25

____ are made by gluing wood flanges to a wood web.

Back 25

Wood I-joists

Front 26

The flanges of I-joists are made of either ____ or ____.

Back 26

Sawn lumber or LVL

Front 27

The web in I-joists is either of ____ or ____ panel.

Back 27

Plywood or oriented strandboard (OSB)

Front 28

I-joist flanges must be ____, but ____ are permissible in the web, as butt joints or scarf joints.

Back 28

Jointless, joints

Front 29

I-joists are commonly used as ____ and ____.

Back 29

Floor joists and roof rafters

Front 30

A disadvantage of I-joists is their ____, which makes them relatively unstable.

Back 30

Thin webs

Front 31

A ____ consists of individual members that are joined together to form an array of interconnected triangular frames.

Back 31

Truss

Front 32

The ____ and ____ of a truss are limited by manufacturing and transportation capabilities.

Back 32

Size and shape

Front 33

Depending on its overall shape, a wood truss is one of the following:

Back 33

Roof or floor truss

Front 34

Name the commonly used shapes of wood trusses for residential and light commercial structures.

Back 34

1. common
2. dual-pitch
3. scissors
4. mono-slope
5. hip
6. parallel chord (floor)

Front 35

Name the types of wood panels that are used structurally:

Back 35

Floor, roof, and wall sheathing

Front 36

Name the types of wood panels that are used non-structurally:

Back 36

Exterior siding and interior paneling

Front 37

Wood panels are divided into 2 types:

Back 37

1. Veneer panels (consisting of plywood panels)
2. Non-veneered panels (consisting of OSB and particle board panels)

Front 38

____ are made by gluing wood veneers under heat and pressure.

Back 38

Plywood

Front 39

Because wood is stronger along the grain than across the grain, ____ tends to equalize the strengths of a plywood panel in its two principal directions.

Back 39

Cross-graining

Front 40

The panel dimension of ___ is its nominal dimension and the actual dimensions is ____.

Back 40

4’ x 8’ (48”x96”); 47-7/8” x 95-7/8” (which allows 1/8” space for moisture expansion)

Front 41

Plywood panels must be oriented with their long direction ____ to the supporting members.

Back 41

Perpendicular

Front 42

____ are made by gluing several layers of wood strands under heat and pressure.

Back 42

Oriented strandboard panels (OSB)

Front 43

OSB provides higher ____ than plywood because of the absence of core voids.

Back 43

Shear strength (racking resistance)

Front 44

Disadvantages of OSB panels vs plywood:

Back 44

1. OSB are intended only for structural applications (no staining or painting)
2. generally cannot be sanded smooth like plywood panels
3. Prone to edge swelling if they remain wet

Front 45

Because of their ____ and ____, OSB panels are generally used to sheath the entire envelope of a wood frame building.

Back 45

lower cost and greater racking resistance

Front 46

Name types of joints for connecting wood.

Back 46

1. mortise-and-tenon joint
2. housed mortise-and-tenon joint
3. dovetail joint

Front 47

Nails that are heat treated to increase stiffness without any further treatment for corrosion are called:

Back 47

Brite nails

Front 48

In exterior siding/decks where greater corrosion resistance is needed ____ are used.

Back 48

Hot-dip galvanized nails
*stainless steel nails provide higher corrosion resistance but are expensive

Front 49

Nails are distinguished by type of ___ and___.

Back 49

Head and shank

Front 50

The length of common nails in the US is specified by a ___ designation. Common nails are available in lengths ranging from ___ to ___.

Back 50

Penny (d); 2d to 60d

Front 51

Name the commonly used types of nails used in wood frame construction.

Back 51

1. common nail –framing
2. box nail –siding, shingles
3. sinker nail –lays flush
4. duplex nail –temp
5. casing nail –trim, casing
6. finish nail
7. ring shank nail –floor sheathing
8. fluted shank nail –into concrete
9. roofing nail

Front 52

Most commonly used nail sizes in wood frame construction (WFC):

Back 52

6d, 8d, 10d, 16d

Front 53

What is the formula for nail length?

Back 53

Up to 10d nails: nail length= (penny des+2)/4

Front 54

Name the types of nailed connections used in WFC.

Back 54

1. Face nailing
2. end nailing
3. toe nailing

Front 55

LVL is generally used as ____ and ____.

Back 55

Floor joists and rafters