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Flashcards in 7 Wood Construction Deck (82)
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1

Disadvantages to wood as construction material

Never dimensionally true
Weather will change its dimension from uneven shrink or swell
Defects, knots, holes, insects, decay, damage, splits or warping.

2

Wood is stronger in what direction

Parallel to the grain than against it.

3

Allowable tensile strength of wood

700 psi

4

Allowable Compressive strength of wood parallel to grain

325-1700 psi

5

Most structural limber has a moisture content of

19 percent or less

6

Different types of wood products

Solid lumber
Laminated wood members.
Structural composite lumber
Panels
Manufactured components

7

Glulam

Short for glue laminated structural lumber

8

Solid lumber includes

boards, dimensional lumber, and timbers.

9

Lumber boards have a nominal thickness of

2" or less

10

Dimensional lumber has a nominal thickness of

2-4 inches or more

11

Timbers have a nominal thickness of

5 inches or more

12

Laminated beams can have individual lamination layers of what size

3/4 to 2". Because dimensions can be made not available in solid pieces from logs

13

Laminated members can be produced in depths of

3-75 inches

14

Three types of joints for laminated members

Scarf
Butt
Finger

15

But Joint is easy to produce but cannot be used when

Tensile forces are to b transmitted along the length of beam

16

Scar and finger joints can be used to transmit what type of force

Tensile

17

Veneer

Surface of attractive material laid over base of common material

18

Structural composite lumber SCL is composed of what types

Laminated veneer lumber LVL
parallel strand lumber. PSL
Laminated strand lumber LSL

19

Levels are used in applications for I joists and beams of what's size

1.75 to 3.5 inches thick

20

Parallel strand lumber is the strongest of the three types of SCL and can be used for

Heavily loaded columns and long spans.

21

Laminated strand lumber LSL is used for

Short span beams and columns

22

Wood panels include

Plywood
Nonveneered panels
Sandwich or composite panels

23

Plywood panels have the grain oriented in the direction of the longest section with grain oriented how for the internal layers

At right angles to each other

24

Plywood in produced in standard sheets measuring

4x8 feet

25

Composite panels or sandwich panels

Produces with parallel external face veneers bonded to a core of reconstituted fibers. Example is structural insulated panel

26

Particle board can be in sizes up to

8x40 ft

27

Wafer board is similar to particle board but uses larger pieces of wood, largely been replaced by

Osb

28

Span rating indicates intended structural application a rating of 32/16 indicates

Use for sheeting over rafters 32 inch apart and subflooring over joists 16 inches apart.

29

Lumber

Lengths of wood cut and prepared for use in construction

30

Gusset plates

Metal or wooden plates used to connect and strengthen the intersections of metal or wood truss components