Chapter 7

Question 1

Standard tensile strength of wood

Answer 1

considered about 700 PSI

Question 2

Moisture content of structural lumbar

Answer 2

19 percent specific gravity

Question 3

the allow compressive strength parallel to the grain

Answer 3

Varies from 325 to 1,700 PSI

Question 4

Engineered wood advantages are 2

Answer 4

Strength

Cost efficiency

Question 5

Engineered wood disadvantages

Answer 5

Quick and unpredictable failure in fire conditions when unprotected

Question 6

Scarf joint and finger joints are used when

Answer 6

to Transmit tensile stresses

Question 7

Glulam beams are used

Answer 7

frequently in heavy timber construction where greater length components are required

Question 8

PSL standard sizes range from

Answer 8

2 to 8 feet in length

Question 9

PSL is _______ out of the three SCL Products

Answer 9

Strongest

Question 10

LSL is

Answer 10

Typically used for short span beams and columns

Question 11

Thermoplastic lumber is developed

Answer 11

As an alternative to preservative treated lumbers and not intended to be used in the structural framing of a building

Question 12

Flame spread rating of Thermoplastic lumber is

Answer 12

80

Question 13

3 Types of Nonveneered panels

Answer 13

Oriented strand board

Particleboard

Waferboard

Question 14

OSB is Widely used for

Answer 14

Sheathing and subflooring in wood frame buildings

Question 15

SIP’s are

Answer 15

Outer wood panels usually OSB with plastic foam core with the foam core can be up to 1 foot thick

Question 16

4 Materials used for Firestopping

Answer 16

2 inch Nominal lumber

Gypsum board

Cement fiber board

Batts or blankets of mineral wool glass fiber or other approved materials

Question 17

The usual requirements for fire stopping in attic space is

Answer 17

the attic space be subdivided into areas of 3,000 square feet

Question 18

Exterior insulation and Finishing systems (EIFS)

Answer 18

are used to increase the insulative properties of a building

Question 19

Noncombustible materials used for insulation include (3)

Answer 19

Glass wool and rock wool in form of batts or blankets with combustible paper or foil coverings

Fiberglass

Some older vermiculite and batt insulation that by contain asbestos

Question 20

Loose fill materials used for insulation are (3)

Answer 20

Granulated rock wool

Mineral wool and glass wool wither blown into stud spaced on manually packed

Cellulose fiber and shredded wood, treated with water soluble salts to reduce combustibility it it will slowly smolder.

Question 21

Two Types of Solid Fill foam insulations are

Answer 21

Urea formaldehyde foam

Polyurethane foam

Question 22

Brick or stone veneers alone dose not affect _____ but dose add ______

Answer 22

Fire behavior

Insulating value of the wall

Question 23

Brick or stone veneers must be tied in at intervals of

Answer 23

16 inches

Question 24

Materials used as manufactured components are (4)

Answer 24

Adhesives

Dimensional Lumber

Meal Fasteners

Panels

Question 25

Pyrolysis begins

Answer 25

At a temperature somewhere below approximately 392 degrees F

Question 26

The heat of combustion of a fuel is

Answer 26

Total amount of thermal energy that can be release if the fuel is completely burned and is measured in BTU’S

Question 27

Surface to mass ratio of wood has

Answer 27

Great significance in fire fighting

Question 28

Two main types of fire retardant treatments are

Answer 28

Surface coating

Pressure impregnation

Question 29

Pressure impregnation of wood Process 4 steps

Answer 29

1 wood is placed in a large vacuum cylinder

2 the vacuum draws air out of the cells of the wood

3 A solution containing the fire retardant chemical in introduced into the cylinder and the cylinder is pressurized

4 the pressure forces the fire retardant chemicals into the cells of the wood

Question 30

Fire Retardant reduces

Answer 30

Wood Strength so allowable stress must be matched to the values indicated after treatment

Question 31

6 Inorganic or organic salts used for fire retardant treatments are

Answer 31

Ammonium phosphate

Ammonium sulfate

Boric acid

Zinc chloride

Sodium dichromate

Borax

Question 32

Requirements for ignition resistant construction

Answer 32

Fire resistant roof coverings to protect against flaming embers

An exterior wall that is either noncombustible or that has a 1 hour fire resistive rating when exposed from the outside

Limitation on the size of attic and under floor vents and their protection with corrosion resistant screens

Question 33

Platform construction is more prone to shrinkage than balloon framing because

Answer 33

platform framing makes use of more horizontal member in its frame than balloon frame buildings

Question 34

3 Other types of wood construction

Answer 34

Pole construction

Log construction

Prefabricated panel construction

Question 35

The wood shrinkage in platform construction can produce

Answer 35

Greater vertical movement and then intern cause cracking of plaster and misalignment of door and window openings

Question 36

3 Identifiable features of heavy timber framing are

Answer 36

Trusses or beams can be used to support the roof

The exterior walls are non load bearing panels with exterior siding that may include any of seral materials including corrugated sheet metal

Internal support columns are not less then 8x8 and the beams are not less then 6x10 except in roof beams

Question 37

Two primary differences between type 4 and type 3

Answer 37

type 4 heavy timber has thicker dimensions of solid laminated wood structural members

Type 4 heavy timber dose not allow combustible concealed spaces