Chapter 7 - Firestop System

Question 1

Which one of the following non-mechanical firestop materials used for packing and forming has a higher temperature capability?

a. Fiber glass
b. Mineral wool

Answer 1

b. Mineral wool

p 7-31

• Mineral wool has high-temperature capabilities (e.g., up to 1093 °C [2000 °F]).
• Glass fiber melts around 649 °C (1200 °F)

Note, ceramic fiber has the highest temperature capabilities (e.g., up to 1260 °C [2300 °F])

Question 2

Firestop systems that have steel conduits as penetrating items generally attain _____ “T” ratings than those using plastic conduits.

a. Higher
b. Lower

Answer 2

b. Lower

p 7-16

Most plastic conduits or innerducts have no trouble attaining higher T ratings (e.g., equal to the F rating) due to their nonconductive nature, while steel conduits and copper conductor cables may have weaker T ratings since metals are conductive.

Question 3

In the United States, the ASTM E2307 firestop standards are used to evaluate:

a. Through-penetration firestop systems
b. Floors, walls, beams, and other structural elements
c. Expansion and control joints
d. Curtain wall safing gaps

Answer 3

d. Curtain wall safing gaps

p 7-109 see Table 7.11

Note, ASTM starts at E119 then E814, E1966, and E2307

Question 4

In the United States, the UL 263 firestop standards are used to evaluate:

a. Through-penetration firestop systems
b. Floors, walls, beams, and other structural elements
c. Expansion and control joints
d. Curtain wall safing gaps

Answer 4

b. Floors, walls, beams, and other structural elements

p 7-109 see Table 7.11

Note, UL starts at UL263 then UL1479, & UL 2079. No UL for Curtain wall safing gaps

Question 5

When planning the installation of electrical apparatus on a fire-rated framed wall assembly, individual penetrations should not exceed ___ in surface area of one face of a stud wall.

a. 15,000 mm2 (23 in2)
b. 11,613 mm2 (18 in2)
c. 10,000 mm2 (16 in2)
d. 7,742 mm2 (12 in2)

Answer 5

c. 10,000 mm2 (16 in2)

p 7-40

• Individual penetrations exceeding ≈10,000 mm2 (16 in2 or a 4x4 box) in surface area of one face of a stud wall.
• Multiple penetrations exceeding ≈65,000 mm2 (100 in2) of total surface area per ≈9.3 m2 (100 ft2) of wall area.

Question 6

Electrical boxes that do not exceed 16 in2 in surface area but create membrane penetrations in a stud wall should be separated on opposite faces of walls by a horizontal distance of at least ___ ft.

a. 1
b. 2
c. 4
d. 6

Answer 6

b. 2

p 7-41

Separated on opposite faces of walls by a horizontal distance of at least ≈0.6 m (2 ft).

Plaster-patched tightly to the adjacent board (e.g., if the gap between the box and board does not exceed ≈3.2 mm [1/8 in]).

Question 7

In firestopping, the term ___ refers to an arrangement of specific firestop materials in a specific configuration.

a. Assembly
b. System
c. Protection
d. Cluster

Answer 7

b. System

p 7-1

The terms system and design are also nearly synonymous; both refer to an arrangement of specific firestop materials in a specific configuration. The term system is used in this context throughout chapter 7.

Question 8

Which of the firestop system term is not synonymous to the others.

a. Approved
b. Listed
c. Qualified
d. Tested
e. Verified
f. Classified

Answer 8

e. Verified

p 7-1

When referring to firestop systems, the following terms are essentially synonymous:
• Qualified
• Tested
• Listed
• Classified
• Approved

Question 9

In Canadian firestop standards, a hose stream test must be passed by a through-penetration firestop system in order to obtain an _____ rating.

a. F or FT
b. FH or FT
c. FH or FTH
d. FT or FTH

Answer 9

c. FH or FTH

p 7-13

See Table 7.3 Rating classifications, standards, and definitions

Question 10

In United States firestop standards, a firestop system is subjected to a ___ test as part of the establishment of the fire rating.

a. Hose stream
b. Temperature rise
c. Smoke leakage
d. Water leakage

Answer 10

a. Hose stream

p 7-14

The hose stream test is required by U.S. referenced standards and is optional in many other standards used abroad.

It is run within 10 minutes of removing the assembly from the furnace fire. A stream of water is discharged from a nominal ≈64 mm (2.50 in) diameter hose fitted with an ≈29 mm (1.125 in) nozzle from a distance of ≈6.1 m (20 ft) from the assembly.

Question 11

Some firestop materials are available in a cementitious form. These materials are _____ adaptable to large openings than putty or caulk.

a. Less
b. More

Answer 11

b. More

p 7-28

Some firestop materials are available in a cementitious form. These materials are:
• A dry powder.
• Pre-mixed or mixed with water.
• More adaptable to large openings than putty or caulk

Question 12

Backer rods are inserted into the opening to the proper depth and compressed a minimum 25 percent thickness.

a. True
b. False

Answer 12

a. True

p 7-31

Question 13

When planning for the installation of electrical apparatus on a fire-rated framed wall assembly, multiple penetrations should not exceed ______ of total surface area per 9.3 m2 (100 ft 2) of wall area.

a. 65,000 mm2 (100 in2)
b. 50,000 mm2 (75 in2)
c. 31,000 mm2 (48 in2)
d. 10,000 mm2 (16 in2)

Answer 13

a. 65,000 mm2 (100 in2)

p 7-41

Multiple penetrations exceeding ≈65,000 mm2 (100 in2) of total surface area per ≈9.3 m2 (100 ft2) of wall area.

Question 14

In fire protection, _____ is a vital part of any fully implemented compartmentation system.

a. Suppression
b. Detection
c. Containment
d. Firestop

Answer 14

d. Firestop

p 7-4

Firestop is a vital part of any fully implemented compartmentation system. Firestop applications are:
• Through-penetration firestop systems.
• Membrane-penetration firestop systems.
• Joint firestop systems.
• Perimeter fire barrier systems.

Question 15

Elements (e.g., pipes, ducts, cables, cable trays) contained in vertical shafts do not need to be firestopped within the shafts at the floor/ceiling assemblies

a. True
b. False

Answer 15

a. True

p 7-48

Question 16

The F rating for a framed wall/stud wall is _____ hour(s).

a. One
b. Two
c. Three
d. Four

Answer 16

b. Two

p 7-18

Construction that is representative of the barrier into which the firestop system is installed (e.g., two-hour rated framed wall construction, three-hour rated poured concrete construction).

Question 17

A _____ eliminates the need to remove or install materials.

a. Cast-in-place device
b. Cable transit system
c. Fire-rated pathway device
d. Factory fabricated sleeve system

Answer 17

c. Fire-rated pathway device

p 7-24

Fire-rated pathway devices are modular devices that integrate a built-in firestop system, which eliminates the need to remove or install firestop materials.

Question 18

A fire _____ is a contained area that is completely enclosed by fire resistant walls, floors, and ceilings.

a. Rated system
b. Stop system
c. Wall
d. Zone

Answer 18

d. Zone

A contained area completely enclosed by fire-resistant rated walls, floors, and ceilings.

Question 19

You are designing a cabling system for a chemical plant. What type of device is needed to prevent the spread of fire along the cable other than the barrier penetrations?

a. Fire break
b. Fire shield
c. Fire stop
d. Fire wall

Answer 19

a. Fire break

p G-79

A fire-rated material, device, or assembly of parts installed along a cable or within a cable pathway, other than at a cable penetration of a fire-rated barrier, to prevent the propagation of fire along a cable.