Chapter 8 Firestop Assemblies

Question 1

Name six firestop parameters for
penetrations in concrete walls.

Answer 1

1. Wall thickness
2. Hourly rating required
3. Opening size
4. Annular space
5. Sleeve systems
6. Material selection
   TDMM: Page 8-35

Question 2

Name four firestop
parameters for penetrations
in framed wall assemblies.

Answer 2

I . Hourly rating
2. Opening size
3. Annular space
4. Sleeve systems
TDMM: Page 8-38

Question 3

What is a preferred solution
for firestopping existing
penetrations?

Answer 3

A split-sleeve system assembly
that can be installed around the
existing cables without
interrupting service
TDMM: Page 8-40

Question 4

Name 4 benefits of a
sleeve system.

Answer 4

1. Ease of installation
2. Supports and protects cables
   being installed
3. Packed with mineral wool or
   ceramic fiber and intumescent
   fill material
4. Re-enterable
   TDMM: Page 8-47

Question 5

What guidelines should be
used to firestop through
penetrations?

Answer 5

Through penetrations should be
firestopped according to the
guidelines for the basic
construction of the two outermost
layers of combination wall.
TDMM: Page 8-43

Question 6

How should load-bearing
stud walls that are part of
combination walls be
firestopped?

Answer 6

By enclosing (boxing) the
penetration in the cavity
TDMM: Page 8-43

Question 7

How should partial
(membrane) penetrations
in a combination wall be
firestopped?

Answer 7

According to the
recommendations for the type
of wall that is being penetrated
TDMM: Page 8-43

Question 8

Who must be consulted
before a rated floor can be
penetrated?

Answer 8

Project structural engineer
TDMM: Page 8-44

Question 9

What method should be
used to firestop acoustic
materials in a ceiling?

Answer 9

Fully surround with mineral wool
or ceramic fiber insulation and
flash or use a permanently
pliable putty or firestop caulk.
TDMM: Page 8-45, Table 8.5

Question 10

What method should be
used to firestop concrete
ceilings?

Answer 10

Use the same method as
specified for concrete floor
systems.
TDMM: Page 8-48

Question 11

Name two reasons why
firefighters vent the roof
during a fire.

Answer 11

1. To prevent the heat buildup
2. To reduce the possibility of
   roof collapse
   TDMM: Page 8-48

Question 12

True or False
Elements contained in
vertical shafts do not need
to be firestopped within the
shafts at the floor/ceiling
assemblies.

Answer 12

True. 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. Any
distribution penetrations, however,
that breech the integrity of the
shaft should be sealed with a
qualified firestop system.
TDMM: Page 8-49

Question 13

What should the installer
do after labeling
each penetration?

Answer 13

Take a photo/video of each
penetration and submit it to the
PM and the AHJ.
TDMM: Page 8-51