Question 1
Where collar ties are used to connect opposing rafters, they shall not be spaced more than
____ feet on center.
ANSWER
4
(2021 IRC Section R802.4.6)
Question 2
Attic access for buildings with combustible roof construction shall have the rough-framed
opening be not less than _____ inches by _____ inches.
ANSWER
22, 30
(2021 IRC Section R807.1)
Question 3
5/8 inch wood structural panels used as roof sheathing shall be attached using ___ common
nails.
ANSWER
8d
1
,(2021 IRC Table R602.3(1) Item #32)
Question 4
Two-family dwellings provided with an automatic sprinkler system shall have the units
separated by a wall and floor assembly having a fire-resistance rating of not less than
______.
ANSWER
1/2 hour
(2021 IRC Section R302.3 Exception #1)
Question 5
In crawl spaces, wood floor joists shall be either of naturally durable wood or preservative-
treated wood unless located _____ inches or more from the exposed ground.
ANSWER
18
(2021 IRC Section R317.1 #1)
Question 6
True or False. Fireblocking material can consist of one-quarter inch gypsum board.
ANSWER
FALSE
(2021 IRC Section R302.11.1 #5)
2
, Question 7
The ends of floor joists bearing on wood or metal shall not have less than ___ inches
bearing.
ANSWER
1 1/2
(2021 IRC Section R502.6)
Question 8
When wood columns rest directly on concrete exterior foundation walls, they shall be of
pressure-treated wood unless they are located a minimum of ____ inches from the exposed
ground.
ANSWER
8
(2021 IRC Section R317.1 #2)
Question 9
The flame spread index of wall and ceiling finishes shall not be greater than ___ and the
smoke-developed index shall not be greater than ___. Tests conducted shall conform with
ASTM E 84 or UL ___.
ANSWER
200, 450, 723
(2021 IRC Section R302.9.1; R302.9.2; R302.9.3)
3
Where collar ties are used to connect opposing rafters, they shall not be spaced more than
____ feet on center.
ANSWER
4
(2021 IRC Section R802.4.6)
Question 2
Attic access for buildings with combustible roof construction shall have the rough-framed
opening be not less than _____ inches by _____ inches.
ANSWER
22, 30
(2021 IRC Section R807.1)
Question 3
5/8 inch wood structural panels used as roof sheathing shall be attached using ___ common
nails.
ANSWER
8d
1
,(2021 IRC Table R602.3(1) Item #32)
Question 4
Two-family dwellings provided with an automatic sprinkler system shall have the units
separated by a wall and floor assembly having a fire-resistance rating of not less than
______.
ANSWER
1/2 hour
(2021 IRC Section R302.3 Exception #1)
Question 5
In crawl spaces, wood floor joists shall be either of naturally durable wood or preservative-
treated wood unless located _____ inches or more from the exposed ground.
ANSWER
18
(2021 IRC Section R317.1 #1)
Question 6
True or False. Fireblocking material can consist of one-quarter inch gypsum board.
ANSWER
FALSE
(2021 IRC Section R302.11.1 #5)
2
, Question 7
The ends of floor joists bearing on wood or metal shall not have less than ___ inches
bearing.
ANSWER
1 1/2
(2021 IRC Section R502.6)
Question 8
When wood columns rest directly on concrete exterior foundation walls, they shall be of
pressure-treated wood unless they are located a minimum of ____ inches from the exposed
ground.
ANSWER
8
(2021 IRC Section R317.1 #2)
Question 9
The flame spread index of wall and ceiling finishes shall not be greater than ___ and the
smoke-developed index shall not be greater than ___. Tests conducted shall conform with
ASTM E 84 or UL ___.
ANSWER
200, 450, 723
(2021 IRC Section R302.9.1; R302.9.2; R302.9.3)
3
