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Chapter 23 — WOOD

Section 2309

California Building Code (Title 24, Part 2) · 2019 edition · updated 2026-09-12 · California

Italicized text is a California amendment to the model code, as printed in the official publication.

2309.1 Wood Frame Construction Manual.

Structural design in accordance with the AWC WFCM shall be permitted for buildings assigned to Risk Category I or II subject to the limitations of Section 1.1.3 of the AWC WFCM and the load assumptions contained therein. Structural elements beyond these limitations shall be designed in accordance with accepted engineering practice.

2309.1.1 Additional requirements. [DSA-SS, DSA-SS/ CC, OSHPD 1R, 2 & 5] The use of the AWC WFCM is permitted provided the design and construction also com- ply with Sections 2304, 2305, and 2302.1, Item 1 or 2, and engineering analysis is furnished demonstrating compli- ance.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.1(1)

CEILING JOIST SPANS FOR COMMON LUMBER SPECIES (Uninhabitable attics without storage, live load = 10 psf, L/∆ = 240)

CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE DEAD LOAD = 5 psf
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE Maximum ceiling joist spans Maximum ceiling joist spans Maximum ceiling joist spans Maximum ceiling joist spans
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
12 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 13-2
12-8
12-5
10-10
12-5
12-2
11-7
10-10
12-11
12-5
11-10
10-1
12-2
11-10
11-10
10-10		 20-8
19-11
19-6
15-10
19-6
19-1
18-2
15-10
20-3
19-6
18-8
14-11
19-1
18-8
18-8
15-10		 Note a
Note a
25-8
20-1
25-8
25-2
24-0
20-1
Note a
25-8
24-7
18-9
25-2
24-7
24-7
20-1		 Note a
Note a
Note a
24-6
Note a
Note a
Note a
24-6
Note a
Note a
Note a
22-9
Note a
Note a
Note a
24-6
16 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 11-11
11-6
11-3
9-5
11-3
11-0
10-6
9-5
11-9
11-3
10-9
8-9
11-0
10-9
10-9
9-5		 18-9
18-1
17-8
13-9
17-8
17-4
16-6
13-9
18-5
17-8
16-11
12-11
17-4
16-11
16-11
13-9		 24-8
23-10
23-0
17-5
23-4
22-10
21-9
17-5
24-3
23-4
21-7
16-3
22-10
22-4
22-4
17-5		 Note a
Note a
Note a
21-3
Note a
Note a
Note a
21-3
Note a
Note a
25-7
19-9
Note a
Note a
Note a
21-3

(continued)

358 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.1(1)—continued CEILING JOIST SPANS FOR COMMON LUMBER SPECIES (Uninhabitable attics without storage, live load = 10 psf, L/∆ = 240)

CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE DEAD LOAD = 5 psf
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE Maximum ceiling joist spans Maximum ceiling joist spans Maximum ceiling joist spans Maximum ceiling joist spans
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
19.2 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 11-3
10-10
10-7
8-7
10-7
10-4
9-11
8-7
11-0
10-7
10-2
8-0
10-4
10-2
10-2
8-7		 17-8
17-0
16-7
12-6
16-8
16-4
15-7
12-6
17-4
16-8
15-7
11-9
16-4
15-11
15-11
12-6		 23-3
22-5
21-0
15-10
21-11
21-6
20-6
15-10
22-10
22-0
19-8
14-10
21-6
21-0
21-0
15-10		 Note a
Note a
25-8
19-5
Note a
Note a
25-3
19-5
Note a
Note a
23-5
18-0
Note a
25-8
25-8
19-5
24 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 10-5
10-0
9-10
7-8
9-10
9-8
9-2
7-8
10-3
9-10
9-3
7-2
9-8
9-5
9-5
7-8		 16-4
15-9
14-10
11-2
15-6
15-2
14-5
11-2
16-1
15-6
13-11
10-6
15-2
14-9
14-9
11-2		 21-7
20-1
18-9
14-2
20-5
19-7
18-6
14-2
21-2
20-5
17-7
13-3
19-11
18-9
18-9
14-2		 Note a
24-6
22-11
17-4
Note a
23-11
22-7
17-4
Note a
24-0
20-11
16-1
25-5
22-11
22-11
17-4

Check sources for availability of lumber in lengths greater than 20 feet.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. Span exceeds 26 feet in length.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.1(2)

CEILING JOIST SPANS FOR COMMON LUMBER SPECIES (Uninhabitable attics with limited storage, live load = 20 psf, L/∆ = 240)

CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE Maximum ceiling joist spans Maximum ceiling joist spans Maximum ceiling joist spans Maximum ceiling joist spans
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
12 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 10-5
10-0
9-10
7-8
9-10
9-8
9-2
7-8
10-3
9-10
9-3
7-2
9-8
9-5
9-5
7-8		 16-4
15-9
14-10
11-2
15-6
15-2
14-5
11-2
16-1
15-6
13-11
10-6
15-2
14-9
14-9
11-2		 21-7
20-1
18-9
14-2
20-5
19-7
18-6
14-2
21-2
20-5
17-7
13-3
19-11
18-9
18-9
14-2		 Note a
24-6
22-11
17-4
Note a
23-11
22-7
17-4
Note a
24-0
20-11
16-1
25-5
22-11
22-11
17-4
16 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 9-6
9-1
8-9
6-8
8-11
8-9
8-4
6-8
9-4
8-11
8-0
6-2
8-9
8-7
8-7
6-8		 14-11
13-9
12-10
9-8
14-1
13-5
12-8
9-8
14-7
14-0
12-0
9-2
13-9
12-10
12-10
9-8		 19-7
17-5
16-3
12-4
18-6
16-10
16-0
12-4
19-3
17-9
15-3
11-6
18-1
16-3
16-3
12-4		 25-0
21-3
19-10
15-0
23-8
20-8
19-7
15-0
24-7
20-9
18-1
14-0
23-1
19-10
19-10
15-0

(continued)

360 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.1(2)—continued CEILING JOIST SPANS FOR COMMON LUMBER SPECIES (Uninhabitable attics with limited storage, live load = 20 psf, L/∆ = 240)

CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE Maximum ceiling joist spans Maximum ceiling joist spans Maximum ceiling joist spans Maximum ceiling joist spans
CEILING JOIST
SPACING (inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
19.2 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 8-11
8-7
8-0
6-1
8-5
8-3
7-10
6-1
8-9
8-5
7-4
5-8
8-3
8-0
8-0
6-1		 14-0
12-6
11-9
8-10
13-3
12-3
11-7
8-10
13-9
12-9
11-0
8-4
12-11
11-9
11-9
8-10		 18-5
15-10
14-10
11-3
17-5
15-6
14-8
11-3
18-2
16-2
13-11
10-6
17-1
14-10
14-10
11-3		 23-4
19-5
18-2
13-8
22-3
18-11
17-10
13-8
23-1
18-11
16-6
12-9
21-8
18-2
18-2
13-8
24 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 8-3
7-8
7-2
5-5
7-10
7-6
7-1
5-5
8-1
7-8
6-7
5-1
7-8
7-2
7-2
5-5		 13-0
11-2
10-6
7-11
12-3
10-11
10-4
7-11
12-9
11-5
9-10
7-5
12-0
10-6
10-6
7-11		 17-1
14-2
13-3
10-0
16-2
13-10
13-1
10-0
16-10
14-6
12-6
9-5
15-10
13-3
13-3
10-0		 20-11
17-4
16-3
12-3
20-6
16-11
16-0
12-3
21-6
16-11
14-9
11-5
19-5
16-3
16-3
12-3

Check sources for availability of lumber in lengths greater than 20 feet.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. Span exceeds 26 feet in length.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
12 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 11-6
11-1
10-10
8-7
10-10
10 -7
10-1
8-7
11-3
10-10
10-4
8-0
10-7
10-4
10-4
8-7		 18-0
17-4
16-7
12-6
17-0
16-8
15-11
12-6
17-8
17-0
15-7
11-9
16-8
16-3
16-3
12-6		 23-9
22-5
21-0
15-10
22-5
21-10
20-8
15-10
23-4
22-5
19-8
14-10
21-11
21-0
21-0
15-10		 Note b
Note b
25-8
19-5
Note b
Note b
25-3
19-5
Note b
26-0
23-5
18-0
Note b
25-8
25-8
19-5		 Note b
Note b
Note b
22-6
Note b
Note b
Note b
22-6
Note b
26-0
26-0
21-4
Note b
Note b
Note b
22-6		 11-6
10-6
9-10
7-5
10-10
10-3
9-8
7-5
11-3
10-6
9-0
6-11
10-7
9-10
9-10
7-5		 18-0
15-4
14-4
10-10
17-0
14-11
14-2
10-10
17-8
15-8
13-6
10-2
16-8
14-4
14-4
10-10		 23-5
19-5
18-2
13-9
22-5
18-11
17-11
13-9
23-4
19-10
17-1
12-10
21-9
18-2
18-2
13-9		 Note b
23-9
22-3
16-9
Note b
23-2
21-11
16-9
Note b
23-2
20-3
15-7
Note b
22-3
22-3
16-9		 Note b
Note b
25-9
19-6
Note b
Note b
25-5
19-6
Note b
Note b
23-10
18-6
Note b
25-9
25-9
19-6
16 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 10-5
10-0
9-10
7-5
9-10
9-8
9-2
7-5
10-3
9-10
9-0
6-11
9-8
9-5
9-5
7-5		 16-4
15-4
14-4
10-10
15-6
14-11
14-2
10-10
16-1
15-6
13-6
10-2
15-2
14-4
14-4
10-10		 21-7
19-5
18-2
13-9
20-5
18-11
17-11
13-9
21-2
19-10
17-1
12-10
19-11
18-2
18-2
13-9		 Note b
23-9
22-3
16-9
Note b
23-2
21-11
16-9
Note b
23-2
20-3
15-7
25-5
22-3
22-3
16-9		 Note b
Note b
25-9
19-6
Note b
Note b
25-5
19-6
Note b
26-0
23-10
18-6
Note b
25-9
25-9
19-6		 10-5
9-1
8-6
6-5
9-10
8-10
8-5
6-5
10-3
9-1
7-9
6-0
9-8
8-6
8-6
6-5		 16-0
13-3
12-5
9-5
15-6
12-11
12-3
9-5
16-1
13-7
11-8
8-10
14-10
12-5
12-5
9-5		 20-3
16-10
15-9
11-11
19-11
16-5
15-6
11-11
21-2
17-2
14-9
11-2
18-10
15-9
15-9
11-11		 24-9
20-7
19-3
14-6
24-4
20-0
18-11
14-6
25-7
20-1
17-6
13-6
23-0
19-3
19-3
14-6		 Note b
23-10
22-4
16-10
Note b
23-3
22-0
16-10
Note b
23-10
20-8
16-0
Note b
22-4
22-4
16-10
19.2 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 9-10
9-5
8-11
6-9
9-3
9-1
8-8
6-9
9-8
9-3
8-2
6-4
9-1
8-10
8-10
6-9		 15-5
14-0
13-1
9-11
14-7
13-8
12-11
9-11
15-2
14-3
12-3
9-4
14-3
13-1
13-1
9-11		 20-4
17-9
16-7
12-7
19-2
17-4
16-4
12-7
19-11
18-1
15-7
11-9
18-9
16-7
16-7
12-7		 25-11
21-8
20-3
15-4
24-6
21-1
20-0
15-4
25-5
21-2
18-6
14-3
23-11
20-3
20-3
15-4		 Note b
25-2
23-6
17-9
Note b
24-6
23-2
17-9
Note b
25-2
21-9
16-10
Note b
23-6
23-6
17-9		 9-10
8-4
7-9
5-10
9-3
8-1
7-8
5-10
9-8
8-4
7-1
5-6
9-1
7-9
7-9
5-10		 14-7
12-2
11-4
8-7
14-4
11-10
11-2
8-7
15-2
12-4
10-8
8-1
13-7
11-4
11-4
8-7		 18-6
15-4
14-4
10-10
18-2
15-0
14-2
10-10
19-7
15-8
13-6
10-2
17-2
14-4
14-4
10-10		 22-7
18-9
17-7
13-3
22-3
18-4
17-4
13-3
23-4
18-4
16-0
12-4
21-0
17-7
17-7
13-3		 Note b
21-9
20-4
15-5
25-9
21-3
20-1
15-5
Note b
21-9
18-10
14-7
24-4
20-4
20-4
15-5

(continued)

TABLE 2308.7.2(1)

RAFTER SPANS FOR COMMON LUMBER SPECIES (Roof live load = 20 psf, ceiling not attached to rafters, L/∆ = 180)

362 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.2(1)—continued RAFTER SPANS FOR COMMON LUMBER SPECIES (Roof live load = 20 psf, ceiling not attached to rafters, L/∆ = 180)

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
24 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 9-1
8-7
8-0
6-1
8-7
8-4
7-11
6-1
8-11
8-7
7-4
5-8
8-5
8-0
8-0
6-1		 14-4
12-6
11-9
8-10
13-6
12-3
11-7
8-10
14-1
12-9
11-0
8-4
13-3
11-9
11-9
8-10		 18-10
15-10
14-10
11-3
17-10
15-6
14-8
11-3
18-6
16-2
13-11
10-6
17-5
14-10
14-10
11-3		 23-4
19-5
18-2
13-8
22-9
18-11
17-10
13-8
23-8
18-11
16-6
12-9
21-8
18-2
18-2
13-8		 Note b
22-6
21-0
15-11
Note b
21-11
20-9
15-11
Note b
22-6
19-6
15-1
25-2
21-0
21-0
15-11		 8-11
7-5
6-11
5-3
8-7
7-3
6-10
5-3
8-11
7-5
6-4
4-11
8-4
6-11
6-11
5-3		 13-1
10-10
10-2
7-8
12-10
10-7
10-0
7-8
13-10
11-1
9-6
7-3
12-2
10-2
10-2
7-8		 16-7
13-9
12-10
9-9
16-3
13-5
12-8
9-9
17-6
14-0
12-1
9-1
15-4
12-10
12-10
9-9		 20-3
16-9
15-8
11-10
19-10
16-4
15-6
11-10
20-10
16-5
14-4
11-0
18-9
15-8
15-8
11-10		 23-5
19-6
18-3
13-9
23-0
19-0
17-11
13-9
24-8
19-6
16-10
13-1
21-9
18-3
18-3
13-9

Check sources for availability of lumber in lengths greater than 20 feet.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. The tabulated rafter spans assume that ceiling joists are located at the bottom of the attic space or that some other method of resisting the outward push of the

rafters on the bearing walls, such as rafter ties, is provided at that location. Where ceiling joists or rafter ties are located higher in the attic space, the rafter spans shall be multiplied by the following factors:

H /H
C R		 Rafter Span Adjustment Factor
1/3 0.67
1/4 0.76
1/5 0.83
1/6 0.90
1/7.5 or less 1.00
where:

HC = Height of ceiling joists or rafter ties measured vertically above the top of the rafter support walls. HR = Height of roof ridge measured vertically above the top of the rafter support walls. b. Span exceeds 26 feet in length.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
12 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 10-5
10-0
9-10
8-7
9-10
9-8
9-2
8-7
10-3
9-10
9-5
8-0
9-8
9-5
9-5
8-7		 16-4
15-9
15-6
12-6
15-6
15-2
14-5
12-6
16-1
15-6
14-9
11-9
15-2
14-9
14-9
12-6		 21-7
20-10
20-5
15-10
20-5
19-11
19-0
15-10
21-2
20-5
19-6
14-10
19-11
19-6
19-6
15-10		 Note b
Note b
25-8
19-5
Note b
25-5
24-3
19-5
Note b
26-0
23-5
18-0
25-5
24-10
24-10
19-5		 Note b
Note b
Note b
22-6
Note b
Note b
Note b
22-6
Note b
26-0
26-0
21-4
Note b
Note b
Note b
22-6		 10-5
10-0
9-10
7-5
9-10
9-8
9-2
7-5
10-3
9-10
9-0
6-11
9-8
9-5
9-5
7-5		 16-4
15-4
14-4
10-10
15-6
14-11
14-2
10-10
16-1
15-6
13-6
10-2
15-2
14-4
14-4
10-10		 21-7
19-5
18-2
13-9
20-5
18-11
17-11
13-9
21-2
19-10
17-1
12-10
19-11
18-2
18-2
13-9		 Note b
23-9
22-3
16-9
Note b
23-2
21-11
16-9
Note b
23-2
20-3
15-7
25-5
22-3
22-3
16-9		 Note b
Note b
25-9
19-6
Note b
Note b
25-5
19-6
Note b
26-0
23-10
18-6
Note b
25-9
25-9
19-6
16 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 9-6
9-1
8-11
7-5
8-11
8-9
8-4
7-5
9-4
8-11
8-7
6-11
8-9
8-7
8-7
7-5		 14-11
14-4
14-1
10-10
14-1
13-9
13-1
10-10
14-7
14-1
13-5
10-2
13-9
13-5
13-5
10-10		 19-7
18-11
18-2
13-9
18-6
18-1
17-3
13-9
19-3
18-6
17-1
12-10
18-1
17-9
17-9
13-9		 25-0
23-9
22-3
16-9
23-8
23-1
21-11
16-9
24-7
23-2
20-3
15-7
23-1
22-3
22-3
16-9		 Note b
Note b
25-9
19-6
Note b
Note b
25-5
19-6
Note b
26-0
23-10
18-6
Note b
25-9
25-9
19-6		 9-6
9-1
8-6
6-5
8-11
8-9
8-4
6-5
9-4
8-11
7-9
6-0
8-9
8-6
8-6
6-5		 14-11
13-3
12-5
9-5
14-1
12-11
12-3
9-5
14-7
13-7
11-8
8-10
13-9
12-5
12-5
9-5		 19-7
16-10
15-9
11-11
18-6
16-5
15-6
11-11
19-3
17-2
14-9
11-2
18-1
15-9
15-9
11-11		 24-9
20-7
19-3
14-6
23-8
20-0
18-11
14-6
24-7
20-1
17-6
13-6
23-0
19-3
19-3
14-6		 Note b
23-10
22-4
16-10
Note b
23-3
22-0
16-10
Note b
23-10
20-8
16-0
Note b
22-4
22-4
16-10
19.2 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3		 8-11
8-7
8-5
6-9
8-5
8-3
7-10
6-9		 14-0
13-6
13-1
9-11
13-3
12-11
12-4
9-11		 18-5
17-9
16-7
12-7
17-5
17-1
16-3
12-7		 23-7
21-8
20-3
15-4
22-3
21-1
20-0
15-4		 Note b
25-2
23-6
17-9
Note b
24-6
23-2
17-9		 8-11
8-4
7-9
5-10
8-5
8-1
7-8
5-10		 14-0
12-2
11-4
8-7
13-3
11-10
11-2
8-7		 18-5
15-4
14-4
10-10
17-5
15-0
14-2
10-10		 22-7
18-9
17-7
13-3
22-3
18-4
17-4
13-3		 Note b
21-9
20-4
15-5
25-9
21-3
20-1
15-5

(continued)

TABLE 2308.7.2(2)

RAFTER SPANS FOR COMMON LUMBER SPECIES (Roof live load = 20 psf, ceiling attached to rafters, L/∆ = 240)

364 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.2(2)—continued RAFTER SPANS FOR COMMON LUMBER SPECIES (Roof live load = 20 psf, ceiling attached to rafters, L/∆ = 240)

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
19.2 Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 8-9
8-5
8-1
6-4
8-3
8-1
8-1
6-9		 13-9
13-3
12-3
9-4
12-11
12-8
12-8
9-11		 18-2
17-5
15-7
11-9
17-1
16-7
16-7
12-7		 23-1
21-2
18-6
14-3
21-9
20-3
20-3
15-4		 Note b
25-2
21-9
16-10
Note b
23-6
23-6
17-9		 8-9
8-4
7-1
5-6
8-3
7-9
7-9
5-10		 13-9
12-4
10-8
8-1
12-11
11-4
11-4
8-7		 18-2
15-8
13-6
10-2
17-1
14-4
14-4
10-10		 23-1
18-4
16-0
12-4
21-0
17-7
17-7
13-3		 Note b
21-9
18-10
14-7
24-4
20-4
20-4
15-5
24 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 8-3
8-0
7-10
6-1
7-10
7-8
7-3
6-1
8-1
7-10
7-4
5-8
7-8
7-6
7-6
6-1		 13-0
12-6
11-9
8-10
12-3
12-0
11-5
8-10
12-9
12-3
11-0
8-4
12-0
11-9
11-9
8-10		 17-2
15-10
14-10
11-3
16-2
15-6
14-8
11-3
16-10
16-2
13-11
10-6
15-10
14-10
14-10
11-3		 21-10
19-5
18-2
13-8
20-8
18-11
17-10
13-8
21-6
18-11
16-6
12-9
20-2
18-2
18-2
13-8		 Note b
22-6
21-0
15-11
25-1
21-11
20-9
15-11
Note b
22-6
19-6
15-1
24-7
21-0
21-0
15-11		 8-3
7-5
6-11
5-3
7-10
7-3
6-10
5-3
8-1
7-5
6-4
4-11
7-8
6-11
6-11
5-3		 13-0
10-10
10-2
7-8
12-3
10-7
10-0
7-8
12-9
11-1
9-6
7-3
12-0
10-2
10-2
7-8		 16-7
13-9
12-10
9-9
16-2
13-5
12-8
9-9
16-10
14-0
12-1
9-1
15-4
12-10
12-10
9-9		 20-3
16-9
15-8
11-10
19-10
16-4
15-6
11-10
20-10
16-5
14-4
11-0
18-9
15-8
15-8
11-10		 23-5
19-6
18-3
13-9
23-0
19-0
17-11
13-9
24-8
19-6
16-10
13-1
21-9
18-3
18-3
13-9

Check sources for availability of lumber in lengths greater than 20 feet.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. The tabulated rafter spans assume that ceiling joists are located at the bottom of the attic space or that some other method of resisting the outward push of the

rafters on the bearing walls, such as rafter ties, is provided at that location. Where ceiling joists or rafter ties are located higher in the attic space, the rafter spans shall be multiplied by the following factors:

H /H
C R		 Rafter Span Adjustment Factor
1/3 0.67
1/4 0.76
1/5 0.83
1/6 0.90
1/7.5 or less 1.00

where: HC = Height of ceiling joists or rafter ties measured vertically above the top of the rafter support walls. HR = Height of roof ridge measured vertically above the top of the rafter support walls. b. Span exceeds 26 feet in length.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
12 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 10-0
9-8
9-5
7-1
9-6
9-3
8-10
7-1
9-10
9-6
8-7
6-7
9-3
9-1
9-1
7-1		 15-9
14-9
13-9
10-5
14-10
14-4
13-7
10-5
15-6
14-10
12-11
9-9
14-7
13-9
13-9
10-5		 20-9
18-8
17-5
13-2
19-7
18-2
17-2
13-2
20-5
19-0
16-4
12-4
19-2
17-5
17-5
13-2		 Note b
22-9
21-4
16-1
25-0
22-2
21-0
16-1
Note b
22-3
19-5
15-0
24-6
21-4
21-4
16-1		 Note b
Note b
24-8
18-8
Note b
25-9
24-4
18-8
Note b
26-0
22-10
17-9
Note b
24-8
24-8
18-8		 10-0
9-0
8-5
6-4
9-6
8-9
8-4
6-4
9-10
9-0
7-8
5-11
9-3
8-5
8-5
6-4		 15-9
13-2
12-4
9-4
14-10
12-10
12-2
9-4
15-6
13-5
11-7
8-9
14-7
12-4
12-4
9-4		 20-1
16-8
15-7
11-9
19-7
16-3
15-4
11-9
20-5
17-0
14-8
11-0
18-8
15-7
15-7
11-9		 24-6
20-4
19-1
14-5
24-1
19-10
18-9
14-5
25-4
19-11
17-4
13-5
22-9
19-1
19-1
14-5		 Note b
23-7
22-1
16-8
Note b
23-0
21-9
16-8
Note b
23-7
20-5
15-10
Note b
22-1
22-1
16-8
16 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 9-1
8-9
8-2
6-2
8-7
8-5
8-0
6-2
8-11
8-7
7-6
5-9
8-5
8-2
8-2
6-2		 14-4
12-9
11-11
9-0
13-6
12-5
11-9
9-0
14-1
13-0
11-2
8-6
13-3
11-11
11-11
9-0		 18-10
16-2
15-1
11-5
17-10
15-9
14-11
11-5
18-6
16-6
14-2
10-8
17-5
15-1
15-1
11-5		 23-9
19-9
18-5
13-11
22-9
19-3
18-2
13-11
23-8
19-3
16-10
13-0
22-1
18-5
18-5
13-11		 Note b
22-10
21-5
16-2
Note b
22-3
21-1
16-2
Note b
22-10
19-10
15-4
25-7
21-5
21-5
16-2		 9-1
7-10
7-3
5-6
8-7
7-7
7-2
5-6
8-11
7-10
6-8
5-2
8-5
7-3
7-3
5-6		 13-9
11-5
10-8
8-1
13-6
11-1
10-6
8-1
14-1
11-7
10-0
7-7
12-9
10-8
10-8
8-1		 17-5
14-5
13-6
10-3
17-1
14-1
13-4
10-3
18-5
14-9
12-8
9-7
16-2
13-6
13-6
10-3		 21-3
17-8
16-6
12-6
20-10
17-2
16-3
12-6
21-11
17-3
15-1
11-7
19-9
16-6
16-6
12-6		 24-8
20-5
19-2
14-6
24-2
19-11
18-10
14-6
25-11
20-5
17-9
13-9
22-10
19-2
19-2
14-6
19.2 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3		 8-7
7-11
7-5
5-7
8-1
7-9
7-4
5-7		 13-6
11-8
10-11
8-3
12-9
11-4
10-9
8-3		 17-9
14-9
13-9
10-5
16-9
14-4
13-7
10-5		 21-8
18-0
16-10
12-9
21-4
17-7
16-7
12-9		 25-2
20-11
19-6
14-9
24-8
20-4
19-3
14-9		 8-7
7-1
6-8
5-0
8-1
6-11
6-7
5-0		 12-6
10-5
9-9
7-4
12-4
10-2
9-7
7-4		 15-10
13-2
12-4
9-4
15-7
12-10
12-2
9-4		 19-5
16-1
15-1
11-5
19-1
15-8
14-10
11-5		 22-6
18-8
17-6
13-2
22-1
18-2
17-3
13-2

(continued)

TABLE 2308.7.2(3)

RAFTER SPANS FOR COMMON LUMBER SPECIES (Ground snow load = 30 psf, ceiling not attached to rafters, L/∆ = 180)

366 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.2(3)—continued RAFTER SPANS FOR COMMON LUMBER SPECIES (Ground snow load = 30 psf, ceiling not attached to rafters, L/∆ = 180)

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
19.2 Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 8-5
8-0
6-10
5-3
7-11
7-5
7-5
5-7		 13-3
11-10
10-2
7-9
12-5
10-11
10-11
8-3		 17-5
15-1
12-11
9-9
16-5
13-9
13-9
10-5		 22-3
17-7
15-4
11-10
20-2
16-10
16-10
12-9		 Note b
20-11
18-1
14-0
23-4
19-6
19-6
14-9		 8-5
7-1
6-1
4-8
7-11
6-8
6-8
5-0		 13-3
10-7
9-2
6-11
11-8
9-9
9-9
7-4		 16-10
13-5
11-7
8-9
14-9
12-4
12-4
9-4		 20-0
15-9
13-9
10-7
18-0
15-1
15-1
11-5		 23-7
18-8
16-2
12-6
20-11
17-6
17-6
13-2
24 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 7-11
7-1
6-8
5-0
7-6
6-11
6-7
5-0
7-10
7-1
6-1
4-8
7-4
6-8
6-8
5-0		 12-6
10-5
9-9
7-4
11-10
10-2
9-7
7-4
12-3
10-7
9-2
6-11
11-7
9-9
9-9
7-4		 15-10
13-2
12-4
9-4
15-7
12-10
12-2
9-4
16-2
13-5
11-7
8-9
14-9
12-4
12-4
9-4		 19-5
16-1
15-1
11-5
19-1
15-8
14-10
11-5
20-0
15-9
13-9
10-7
18-0
15-1
15-1
11-5		 22-6
18-8
17-6
13-2
22-1
18-2
17-3
13-2
23-7
18-8
16-2
12-6
20-11
17-6
17-6
13-2		 7-8
6-4
5-11
4-6
7-6
6-2
5-10
4-6
7-10
6-4
5-5
4-2
7-1
5-11
5-11
4-6		 11-3
9-4
8-8
6-7
11-0
9-1
8-7
6-7
11-10
9-6
8-2
6-2
10-5
8-8
8-8
6-7		 14-2
11-9
11-0
8-4
13-11
11-6
10-10
8-4
15-0
12-0
10-4
7-10
13-2
11-0
11-0
8-4		 17-4
14-5
13-6
10-2
17-0
14-0
13-3
10-2
17-11
14-1
12-3
9-6
16-1
13-6
13-6
10-2		 20-1
16-8
15-7
11-10
19-9
16-3
15-5
11-10
21-2
16-8
14-6
11-2
18-8
15-7
15-7
11-10

Check sources for availability of lumber in lengths greater than 20 feet.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. The tabulated rafter spans assume that ceiling joists are located at the bottom of the attic space or that some other method of resisting the outward push of the

rafters on the bearing walls, such as rafter ties, is provided at that location. Where ceiling joists or rafter ties are located higher in the attic space, the rafter spans shall be multiplied by the following factors:

H /H
C R		 Rafter Span Adjustment Factor
1/3 0.67
1/4 0.76
1/5 0.83
1/6 0.90
1/7.5 or less 1.00

where: HC = Height of ceiling joists or rafter ties measured vertically above the top of the rafter support walls. HR = Height of roof ridge measured vertically above the top of the rafter support walls. b. Span exceeds 26 feet in length.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
12 Douglas Fir-Larch
SS
Douglas Fir-larch
#1
Douglas Fir-larch
#2
Douglas Fir-larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 8-5
8-2
7-8
5-10
8-0
7-10
7-5
5-10
8-4
8-0
7-0
5-5
7-10
7-8
7-8
5-10		 13-3
12-0
11-3
8-6
12-6
11-9
11-1
8-6
13-1
12-3
10-6
8-0
12-3
11-3
11-3
8-6		 17-6
15-3
14-3
10-9
16-6
14-10
14-0
10-9
17-2
15-6
13-4
10-1
16-2
14-3
14-3
10-9		 22-4
18-7
17-5
13-2
21-1
18-1
17-2
13-2
21-11
18-2
15-10
12-3
20-8
17-5
17-5
13-2		 26-0
21-7
20-2
15-3
25-6
21-0
19-11
15-3
Note b
21-7
18-8
14-6
24-1
20-2
20-2
15-3		 8-5
7-7
7-1
5-5
8-0
7-5
7-0
5-5
8-4
7-7
6-6
5-0
7-10
7-1
7-1
5-5		 13-3
11-2
10-5
7-10
12-6
10-10
10-3
7-10
13-1
11-4
9-9
7-5
12-3
10-5
10-5
7-10		 17-0
14-1
13-2
10-0
16-6
13-9
13-0
10-0
17-2
14-5
12-4
9-4
15-9
13-2
13-2
10-0		 20-9
17-3
16-1
12-2
20-4
16-9
15-10
12-2
21-5
16-10
14-8
11-4
19-3
16-1
16-1
12-2		 24-0
20-0
18-8
14-1
23-7
19-5
18-5
14-1
25-3
20-0
17-3
13-5
22-4
18-8
18-8
14-1
16 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 7-8
7-1
6-8
5-0
7-3
6-11
6-7
5-0
7-6
7-1
6-1
4-8
7-1
6-8
6-8
5-0		 12-1
10-5
9-9
7-4
11-5
10-2
9-7
7-4
11-10
10-7
9-2
6-11
11-2
9-9
9-9
7-4		 15-10
13-2
12-4
9-4
15-0
12-10
12-2
9-4
15-7
13-5
11-7
8-9
14-8
12-4
12-4
9-4		 19-5
16-1
15-1
11-5
19-1
15-8
14-10
11-5
19-11
15-9
13-9
10-7
18-0
15-1
15-1
11-5		 22-6
18-8
17-6
13-2
22-1
18-2
17-3
13-2
23-7
18-8
16-2
12-6
20-11
17-6
17-6
13-2		 7-8
6-7
6-2
4-8
7-3
6-5
6-1
4-8
7-6
6-7
5-8
4-4
7-1
6-2
6-2
4-8		 11-7
9-8
9-0
6-10
11-5
9-5
8-11
6-10
11-10
9-10
8-5
6-5
10-9
9-0
9-0
6-10		 14-8
12-2
11-5
8-8
14-5
11-11
11-3
8-8
15-7
12-5
10-9
8-1
13-8
11-5
11-5
8-8		 17-11
14-11
13-11
10-6
17-8
14-6
13-9
10-6
18-6
14-7
12-9
9-10
15-11
13-11
13-11
10-6		 20-10
17-3
16-2
12-3
20-5
16-10
15-11
12-3
21-10
17-3
15-0
11-7
19-4
16-2
16-2
12-3
19.2 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3		 7-3
6-6
6-1
4-7
6-10
6-4
6-0
4-7		 11-4
9-6
8-11
6-9
10-9
9-3
8-9
6-9		 14-6
12-0
11-3
8-6
14-2
11-9
11-1
8-6		 17-8
14-8
13-9
10-5
17-5
14-4
13-7
10-5		 20-6
17-1
15-11
12-1
20-2
16-7
15-9
12-1		 7-3
6-0
5-7
4-3
6-10
5-10
5-7
4-3		 10-7
8-10
8-3
6-3
10-5
8-7
8-1
6-3		 13-5
11-2
10-5
7-11
13-2
10-10
10-3
7-11		 16-5
13-7
12-9
9-7
16-1
13-3
12-7
9-7		 19-0
15-9
14-9
11-2
18-8
15-5
14-7
11-2

(continued)

TABLE 2308.7.2(4)

RAFTER SPANS FOR COMMON LUMBER SPECIES (Ground snow load = 50 psf, ceiling not attached to rafters, L/∆ = 180)

368 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.2(4) RAFTER SPANS FOR COMMON LUMBER SPECIES (Ground snow load = 50 psf, ceiling not attached to rafters, L/∆ = 180)

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
19.2 Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 7-1
6-6
5-7
4-3
6-8
6-1
6-1
4-7		 11-2
9-8
8-4
6-4
10-6
8-11
8-11
6-9		 14-8
12-3
10-7
8-0
13-5
11-3
11-3
8-6		 18-3
14-4
12-6
9-8
16-5
13-9
13-9
10-5		 21-7
17-1
14-9
11-5
19-1
15-11
15-11
12-1		 7-1
6-0
5-2
4-0
6-8
5-7
5-7
4-3		 11-2
9-0
7-9
5-10
9-10
8-3
8-3
6-3		 14-2
11-4
9-9
7-4
12-5
10-5
10-5
7-11		 16-11
13-4
11-7
8-11
15-3
12-9
12-9
9-7		 20-0
15-9
13-8
10-7
17-8
14-9
14-9
11-2
24 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 6-8
5-10
5-5
4-1
6-4
5-8
5-4
4-1
6-7
5-10
5-0
3-10
6-2
5-5
5-5
4-1		 10-3
8-6
7-11
6-0
9-11
8-3
7-10
6-0
10-4
8-8
7-5
5-8
9-6
7-11
7-11
6-0		 13-0
10-9
10-1
7-7
12-9
10-6
9-11
7-7
13-8
11-0
9-5
7-1
12-0
10-1
10-1
7-7		 15-10
13-2
12-4
9-4
15-7
12-10
12-1
9-4
16-4
12-10
11-3
8-8
14-8
12-4
12-4
9-4		 18-4
15-3
14-3
10-9
18-0
14-10
14-1
10-9
19-3
15-3
13-2
10-3
17-1
14-3
14-3
10-9		 6-6
5-5
5-0
3-10
6-4
5-3
4-11
3-10
6-7
5-5
4-7
3-6
6-0
5-0
5-0
3-10		 9-6
7-10
7-4
5-7
9-4
7-8
7-3
5-7
10-0
8-0
6-11
5-3
8-10
7-4
7-4
5-7		 12-0
10-0
9-4
7-1
11-9
9-9
9-2
7-1
12-8
10-2
8-9
6-7
11-2
9-4
9-4
7-1		 14-8
12-2
11-5
8-7
14-5
11-10
11-3
8-7
15-2
11-11
10-5
8-0
13-7
11-5
11-5
8-7		 17-0
14-1
13-2
10-0
16-8
13-9
13-0
10-0
17-10
14-1
12-3
9-6
15-9
13-2
13-2
10-0

Check sources for availability of lumber in lengths greater than 20 feet.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. The tabulated rafter spans assume that ceiling joists are located at the bottom of the attic space or that some other method of resisting the outward push of the

rafters on the bearing walls, such as rafter ties, is provided at that location. Where ceiling joists or rafter ties are located higher in the attic space, the rafter spans shall be multiplied by the following factors:

H /H
C R		 Rafter Span Adjustment Factor
1/3 0.67
1/4 0.76
1/5 0.83
1/6 0.90
1/7.5 or less 1.00

where: HC = Height of ceiling joists or rafter ties measured vertically above the top of the rafter support walls. HR = Height of roof ridge measured vertically above the top of the rafter support walls. b. Span exceeds 26 feet in length.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
12 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 9-1
8-9
8-7
7-1
8-7
8-5
8-0
7-1
8-11
8-7
8-3
6-7
8-5
8-3
8-3
7-1		 14-4
13-9
13-6
10-5
13-6
13-3
12-7
10-5
14-1
13-6
12-11
9-9
13-3
12-11
12-11
10-5		 18-10
18-2
17-5
13-2
17-10
17-5
16-7
13-2
18-6
17-10
16-4
12-4
17-5
17-0
17-0
13-2		 24-1
22-9
21-4
16-1
22-9
22-2
21-0
16-1
23-8
22-3
19-5
15-0
22-3
21-4
21-4
16-1		 Note b
Note b
24-8
18-8
Note b
25-9
24-4
18-8
Note b
Note b
22-10
17-9
Note b
24-8
24-8
18-8		 9-1
8-9
8-5
6-4
8-7
8-5
8-0
6-4
8-11
8-7
7-8
5-11
8-5
8-3
8-3
6-4		 14-4
13-2
12-4
9-4
13-6
12-10
12-2
9-4
14-1
13-5
11-7
8-9
13-3
12-4
12-4
9-4		 18-10
16-8
15-7
11-9
17-10
16-3
15-4
11-9
18-6
17-0
14-8
11-0
17-5
15-7
15-7
11-9		 24-1
20-4
19-1
14-5
22-9
19-10
18-9
14-5
23-8
19-11
17-4
13-5
22-3
19-1
19-1
14-5		 Note b
23-7
22-1
16-8
Note b
23-0
21-9
16-8
Note b
23-7
20-5
15-10
Note b
22-1
22-1
16-8
16 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 8-3
8-0
7-10
6-2
7-10
7-8
7-3
6-2
8-1
7-10
7-6
5-9
7-8
7-6
7-6
6-2		 13-0
12-6
11-11
9-0
12-3
12-0
11-5
9-0
12-9
12-3
11-2
8-6
12-0
11-9
11-9
9-0		 17-2
16-2
15-1
11-5
16-2
15-9
14-11
11-5
16-10
16-2
14-2
10-8
15-10
15-1
15-1
11-5		 21-10
19-9
18-5
13-11
20-8
19-3
18-2
13-11
21-6
19-3
16-10
13-0
20-2
18-5
18-5
13-11		 Note b
22-10
21-5
16-2
25-1
22-3
21-1
16-2
Note b
22-10
19-10
15-4
24-7
21-5
21-5
16-2		 8-3
7-10
7-3
5-6
7-10
7-7
7-2
5-6
8-1
7-10
6-8
5-2
7-8
7-3
7-3
5-6		 13-0
11-5
10-8
8-1
12-3
11-1
10-6
8-1
12-9
11-7
10-0
7-7
12-0
10-8
10-8
8-1		 17-2
14-5
13-6
10-3
16-2
14-1
13-4
10-3
16-10
14-9
12-8
9-7
15-10
13-6
13-6
10-3		 21-3
17-8
16-6
12-6
20-8
17-2
16-3
12-6
21-6
17-3
15-1
11-7
19-9
16-6
16-6
12-6		 24-8
20-5
19-2
14-6
24-2
19-11
18-10
14-6
25-11
20-5
17-9
13-9
22-10
19-2
19-2
14-6
19.2 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3		 7-9
7-6
7-4
5-7
7-4
7-2
6-10
5-7		 12-3
11-8
10-11
8-3
11-7
11-4
10-9
8-3		 16-1
14-9
13-9
10-5
15-3
14-4
13-7
10-5		 20-7
18-0
16-10
12-9
19-5
17-7
16-7
12-9		 25-0
20-11
19-6
14-9
23-7
20-4
19-3
14-9		 7-9
7-1
6-8
5-0
7-4
6-11
6-7
5-0		 12-3
10-5
9-9
7-4
11-7
10-2
9-7
7-4		 15-10
13-2
12-4
9-4
15-3
12-10
12-2
9-4		 19-5
16-1
15-1
11-5
19-1
15-8
14-10
11-5		 22-6
18-8
17-6
13-2
22-1
18-2
17-3
13-2

(continued)

TABLE 2308.7.2(5)

RAFTER SPANS FOR COMMON LUMBER SPECIES (Ground snow load = 30 psf, ceiling attached to rafters, L/∆ = 240)

370 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

TABLE 2308.7.2(5)—continued RAFTER SPANS FOR COMMON LUMBER SPECIES (Ground snow load = 30 psf, ceiling attached to rafters, L/∆ = 240)

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
19.2 Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 7-8
7-4
6-10
5-3
7-2
7-0
7-0
5-7		 12-0
11-7
10-2
7-9
11-4
10-11
10-11
8-3		 15-10
15-1
12-11
9-9
14-11
13-9
13-9
10-5		 20-2
17-7
15-4
11-10
19-0
16-10
16-10
12-9		 24-7
20-11
18-1
14-0
23-1
19-6
19-6
14-9		 7-8
7-1
6-1
4-8
7-2
6-8
6-8
5-0		 12-0
10-7
9-2
6-11
11-4
9-9
9-9
7-4		 15-10
13-5
11-7
8-9
14-9
12-4
12-4
9-4		 20-0
15-9
13-9
10-7
18-0
15-1
15-1
11-5		 23-7
18-8
16-2
12-6
20-11
17-6
17-6
13-2
24 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 7-3
7-0
6-8
5-0
6-10
6-8
6-4
5-0
7-1
6-10
6-1
4-8
6-8
6-6
6-6
5-0		 11-4
10-5
9-9
7-4
10-9
10-2
9-7
7-4
11-2
10-7
9-2
6-11
10-6
9-9
9-9
7-4		 15-0
13-2
12-4
9-4
14-2
12-10
12-2
9-4
14-8
13-5
11-7
8-9
13-10
12-4
12-4
9-4		 19-1
16-1
15-1
11-5
18-0
15-8
14-10
11-5
18-9
15-9
13-9
10-7
17-8
15-1
15-1
11-5		 22-6
18-8
17-6
13-2
21-11
18-2
17-3
13-2
22-10
18-8
16-2
12-6
20-11
17-6
17-6
13-2		 7-3
6-4
5-11
4-6
6-10
6-2
5-10
4-6
7-1
6-4
5-5
4-2
6-8
5-11
5-11
4-6		 11-3
9-4
8-8
6-7
10-9
9-1
8-7
6-7
11-2
9-6
8-2
6-2
10-5
8-8
8-8
6-7		 14-2
11-9
11-0
8-4
13-11
11-6
10-10
8-4
14-8
12-0
10-4
7-10
13-2
11-0
11-0
8-4		 17-4
14-5
13-6
10-2
17-0
14-0
13-3
10-2
17-11
14-1
12-3
9-6
16-1
13-6
13-6
10-2		 20-1
16-8
15-7
11-10
19-9
16-3
15-5
11-10
21-2
16-8
14-6
11-2
18-8
15-7
15-7
11-10

Check sources for availability of lumber in lengths greater than 20 feet.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. The tabulated rafter spans assume that ceiling joists are located at the bottom of the attic space or that some other method of resisting the outward push of the

rafters on the bearing walls, such as rafter ties, is provided at that location. Where ceiling joists or rafter ties are located higher in the attic space, the rafter spans shall be multiplied by the following factors:

H /H
C R		 Rafter Span Adjustment Factor
1/3 0.67
1/4 0.76
1/5 0.83
1/6 0.90
1/7.5 or less 1.00

where: HC = Height of ceiling joists or rafter ties measured vertically above the top of the rafter support walls. HR = Height of roof ridge measured vertically above the top of the rafter support walls. b. Span exceeds 26 feet in length.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

WOOD

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
12 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 7-8
7-5
7-3
5-10
7-3
7-1
6-9
5-10
7-6
7-3
6-11
5-5
7-1
6-11
6-11
5-10		 12-1
11-7
11-3
8-6
11-5
11-2
10-8
8-6
11-10
11-5
10-6
8-0
11-2
10-11
10-11
8-6		 15-11
15-3
14-3
10-9
15-0
14-8
14-0
10-9
15-7
15-0
13-4
10-1
14-8
14-3
14-3
10-9		 20-3
18-7
17-5
13-2
19-2
18-1
17-2
13-2
19-11
18-2
15-10
12-3
18-9
17-5
17-5
13-2		 24-8
21-7
20-2
15-3
23-4
21-0
19-11
15-3
24-3
21-7
18-8
14-6
22-10
20-2
20-2
15-3		 7-8
7-5
7-1
5-5
7-3
7-1
6-9
5-5
7-6
7-3
6-6
5-0
7-1
6-11
6-11
5-5		 12-1
11-2
10-5
7-10
11-5
10-10
10-3
7-10
11-10
11-4
9-9
7-5
11-2
10-5
10-5
7-10		 15-11
14-1
13-2
10-0
15-0
13-9
13-0
10-0
15-7
14-5
12-4
9-4
14-8
13-2
13-2
10-0		 20-3
17-3
16-1
12-2
19-2
16-9
15-10
12-2
19-11
16-10
14-8
11-4
18-9
16-1
16-1
12-2		 24-0
20-0
18-8
14-1
23-4
19-5
18-5
14-1
24-3
20-0
17-3
13-5
22-4
18-8
18-8
14-1
16 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 7-0
6-9
6-7
5-0
6-7
6-5
6-2
5-0
6-10
6-7
6-1
4-8
6-5
6-4
6-4
5-0		 11-0
10-5
9-9
7-4
10-4
10-2
9-7
7-4
10-9
10-4
9-2
6-11
10-2
9-9
9-9
7-4		 14-5
13-2
12-4
9-4
13-8
12-10
12-2
9-4
14-2
13-5
11-7
8-9
13-4
12-4
12-4
9-4		 18-5
16-1
15-1
11-5
17-5
15-8
14-10
11-5
18-1
15-9
13-9
10-7
17-0
15-1
15-1
11-5		 22-5
18-8
17-6
13-2
21-2
18-2
17-3
13-2
22-0
18-8
16-2
12-6
20-9
17-6
17-6
13-2		 7-0
6-7
6-2
4-8
6-7
6-5
6-1
4-8
6-10
6-7
5-8
4-4
6-5
6-2
6-2
4-8		 11-0
9-8
9-0
6-10
10-4
9-5
8-11
6-10
10-9
9-10
8-5
6-5
10-2
9-0
9-0
6-10		 14-5
12-2
11-5
8-8
13-8
11-11
11-3
8-8
14-2
12-5
10-9
8-1
13-4
11-5
11-5
8-8		 17-11
14-11
13-11
10-6
17-5
14-6
13-9
10-6
18-1
14-7
12-9
9-10
16-8
13-11
13-11
10-6		 20-10
17-3
16-2
12-3
20-5
16-10
15-11
12-3
21-10
17-3
15-0
11-7
19-4
16-2
16-2
12-3
19.2 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3		 6-7
6-4
6-1
4-7
6-2
6-1
5-9
4-7		 10-4
9-6
8-11
6-9
9-9
9-3
8-9
6-9		 13-7
12-0
11-3
8-6
12-10
11-9
11-1
8-6		 17-4
14-8
13-9
10-5
16-5
14-4
13-7
10-5		 20-6
17-1
15-11
12-1
19-11
16-7
15-9
12-1		 6-7
6-0
5-7
4-3
6-2
5-10
5-7
4-3		 10-4
8-10
8-3
6-3
9-9
8-7
8-1
6-3		 13-5
11-2
10-5
7-11
12-10
10-10
10-3
7-11		 16-5
13-7
12-9
9-7
16-1
13-3
12-7
9-7		 19-0
15-9
14-9
11-2
18-8
15-5
14-7
11-2

(continued)

TABLE 2308.7.2(6)

RAFTER SPANS FOR COMMON LUMBER SPECIES (Ground snow load = 50 psf, ceiling attached to rafters, L/∆ = 240)

372 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

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TABLE 2308.7.2(6)—continued RAFTER SPANS FOR COMMON LUMBER SPECIES (Ground snow load = 50 psf, ceiling attached to rafters, L/∆ = 240)

RAFTER
SPACING
(inches)		 SPECIES AND GRADE DEAD LOAD = 10 psf DEAD LOAD = 20 psf
RAFTER
SPACING
(inches)		 SPECIES AND GRADE 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12 2 × 4 2 × 6 2 × 8 2 × 10 2 × 12
RAFTER
SPACING
(inches)		 SPECIES AND GRADE Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa Maximum rafter spansa
RAFTER
SPACING
(inches)		 SPECIES AND GRADE (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.) (ft. - in.)
19.2 Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 6-5
6-2
5-7
4-3
6-1
5-11
5-11
4-7		 10-2
9-8
8-4
6-4
9-6
8-11
8-11
6-9		 13-4
12-3
10-7
8-0
12-7
11-3
11-3
8-6		 17-0
14-4
12-6
9-8
16-0
13-9
13-9
10-5		 20-9
17-1
14-9
11-5
19-1
15-11
15-11
12-1		 6-5
6-0
5-2
4-0
6-1
5-7
5-7
4-3		 10-2
9-0
7-9
5-10
9-6
8-3
8-3
6-3		 13-4
11-4
9-9
7-4
12-5
10-5
10-5
7-11		 16-11
13-4
11-7
8-11
15-3
12-9
12-9
9-7		 20-0
15-9
13-8
10-7
17-8
14-9
14-9
11-2
24 Douglas Fir-Larch
SS
Douglas Fir-Larch
#1
Douglas Fir-Larch
#2
Douglas Fir-Larch
#3
Hem-Fir
SS
Hem-Fir
#1
Hem-Fir
#2
Hem-Fir
#3
Southern Pine
SS
Southern Pine
#1
Southern Pine
#2
Southern Pine
#3
Spruce-Pine-Fir
SS
Spruce-Pine-Fir
#1
Spruce-Pine-Fir
#2
Spruce-Pine-Fir
#3		 6-1
5-10
5-5
4-1
5-9
5-8
5-4
4-1
6-0
5-9
5-0
3-10
5-8
5-5
5-5
4-1		 9-7
8-6
7-11
6-0
9-1
8-3
7-10
6-0
9-5
8-8
7-5
5-8
8-10
7-11
7-11
6-0		 12-7
10-9
10-1
7-7
11-11
10-6
9-11
7-7
12-5
11-0
9-5
7-1
11-8
10-1
10-1
7-7		 15-10
13-2
12-4
9-4
15-2
12-10
12-1
9-4
15-10
12-10
11-3
8-8
14-8
12-4
12-4
9-4		 18-4
15-3
14-3
10-9
18-0
14-10
14-1
10-9
19-3
15-3
13-2
10-3
17-1
14-3
14-3
10-9		 6-1
5-5
5-0
3-10
5-9
5-3
4-11
3-10
6-0
5-5
4-7
3-6
5-8
5-0
5-0
3-10		 9-6
7-10
7-4
5-7
9-1
7-8
7-3
5-7
9-5
8-0
6-11
5-3
8-10
7-4
7-4
5-7		 12-0
10-0
9-4
7-1
11-9
9-9
9-2
7-1
12-5
10-2
8-9
6-7
11-2
9-4
9-4
7-1		 14-8
12-2
11-5
8-7
14-5
11-10
11-3
8-7
15-2
11-11
10-5
8-0
13-7
11-5
11-5
8-7		 17-0
14-1
13-2
10-0
15-11
13-9
13-0
10-0
17-10
14-1
12-3
9-6
15-9
13-2
13-2
10-0

Check sources for availability of lumber in lengths greater than 20 feet.

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kPa. a. The tabulated rafter spans assume that ceiling joists are located at the bottom of the attic space or that some other method of resisting the outward push of the

rafters on the bearing walls, such as rafter ties, is provided at that location. Where ceiling joists or rafter ties are located higher in the attic space, the rafter spans shall be multiplied by the following factors:

H /H
C R		 Rafter Span Adjustment Factor
1/3 0.67
1/4 0.76
1/5 0.83
1/6 0.90
1/7.5 or less 1.00

where: HC = Height of ceiling joists or rafter ties measured vertically above the top of the rafter support walls. HR = Height of roof ridge measured vertically above the top of the rafter support walls.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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TABLE 2308.7.3.1

RAFTER TIE CONNECTIONS g

RAFTER SLOPE TIE SPACING (inches) NO SNOW LOAD GROUND SNOW LOAD (pound per square foot)
RAFTER SLOPE TIE SPACING (inches) NO SNOW LOAD NO SNOW LOAD NO SNOW LOAD NO SNOW LOAD NO SNOW LOAD 30 pounds per square foot 30 pounds per square foot 30 pounds per square foot 30 pounds per square foot 50 pounds per square foot 50 pounds per square foot 50 pounds per square foot 50 pounds per square foot
RAFTER SLOPE TIE SPACING (inches) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet) Roof span (feet)
RAFTER SLOPE TIE SPACING (inches) 12 20 28 36 36 12 20 28 36 12 20 28 36
RAFTER SLOPE TIE SPACING (inches) Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f** Required number of 16d common (31/2²** x 0.162²) nailsa, bper connectionc, d, e, f**
3:12 12 4 6 8 8 10 4 6 8 11 5 8 12 15
3:12 16 5 7 10 10 13 5 8 11 14 6 11 15 20
3:12 24 7 11 15 15 19 7 11 16 21 9 16 23 30
3:12 32 10 14 19 19 25 10 16 22 28 12 27 30 40
3:12 48 14 21 29 29 37 14 32 36 42 18 32 46 60
4:12 12 3 4 5 5 6 3 5 6 8 4 6 9 11
4:12 16 3 5 7 7 8 4 6 8 11 5 8 12 15
4:12 24 4 7 10 10 12 5 9 12 16 7 12 17 22
4:12 32 6 9 13 13 16 8 12 16 22 10 16 24 30
4:12 48 8 14 19 19 24 10 18 24 32 14 24 34 44
5:12 12 3 3 4 4 5 3 4 5 7 3 5 7 9
5:12 16 3 4 5 5 7 3 5 7 9 4 7 9 12
5:12 24 4 6 8 8 10 4 7 10 13 6 10 14 18
5:12 32 5 8 10 10 13 6 10 14 18 8 14 18 24
5:12 48 7 11 15 15 20 8 14 20 26 12 20 28 36
7:12 12 3 3 3 3 4 3 3 4 5 3 4 5 7
7:12 16 3 3 4 4 5 3 4 5 6 3 5 7 9
7:12 24 3 4 6 6 7 3 5 7 9 4 7 10 13
7:12 32 4 6 8 8 10 4 8 10 12 6 10 14 18
7:12 48 5 8 11 11 14 6 10 14 18 9 14 20 26
9:12 12 3 3 3 3 3 3 3 3 4 3 3 4 5
9:12 16 3 3 3 3 4 3 3 4 5 3 4 5 7
9:12 24 3 3 5 5 6 3 4 6 7 3 6 8 10
9:12 32 3 4 6 6 8 4 6 8 10 5 8 10 14
9:12 48 4 6 9 9 11 5 8 12 14 7 12 16 20
12:12 12 3 3 3 3 3 3 3 3 3 3 3 3 4
12:12 16 3 3 3 3 3 3 3 3 4 3 3 4 5
12:12 24 3 3 3 3 4 3 3 4 6 3 4 6 8
12:12 32 3 3 4 4 5 3 5 6 8 4 6 8 10
12:12 48 3 4 6 6 7 4 7 8 12 6 8 12 16

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 47.8 N/m 2 . a. 40d box (5″ × 0.162″) or 16d sinker (3 1 /4″ × 0.148″) nails are permitted to be substituted for 16d common (3 1 /2″ × 0.16″) nails. b. Nailing requirements are permitted to be reduced 25 percent if nails are clinched. c. Rafter tie heel joint connections are not required where the ridge is supported by a load-bearing wall, header or ridge beam. d. Where intermediate support of the rafter is provided by vertical struts or purlins to a load-bearing wall, the tabulated heel joint connection requirements are

permitted to be reduced proportionally to the reduction in span. e. Equivalent nailing patterns are required for ceiling joist to ceiling joist lap splices. f. Connected members shall be of sufficient size to prevent splitting due to nailing. g. For snow loads less than 30 pounds per square foot, the required number of nails is permitted to be reduced by multiplying by the ratio of actual snow load

plus 10 divided by 40, but not less than the number required for no snow load.

374 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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TABLE 2308.7.5 REQUIRED RATING OF APPROVED UPLIFT CONNECTORS (pounds)a, b, c, e, f, g, h
NOMINAL DESIGN WIND
SPEED,****Vasd i		 ROOF SPAN (feet) ROOF SPAN (feet) ROOF SPAN (feet) ROOF SPAN (feet) ROOF SPAN (feet) ROOF SPAN (feet) ROOF SPAN (feet) OVERHANGS
(pounds/feet)d
NOMINAL DESIGN WIND
SPEED,****Vasd i		 12 20 24 28 32 36 40 40
85 -72 -120 -145 -169 -193 -217 -241 -38.55
90 -91 -151 -181 -212 -242 -272 -302 -43.22
100 -131 -281 -262 -305 -349 -393 -436 -53.36
110 -175 -292 -351 -409 -467 -526 -584 -64.56

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 mile per hour = 1.61 km/hr, 1 pound = 0.454 Kg, 1 pound/foot = 14.5939 N/m. a. The uplift connection requirements are based on a 30-foot mean roof height located in Exposure B. For Exposure C or D and for other mean roof heights,

multiply the loads by the following adjustment coefficients:

Mean Roof Height (feet)
EXPOSURE 15 20 25 30 35 40 45 50 55 60
B 1.00 1.00 1.00 1.00 1.05 1.09 1.12 1.16 1.19 1.22
C 1.21 1.29 1.35 1.40 1.45 1.49 1.53 1.56 1.59 1.62
D 1.47 1.55 1.61 1.66 1.70 1.74 1.78 1.81 1.84 1.87

b. The uplift connection requirements are based on the framing being spaced 24 inches on center. Multiply by 0.67 for framing spaced 16 inches on center and

multiply by 0.5 for framing spaced 12 inches on center. c. The uplift connection requirements include an allowance for 10 pounds of dead load. d. The uplift connection requirements do not account for the effects of overhangs. The magnitude of the loads shall be increased by adding the overhang loads

found in the table. The overhang loads are based on framing spaced 24 inches on center. The overhang loads given shall be multiplied by the overhang projection and added to the roof uplift value in the table. e. The uplift connection requirements are based on wind loading on end zones as defined in Figure 28.5-1 of ASCE 7. Connection loads for connections located

a distance of 20 percent of the least horizontal dimension of the building from the corner of the building are permitted to be reduced by multiplying the table connection value by 0.7 and multiplying the overhang load by 0.8. f. For wall-to-wall and wall-to-foundation connections, the capacity of the uplift connector is permitted to be reduced by 100 pounds for each full wall above.

(For example, if a 500-pound rated connector is used on the roof framing, a 400-pound rated connector is permitted at the next floor level down). g. Interpolation is permitted for intermediate values of Vasd and roof spans. h. The rated capacity of approved tie-down devices is permitted to include up to a 60-percent increase for wind effects where allowed by material specifications. i. Vasd shall be determined in accordance with Section 1609.3.1.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

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SPANa
(feet)		 LIVE LOAD
(pounds per square foot)		 DEFLECTION LIMIT BENDING STRESS (f)
(pounds per square inch)		 MODULUS OF ELASTICITY (E)
(pounds per square inch)
Roofs Roofs Roofs Roofs Roofs
4 20 1/240
1/360		 160 170,000
256,000
4 30 1/240
1/360		 210 256,000
384,000
4 40 1/240
1/360		 270 340,000
512,000
4.5 20 1/240
1/360		 200 242,000
305,000
4.5 30 1/240
1/360		 270 363,000
405,000
4.5 40 1/240
1/360		 350 484,000
725,000
5.0 20 1/240
1/360		 250 332,000
500,000
5.0 30 1/240
1/360		 330 495,000
742,000
5.0 40 1/240
1/360		 420 660,000
1,000,000
5.5 20 1/240
1/360		 300 442,000
660,000
5.5 30 1/240
1/360		 400 662,000
998,000
5.5 40 1/240
1/360		 500 884,000
1,330,000
6.0 20 1/240
1/360		 360 575,000
862,000
6.0 30 1/240
1/360		 480 862,000
1,295,000
6.0 40 1/240
1/360		 600 1,150,000
1,730,000

(continued)

TABLE 2308.7.12

ALLOWABLE SPANS FOR 2-INCH TONGUE-AND-GROOVE DECKING

376 2019 CALIFORNIA BUILDING CODE

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

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TABLE 2308.7.12—continued ALLOWABLE SPANS FOR 2-INCH TONGUE-AND-GROOVE DECKING

SPANa
(feet)		 LIVE LOAD
(pounds per square foot)		 DEFLECTION LIMIT BENDING STRESS (f)
(pounds per square inch)		 MODULUS OF ELASTICITY (E)
(pounds per square inch)
Roofs Roofs Roofs Roofs Roofs
6.5 20 1/240
1/360		 420 595,000
892,000
6.5 30 1/240
1/360		 560 892,000
1,340,000
6.5 40 1/240
1/360		 700 1,190,000
1,730,000
7.0 20 1/240
1/360		 490 910,000
1,360,000
7.0 30 1/240
1/360		 650 1,370,000
2,000,000
7.0 40 1/240
1/360		 810 1,820,000
2,725,000
7.5 20 1/240
1/360		 560 1,125,000
1,685,000
7.5 30 1/240
1/360		 750 1,685,000
2,530,000
7.5 40 1/240
1/360		 930 2,250,000
3,380,000
8.0 20 1/240
1/360		 640 1,360,000
2,040,000
8.0 30 1/240
1/360		 850 2,040,000
3,060,000
Floors Floors Floors Floors Floors
4
4.5
5.0		 40 1/360 840
950
1,060		 1,000,000
1,300,000
1,600,000

For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per square foot = 0.0479 kN/m 2, 1 pound per square inch = 0.00689 N/mm 2 . a. Spans are based on simple beam action with 10 pounds per square foot dead load and provisions for a 300-pound concentrated load on a 12-inch width of

decking. Random layup is permitted in accordance with the provisions of Section 2308.7.12. Lumber thickness is 1 1 /2 inches nominal.

Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

100735044

378 2019 CALIFORNIA BUILDING CODE Copyright © 2019 ICC. ALL RIGHTS RESERVED. Accessed by Kevin Day (kevin.day@dgs.ca.gov), (California Building Standards Commission) Order Number #100735044 on Jul 24, 2019 03:54 PM (PDT) pursuant to License Agreement with ICC. No further reproduction or distribution authorized. Single user only, copying and networking prohibited. ANY UNAUTHORIZED REPRODUCTION OR DISTRIBUTION IS A VIOLATION OF THE FEDERAL COPYRIGHT ACT AND THE LICENSE AGREEMENT, AND SUBJECT TO CIVIL AND CRIMINAL PENALTIES THEREUNDER.

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CALIFORNIA BUILDING CODE – MATRIX ADOPTION TABLE

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▸Contents — California Building Code (Title 24, Part 2)
California Building Code (Title 24, Part 2)
  1. Chapter 2 — DEFINITIONS AND ABBREVIATIONS
  2. Appendix G — FLOOD-RESISTANT
  3. Appendix L — EARTHQUAKE RECORDING
  4. Appendix M — TSUNAMI-GENERATED
  5. Chapter 1 — SCOPE AND ADMINISTRATION
  6. Chapter 3 — OCCUPANCY CLASSIFICATION AND USE
  7. Chapter 4 — SPECIAL DETAILED REQUIREMENTS BASED
  8. Chapter 5 — GENERAL BUILDING HEIGHTS AND AREAS
  9. Chapter 6 — TYPES OF CONSTRUCTION
  10. Chapter 7 — FIRE AND SMOKE PROTECTION FEATURES
  11. Chapter 7A — MATERIALS AND CONSTRUCTION
  12. Chapter 8 — INTERIOR FINISHES
  13. Chapter 9 — FIRE PROTECTION AND LIFE SAFETY SYSTEMS
  14. Chapter 10 — MEANS OF EGRESS
  15. Chapter 11A — HOUSING ACCESSIBILITY
  16. Chapter 11B — ACCESSIBILITY TO PUBLIC BUILDINGS, PUBLIC ACCOMM…
  17. Chapter 12 — INTERIOR ENVIRONMENT
  18. Chapter 14 — EXTERIOR WALLS
  19. Chapter 15 — ROOF ASSEMBLIES AND ROOFTOP STRUCTURES
  20. Chapter 16 — STRUCTURAL DESIGN
  21. Chapter 16A — STRUCTURAL DESIGN
  22. Chapter 17 — SPECIAL INSPECTIONS AND TESTS
  23. Chapter 18 — SOILS AND FOUNDATIONS
  24. Chapter 19 — CONCRETE
  25. Chapter 20 — ALUMINUM
  26. Chapter 21 — MASONRY
  27. Chapter 22 — STEEL
  28. ▸Chapter 23 — WOOD
    Overview
    1. Section 2301
    2. Section 2302
    3. Section 2303
    4. Section 2304
    5. Section 2305
    6. Section 2306
    7. Section 2307
    8. Section 2308
    9. Section 2309
  29. Chapter 24 — GLASS AND GLAZING
  30. Chapter 25 — GYPSUM BOARD, GYPSUM PANEL PRODUCTS AND PLASTER
  31. Chapter 26 — PLASTIC
  32. Chapter 27 — ELECTRICAL
  33. Chapter 28 — MECHANICAL SYSTEMS
  34. Chapter 30 — ELEVATORS AND CONVEYING SYSTEMS
  35. Chapter 31 — SPECIAL CONSTRUCTION
  36. Chapter 31B — PUBLIC POOLS
  37. Chapter 31C — RADIATION
  38. Chapter 31D — FOOD ESTABLISHMENTS
  39. Chapter 31F — MARINE OIL TERMINALS
  40. Chapter 32 — ENCROACHMENTS INTO THE PUBLIC RIGHT-OF-WAY
  41. Chapter 33 — SAFEGUARDS DURING CONSTRUCTION
  42. Chapter 35 — REFERENCED STANDARDS
  43. Appendix A — EMPLOYEE QUALIFICATIONS
  44. Appendix B — BOARD OF APPEALS
  45. Appendix C — GROUP U – AGRICULTURAL BUILDINGS
  46. Appendix D — FIRE DISTRICTS
  47. Appendix F — RODENTPROOFING
  48. Appendix H — SIGNS
  49. Appendix I — PATIO COVERS
  50. Appendix J — GRADING
  51. Appendix K — GROUP R-3 AND GROUP R-3.1 OCCUPANCIES
  52. Appendix N — REPLICABLE BUILDINGS
  53. Appendix O — EMERGENCY HOUSING

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