Proposed Modification to
the
Modification #: Section
553.73,
Name: Paul
Coats, PE, CBO
Address: 4695
Hannah Drive, Rock Hill, SC 29732
E-mail: pcoats@awc.org
Phone: 803-980-7304
Fax:
Code: Florida
Building Code - Building
Section #: Tables
2308.9.5, 2308.9.6, 2308.10.2(1), 2308.10.2(2), 2308.10.3(1), 2308.10.3(2)
Text of Modification [additions underlined;
deletions stricken]:
TABLE
2308.9.5
HEADER AND GIRDER SPANSa,b FOR
EXTERIOR BEARING WALLS
(Maximum Spans for Douglas Fir-Larch, Hem-Fir, Southern Pine and
Spruce-Pine-Firb and Required Number of Jack
Studs)
(No change to body of table)
For SI: 1 inch = 25.4 mm, 1 foot = 304.8
mm, 1 pound per square foot = 47.8 N/m2.
a. Spans are given in feet and inches
(ft-in).
b. Tabulated values are for No. 2
grade lumber, except
No.1 or better grade lumber shall be used for Southern Pine 2x4’s.
c. Building width is measured
perpendicular to the ridge. For widths between those shown, spans are permitted
to be interpolated.
d. NJ - Number of jack studs required
to support each end. Where the number of required jack studs equals one, the
header is permitted to be supported by an approved framing anchor attached to the full-height wall stud and
to the header.
e. Reserved
TABLE 2308.9.6
HEADER AND GIRDER SPANSa,b FOR
INTERIOR BEARING WALLS
(Maximum Spans for Douglas
Fir-Larch, Hem-Fir, Southern Pine and Spruce-Pine-Firb and
Required Number of Jack Studs)
(No change to body of table)
For SI: 1
inch = 25.4 mm, 1 foot = 304.8 mm.
a.
Spans are given in feet and inches (ft-in).
b.
Tabulated values are for No. 2 grade lumber, except No.1 or better grade
lumber shall be used for Southern Pine 2x4’s.
c.
Building width is measured perpendicular to the ridge.
For widths between those shown, spans are permitted to be interpolated.
d. NJ - Number of jack studs required
to support each end. Where the number of required jack studs equals one, the
headers are permitted to be supported by an approved framing anchor attached to the full-height wall
stud and to the header.
TABLE 2308.10.2(1)
CEILING JOIST SPANS FOR COMMON LUMBER SPECIES
(Uninhabitable Attics Without Storage, Live
Load = 10 pounds psf, L/Ä = 240)
|
CEILING JOIST SPACING |
SPECIES AND GRADE |
DEAD LOAD = 5 pounds per square foot |
||||
|
2 × 4 2 × 6 2 × 8 2 × 10 |
||||||
|
Maximum ceiling joist spans |
||||||
|
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
|||
|
|
Douglas
Fir-Larch SS |
13-2 |
20-8 |
Note a |
Note a |
|
|
|
Douglas
Fir-Larch #1 |
12-8 |
19-11 |
Note a |
Note a |
|
|
|
Douglas
Fir-Larch #2 |
12-5 |
19-6 |
25-8 |
Note a |
|
|
|
Douglas
Fir-Larch #3 |
10-10 |
15-10 |
20-1 |
24-6 |
|
|
|
Hem-Fir SS |
12-5 |
19-6 |
25-8 |
Note a |
|
|
|
Hem-Fir #1 |
12-2 |
19-1 |
25-2 |
Note a |
|
|
|
Hem-Fir #2 |
11-7 |
18-2 |
24-0 |
Note a |
|
|
|
Hem-Fir #3 |
10-10 |
15-10 |
20-1 |
24-6 |
|
|
12 |
||||||
|
Southern
Pine SS |
12-11 |
20-3 |
Note a |
Note a |
||
|
|
||||||
|
|
Southern
Pine #1 |
12-8 |
19-11 |
Note a |
Note a |
|
|
|
Southern
Pine #2 |
|
19-6 |
25-8 |
Note a |
|
|
|
Southern
Pine #3 |
|
17-0 |
21-8 |
25-7 |
|
|
|
Spruce-Pine-Fir SS |
12-2 |
19-1 |
25-2 |
Note a |
|
|
|
Spruce-Pine-Fir #1 |
11-10 |
18-8 |
24-7 |
Note a |
|
|
|
Spruce-Pine-Fir #2 |
11-10 |
18-8 |
24-7 |
Note a |
|
|
|
Spruce-Pine-Fir #3 |
10-10 |
15-10 |
20-1 |
24-6 |
|
|
|
Douglas
Fir-Larch SS |
11-11 |
18-9 |
24-8 |
Note a |
|
|
|
Douglas
Fir-Larch #1 |
11-6 |
18-1 |
23-10 |
Note a |
|
|
|
Douglas
Fir-Larch #2 |
11-3 |
17-8 |
23-0 |
Note a |
|
|
|
Douglas
Fir-Larch #3 |
9-5 |
13-9 |
17-5 |
21-3 |
|
|
|
Hem-Fir SS |
11-3 |
17-8 |
23-4 |
Note a |
|
|
|
Hem-Fir #1 |
11-0 |
17-4 |
22-10 |
Note a |
|
|
|
Hem-Fir #2 |
10-6 |
16-6 |
21-9 |
Note a |
|
|
|
Hem-Fir #3 |
9-5 |
13-9 |
17-5 |
21-3 |
|
|
16 |
||||||
|
Southern
Pine SS |
11-9 |
18-5 |
24-3 |
Note a |
||
|
|
||||||
|
|
Southern
Pine #1 |
11-6 |
18-1 |
23-1 |
Note a |
|
|
|
Southern
Pine #2 |
|
17-8 |
23-4 |
Note a |
|
|
|
Southern
Pine #3 |
|
14-9 |
18-9 |
22-2 |
|
|
|
Spruce-Pine-Fir SS |
11-0 |
17-4 |
22-10 |
Note a |
|
|
|
Spruce-Pine-Fir #1 |
10-9 |
16-11 |
22-4 |
Note a |
|
|
|
Spruce-Pine-Fir #2 |
10-9 |
16-11 |
22-4 |
Note a |
|
|
|
Spruce-Pine-Fir #3 |
9-5 |
13-9 |
17-5 |
21-3 |
|
(continued)
TABLE 2308.10.2(1)—continued
CEILING JOIST SPANS FOR COMMON LUMBER SPECIES
(Uninhabitable Attics Without Storage, Live
Load = 10 pounds psf, L/Ä = 240)
For SI: 1 inch = 25.4 mm, 1 foot = 304.8
mm, 1 pound per square foot = 47.8 N/m2.
a. Span exceeds 26 feet in length. Check sources for availability of lumber in
lengths greater than 20 feet.
TABLE 2308.10.2(2)
CEILING JOIST SPANS FOR COMMON LUMBER SPECIES
(Uninhabitable Attics With Limited Storage,
Live Load = 20 pounds per square foot, L/Ä = 240)
(continued)
TABLE 2308.10.2(2)—continued
CEILING JOIST SPANS FOR COMMON LUMBER SPECIES
(Uninhabitable Attics With Limited Storage,
Live Load = 20 pounds per square foot, L/Ä = 240)
|
CEILING JOIST SPACING |
SPECIES AND GRADE |
DEAD LOAD = 10 pounds per square foot |
||||
|
2 × 4 |
2 × 6 |
2 × 8 |
2 × 10 |
|||
|
Maximum ceiling joist spans |
||||||
|
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
|||
|
|
Douglas
Fir-Larch SS |
8-11 |
14-0 |
18-5 |
23-4 |
|
|
|
Douglas
Fir-Larch #1 |
8-7 |
12-6 |
15-10 |
19-5 |
|
|
|
Douglas
Fir-Larch #2 |
8-0 |
11-9 |
14-10 |
18-2 |
|
|
|
Douglas
Fir-Larch #3 |
6-1 |
8-10 |
11-3 |
13-8 |
|
|
|
Hem-Fir SS |
8-5 |
13-3 |
17-5 |
22-3 |
|
|
|
Hem-Fir #1 |
8-3 |
12-3 |
15-6 |
18-11 |
|
|
|
Hem-Fir #2 |
7-10 |
11-7 |
14-8 |
17-10 |
|
|
|
Hem-Fir #3 |
6-1 |
8-10 |
11-3 |
13-8 |
|
|
19.2 |
|
|
|
|
|
|
|
Southern
Pine SS |
8-9 |
13-9 |
18-1 |
23-1 |
||
|
|
||||||
|
|
Southern
Pine #1 |
8-7 |
13-6 |
17-9 |
21-1 |
|
|
|
Southern
Pine #2 |
|
12-3 |
15-10 |
18-11 |
|
|
|
Southern
Pine #3 |
|
9-6 |
12-1 |
14-4 |
|
|
|
Spruce-Pine-Fir SS |
8-3 |
12-11 |
17-1 |
21-8 |
|
|
|
Spruce-Pine-Fir #1 |
8-0 |
11-9 |
14-10 |
18-2 |
|
|
|
Spruce-Pine-Fir #2 |
8-0 |
11-9 |
14-10 |
18-2 |
|
|
|
Spruce-Pine-Fir #3 |
6-1 |
8-10 |
11-3 |
13-8 |
|
|
|
Douglas
Fir-Larch SS |
8-3 |
13-0 |
17-1 |
20-11 |
|
|
|
Douglas
Fir-Larch #1 |
7-8 |
11-2 |
14-2 |
17-4 |
|
|
|
Douglas
Fir-Larch #2 |
7-2 |
10-6 |
13-3 |
16-3 |
|
|
|
Douglas
Fir-Larch #3 |
5-5 |
7-11 |
10-0 |
12-3 |
|
|
|
Hem-Fir SS |
7-10 |
12-3 |
16-2 |
20-6 |
|
|
|
Hem-Fir #1 |
7-6 |
10-11 |
13-10 |
16-11 |
|
|
|
Hem-Fir #2 |
7-1 |
10-4 |
13-1 |
16-0 |
|
|
|
Hem-Fir #3 |
5-5 |
7-11 |
10-0 |
12-3 |
|
|
24 |
|
|
|
|
|
|
|
Southern
Pine SS |
8-1 |
12-9 |
16-10 |
21-6 |
||
|
|
||||||
|
|
Southern
Pine #1 |
8-0 |
12-6 |
15-10 |
18-10 |
|
|
|
Southern
Pine #2 |
|
11-0 |
14-2 |
16-11 |
|
|
|
Southern
Pine #3 |
|
8-6 |
10-10 |
12-10 |
|
|
|
Spruce-Pine-Fir SS |
7-8 |
12-0 |
15-10 |
19-5 |
|
|
|
Spruce-Pine-Fir #1 |
7-2 |
10-6 |
13-3 |
16-3 |
|
|
|
Spruce-Pine-Fir #2 |
7-2 |
10-6 |
13-3 |
16-3 |
|
|
|
Spruce-Pine-Fir #3 |
5-5 |
7-11 |
10-0 |
12-3 |
|
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per
square foot = 47.8 N/m2.
a. Span exceeds 26 feet in length. Check sources for availability of lumber in
lengths greater than 20 feet.
TABLE 2308.10.3(1)
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Roof Live Load = 20 pounds per square foot,
Ceiling Not Attached to Rafters, L/Ä = 180)
|
RAFTER |
SPECIES AND GRADE |
DEAD LOAD = 10 pounds per
square foot |
DEAD LOAD = 20 pounds per
square foot |
||||||||||
|
2 × 4 |
2 × 6 |
2 × 8 |
2 × 10 |
2 × 12 |
2 × 4 |
2 × 6 |
2 × 8 |
2 × 10 |
2 × 12 |
||||
|
Maximum rafter spans |
|||||||||||||
|
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
||||
|
|
Douglas
Fir-Larch SS |
11-6 |
18-0 |
23-9 |
Note a |
Note a |
11-6 |
18-0 |
23-5 |
Note a |
Note a |
||
|
|
Douglas
Fir-Larch #1 |
11-1 |
17-4 |
22-5 |
Note a |
Note a |
10-6 |
15-4 |
19-5 |
23-9 |
Note a |
||
|
|
Douglas
Fir-Larch #2 |
10-10 |
16-7 |
21-0 |
25-8 |
Note a |
9-10 |
14-4 |
18-2 |
22-3 |
25-9 |
||
|
|
Douglas
Fir-Larch #3 |
8-7 |
12-6 |
15-10 |
19-5 |
22-6 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
||
|
|
Hem-Fir SS |
10-10 |
17-0 |
22-5 |
Note a |
Note a |
10-10 |
17-0 |
22-5 |
Note a |
Note a |
||
|
|
Hem-Fir #1 |
10-7 |
16-8 |
21-10 |
Note a |
Note a |
10-3 |
14-11 |
18-11 |
23-2 |
Note a |
||
|
|
Hem-Fir #2 |
10-1 |
15-11 |
20-8 |
25-3 |
Note a |
9-8 |
14-2 |
17-11 |
21-11 |
25-5 |
||
|
|
Hem-Fir #3 |
8-7 |
12-6 |
15-10 |
19-5 |
22-6 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
||
|
12 |
|
|
|
|
|
|
|
|
|
|
|
||
|
Southern
Pine SS |
11-3 |
17-8 |
23-4 |
Note a |
Note a |
11-3 |
17-8 |
23-4 |
Note a |
Note a |
|||
|
|
|||||||||||||
|
|
Southern
Pine #1 |
11-1 |
17-4 |
22-11 |
Note a |
Note a |
11-1 |
17-3 |
21-9 |
25-10 |
Note a |
||
|
|
Southern
Pine #2 |
|
17-0 |
22-5 |
Note a |
Note a |
|
15-1 |
19-5 |
23-2 |
Note a |
||
|
|
Southern
Pine #3 |
|
13-6 |
17-2 |
20-3 |
24-1 |
|
11-8 |
14-10 |
17-6 |
20-11 |
||
|
|
Spruce-Pine-Fir SS |
10-7 |
16-8 |
21-11 |
Note a |
Note a |
10-7 |
16-8 |
21-9 |
Note a |
Note a |
||
|
|
Spruce-Pine-Fir #1 |
10-4 |
16-3 |
21-0 |
25-8 |
Note a |
9-10 |
14-4 |
18-2 |
22-3 |
25-9 |
||
|
|
Spruce-Pine-Fir #2 |
10-4 |
16-3 |
21-0 |
25-8 |
Note a |
9-10 |
14-4 |
18-2 |
22-3 |
25-9 |
||
|
|
Spruce-Pine-Fir #3 |
8-7 |
12-6 |
15-10 |
19-5 |
22-6 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
||
|
|
Douglas
Fir-Larch SS |
10-5 |
16-4 |
21-7 |
Note a |
Note a |
10-5 |
16-0 |
20-3 |
24-9 |
Note a |
||
|
|
Douglas
Fir-Larch #1 |
10-0 |
15-4 |
19-5 |
23-9 |
Note a |
9-1 |
13-3 |
16-10 |
20-7 |
23-10 |
||
|
|
Douglas
Fir-Larch #2 |
9-10 |
14-4 |
18-2 |
22-3 |
25-9 |
8-6 |
12-5 |
15-9 |
19-3 |
22-4 |
||
|
|
Douglas
Fir-Larch #3 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
6-5 |
9-5 |
11-11 |
14-6 |
16-10 |
||
|
|
Hem-Fir SS |
9-10 |
15-6 |
20-5 |
Note a |
Note a |
9-10 |
15-6 |
19-11 |
24-4 |
Note a |
||
|
|
Hem-Fir #1 |
9-8 |
14-11 |
18-11 |
23-2 |
Note a |
8-10 |
12-11 |
16-5 |
20-0 |
23-3 |
||
|
|
Hem-Fir #2 |
9-2 |
14-2 |
17-11 |
21-11 |
25-5 |
8-5 |
12-3 |
15-6 |
18-11 |
22-0 |
||
|
|
Hem-Fir #3 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
6-5 |
9-5 |
11-11 |
14-6 |
16-10 |
||
|
16 |
|
|
|
|
|
|
|
|
|
|
|
||
|
Southern
Pine SS |
10-3 |
16-1 |
21-2 |
Note a |
Note a |
10-3 |
16-1 |
21-2 |
Note a |
Note a |
|||
|
|
|||||||||||||
|
|
Southern
Pine #1 |
10-0 |
15-9 |
20-10 |
25-10 |
Note a |
10-0 |
15-0 |
18-10 |
22-4 |
Note a |
||
|
|
Southern
Pine #2 |
|
15-1 |
19-5 |
23-2 |
Note a |
|
13-0 |
16-10 |
20-1 |
23-7 |
||
|
|
Southern
Pine #3 |
|
11-8 |
14-10 |
17-6 |
20-11 |
|
10-1 |
12-10 |
15-2 |
18-1 |
||
|
|
Spruce-Pine-Fir SS |
9-8 |
15-2 |
19-11 |
25-5 |
Note a |
9-8 |
14-10 |
18-10 |
23-0 |
Note a |
||
|
|
Spruce-Pine-Fir #1 |
9-5 |
14-4 |
18-2 |
22-3 |
25-9 |
8-6 |
12-5 |
15-9 |
19-3 |
22-4 |
||
|
|
Spruce-Pine-Fir #2 |
9-5 |
14-4 |
18-2 |
22-3 |
25-9 |
8-6 |
12-5 |
15-9 |
19-3 |
22-4 |
||
|
|
Spruce-Pine-Fir #3 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
6-5 |
9-5 |
11-11 |
14-6 |
16-10 |
||
|
|||||||||||||
(continued)
TABLE 2308.10.3(1)—continued
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Roof Live Load = 20 pounds per square foot,
Ceiling Not Attached to Rafters, L/Ä = 180)
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per
square foot = 47.9 N/m2.
a. Span exceeds 26 feet in length. Check sources for availability of lumber in
lengths greater than 20 feet.
TABLE 2308.10.3(2)
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Roof Live Load = 20 pounds per square foot,
Ceiling Attached to Rafters, L/Ä = 240)
|
RAFTER |
SPECIES AND GRADE |
DEAD LOAD = 10 pounds per square foot |
DEAD LOAD = 20 pounds per square foot |
|||||||||
|
2 × 4 |
2 × 6 |
2 × 8 |
2 × 10 |
2 × 12 |
2 × 4 |
2 × 6 |
2 × 8 |
2 × 10 |
2 × 12 |
|||
|
Maximum rafter spans |
||||||||||||
|
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
(ft. - in.) |
|||
|
|
Douglas Fir-Larch SS |
10-5 |
16-4 |
21-7 |
Note a |
Note a |
10-5 |
16-4 |
21-7 |
Note a |
Note a |
|
|
|
Douglas Fir-Larch #1 |
10-0 |
15-9 |
20-10 |
Note a |
Note a |
10-0 |
15-4 |
19-5 |
23-9 |
Note a |
|
|
|
Douglas Fir-Larch #2 |
9-10 |
15-6 |
20-5 |
25-8 |
Note a |
9-10 |
14-4 |
18-2 |
22-3 |
25-9 |
|
|
|
Douglas Fir-Larch #3 |
8-7 |
12-6 |
15-10 |
19-5 |
22-6 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
|
|
|
Hem-Fir SS |
9-10 |
15-6 |
20-5 |
Note a |
Note a |
9-10 |
15-6 |
20-5 |
Note a |
Note a |
|
|
|
Hem-Fir #1 |
9-8 |
15-2 |
19-11 |
25-5 |
Note a |
9-8 |
14-11 |
18-11 |
23-2 |
Note a |
|
|
|
Hem-Fir #2 |
9-2 |
14-5 |
19-0 |
24-3 |
Note a |
9-2 |
14-2 |
17-11 |
21-11 |
25-5 |
|
|
|
Hem-Fir #3 |
8-7 |
12-6 |
15-10 |
19-5 |
22-6 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
|
|
12 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Southern Pine SS |
10-3 |
16-1 |
21-2 |
Note a |
Note a |
10-3 |
16-1 |
21-2 |
Note a |
Note a |
||
|
|
||||||||||||
|
|
Southern Pine #1 |
10-0 |
15-9 |
20-10 |
Note a |
Note a |
10-0 |
15-9 |
20-10 |
25-10 |
Note a |
|
|
|
Southern Pine #2 |
|
15-6 |
20-5 |
Note a |
Note a |
|
15-1 |
19-5 |
23-2 |
Note a |
|
|
|
Southern Pine #3 |
|
13-6 |
17-2 |
20-3 |
24-1 |
|
11-8 |
14-10 |
17-6 |
20-11 |
|
|
|
Spruce-Pine-Fir SS |
9-8 |
15-2 |
19-11 |
25-5 |
Note a |
9-8 |
15-2 |
19-11 |
25-5 |
Note a |
|
|
|
Spruce-Pine-Fir #1 |
9-5 |
14-9 |
19-6 |
24-10 |
Note a |
9-5 |
14-4 |
18-2 |
22-3 |
25-9 |
|
|
|
Spruce-Pine-Fir #2 |
9-5 |
14-9 |
19-6 |
24-10 |
Note a |
9-5 |
14-4 |
18-2 |
22-3 |
25-9 |
|
|
|
Spruce-Pine-Fir #3 |
8-7 |
12-6 |
15-10 |
19-5 |
22-6 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
|
|
|
Douglas Fir-Larch SS |
9-6 |
14-11 |
19-7 |
25-0 |
Note a |
9-6 |
14-11 |
19-7 |
24-9 |
Note a |
|
|
|
Douglas Fir-Larch #1 |
9-1 |
14-4 |
18-11 |
23-9 |
Note a |
9-1 |
13-3 |
16-10 |
20-7 |
23-10 |
|
|
|
Douglas Fir-Larch #2 |
8-11 |
14-1 |
18-2 |
22-3 |
25-9 |
8-6 |
12-5 |
15-9 |
19-3 |
22-4 |
|
|
|
Douglas Fir-Larch #3 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
6-5 |
9-5 |
11-11 |
14-6 |
16-10 |
|
|
|
Hem-Fir SS |
8-11 |
14-1 |
18-6 |
23-8 |
Note a |
8-11 |
14-1 |
18-6 |
23-8 |
Note a |
|
|
|
Hem-Fir #1 |
8-9 |
13-9 |
18-1 |
23-1 |
Note a |
8-9 |
12-11 |
16-5 |
20-0 |
23-3 |
|
|
|
Hem-Fir #2 |
8-4 |
13-1 |
17-3 |
21-11 |
25-5 |
8-4 |
12-3 |
15-6 |
18-11 |
22-0 |
|
|
|
Hem-Fir #3 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
6-5 |
9-5 |
11-11 |
14-6 |
16-10 |
|
|
16 |
|
|
|
|
|
|
|
|
|
|
|
|
|
Southern Pine SS |
9-4 |
14-7 |
19-3 |
24-7 |
Note a |
9-4 |
14-7 |
19-3 |
24-7 |
Note a |
||
|
|
||||||||||||
|
|
Southern Pine #1 |
9-1 |
14-4 |
18-11 |
24-1 |
Note a |
9-1 |
14-4 |
18-10 |
22-4 |
Note a |
|
|
|
Southern Pine #2 |
|
14-1 |
18-6 |
23-2 |
Note a |
|
13-0 |
16-10 |
20-1 |
23-7 |
|
|
|
Southern Pine #3 |
|
11-8 |
14-10 |
17-6 |
20-11 |
|
10-1 |
12-10 |
15-2 |
18-1 |
|
|
|
Spruce-Pine-Fir SS |
8-9 |
13-9 |
18-1 |
23-1 |
Note a |
8-9 |
13-9 |
18-1 |
23-0 |
Note a |
|
|
|
Spruce-Pine-Fir #1 |
8-7 |
13-5 |
17-9 |
22-3 |
25-9 |
8-6 |
12-5 |
15-9 |
19-3 |
22-4 |
|
|
|
Spruce-Pine-Fir #2 |
8-7 |
13-5 |
17-9 |
22-3 |
25-9 |
8-6 |
12-5 |
15-9 |
19-3 |
22-4 |
|
|
|
Spruce-Pine-Fir #3 |
7-5 |
10-10 |
13-9 |
16-9 |
19-6 |
6-5 |
9-5 |
11-11 |
14-6 |
16-10 |
|
(continued)
TABLE 2308.10.3(2)—continued
RAFTER SPANS FOR COMMON LUMBER SPECIES
(Roof Live Load = 20 pounds per square foot,
Ceiling Attached to Rafters, L/Ä = 240)
For SI: 1 inch = 25.4 mm, 1 foot = 304.8 mm, 1 pound per
square foot = 47.9 N/m2.
a. Span exceeds 26 feet in length. Check sources for availability of lumber in
lengths greater than 20 feet.
Fiscal Impact Statement [Provide documentation of the costs and benefits of
the proposed modifications to the code for each of the following entities. Cost data should be accompanied by a list of
assumptions and supporting documentation.
Explain expected benefits.]:
A. Impact to local entity
relative to enforcement of code:
No impact to local entity relative to
enforcement of code.
B. Impact to building and
property owners relative to cost of compliance with code:
Negligible impact on building and property owners relative to cost of
compliance with the code.
C. Impact to industry
relative to cost of compliance with code:
These changes will affect design and use of certain wood structural members. The impact is difficult to determine because designer preferences come into play. Nonetheless, adjustment of design values can be expected to have some impact throughout the supply chain if product substitution occurs, and the industry has provided recommendations to minimize the impact.
Rationale [Provide an explanation of why you would like this Proposed Modification to the Florida Building Code.]: In response to recent grading agency requests and after evaluation of applicable testing programs and results, the American Lumber Standards Committee has certified new design values for Southern Pine 2x4s, No. 2 and lower grades, effective June 1, 2012 (2x4s only). These modifications are needed to reflect these new design values. Comprehensive information about the need for and application of the new design values can be found at the websites of the Southern Pine Inspection Bureau and the Southern Forest Products Association (www.spib.org, and www.southernpine.com).
Please explain how the proposed modification meets the
following requirements:
1.
Has a reasonable and substantial
connection with the health, safety, and welfare of the general public: The use of the new design values is important
for determining allowable spans of certain structural members.
2.
Strengthens or improves the code, and
provides equivalent or better products, methods, or systems of construction: Provides more accuracy in determining
allowable spans.
3.
Does not discriminate against materials,
products, methods, or systems of construction of demonstrated capabilities: Does not discriminate.
4.
Does not degrade the effectiveness of the
code: This improves the
effectiveness of the codes.
5. The
provisions contained in the proposed amendment are addressed in the applicable
international code. These are being addressed in similar fashion
in the model codes.
6.
The
amendment demonstrates by evidence or data that the geographical jurisdiction
of Florida exhibits a need to strengthen the foundation code beyond the needs
or regional variations addressed by the foundation code, and why the proposed
amendment applies to this state. This
would apply everywhere.
7. The proposed amendment was submitted or
attempted to be included in the foundation codes to avoid resubmission to the
Florida Building Code amendment process.
Because of the nature of the needed change and the timing, it was
not possible to address this previously in the model codes. It is currently being addressed.
8. Impact on small business: These changes will affect design and use
of certain wood structural members. The impact on small businesses is
difficult to determine as externalities such as designer preferences come into
play. Nonetheless, adjustment of design values can be expected to have
some impact throughout the supply chain if product substitution occurs, and the
industry has provided recommendations to minimize the impact. At present,
the financial impact on small businesses is unknown.