City of Aurora
SINGLE-FAMILY DETACHED GARAGE
AND ADDITIONS
Permit Center • 15151 E. Alameda Parkway, Ste. 2400 • Aurora, CO 80012 • 303-739-7420 • Email: [email protected]
RAFTER TABLE
RAFTER SIZE
RAFTER SPACING
MAXIMUM SPAN
2” X 4”
12” ON CENTER
16” ON CENTER
8’ - 10”
8’ - 0”
24” ON CENTER
6’ - 7”
12” ON CENTER
13’ - 7”
16” ON CENTER
11’ - 9”
24” ON CENTER
9’ - 7”
2” X 6”
2” X 8”
2” X 10”
2” X 12”
12” ON CENTER
17’ - 2”
16” ON CENTER
14’ - 11”
24” ON CENTER
12’ - 2”
12” ON CENTER
21’ - 0”
16” ON CENTER
18’ - 2”
24” ON CENTER
14’ - 10”
12” ON CENTER
24’ - 4”
16” ON CENTER
21’ - 1”
24” ON CENTER
17’ - 3”
Spans in this table were derived from the IRC and the Span Master calculator.
Design Criteria: Hem-Fir #2 rafters with a live/dead load of 30/10 psf. DOL 1.15; L / 180.
ROOF BEAM TABLE
BEAM SPAN BETWEEN SUPPORTS ( SPACING OF POSTS)
Rafter Span
4’
5’
6’
7’
8’
9’
10’
11’
12’
4’
2-2x4
2-2x4
2-2x4
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x6
5’
2-2x4
2-2x4
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x6
2-2x8
6’
2-2x4
2-2x4
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
7’
2-2x4
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
2-2x8
8’
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
2-2x8
2-2x10
9’
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
10’
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
11’
2-2x4
2-2x4
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
12’
2-2x4
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
Design Criteria: Hem-Fir #2 beam members with a live/dead loading of 30/10 psf.
DOL 1.15; L / 240. (Derived from Span Master)
Single Family Detached Garage & Additions (Revised 11/2015)
CEILING JOIST TABLE
JOIST SIZE
JOIST SPACING
MAXIMUM SPAN
2” X 4”
12” ON CENTER
16” ON CENTER
11’ - 7”
10’ - 6”
24” ON CENTER
9’ - 2”
12” ON CENTER
18’ - 2”
16” ON CENTER
16’ - 6”
24” ON CENTER
14’ - 5”
12” ON CENTER
24’ - 0”
16” ON CENTER
21’ - 9”
24” ON CENTER
18’ - 6”
2” X 6”
2” X 8”
2” X 10”
2” X 12”
12” ON CENTER
30’ - 7”
16” ON CENTER
27’ - 8”
24” ON CENTER
22’ - 7”
12” ON CENTER
37’ - 1”
16” ON CENTER
32’ - 1”
24” ON CENTER
26’ - 3”
Spans in this table were derived from the IRC and the Span Master calculator.
Design Criteria: Hem-Fir #2 supporting drywall ceiling and live/dead loading of 10/5 psf.
DOL 1.00; L/240. (Uninhabitable attics without storage)
CEILING JOIST TABLE WITH LIMITED STORAGE
JOIST SIZE
JOIST SPACING
MAXIMUM SPAN
2” X 4”
12” ON CENTER
16” ON CENTER
9’ - 2”
8’ - 4”
24” ON CENTER
7’ - 1”
12” ON CENTER
14’ - 5”
16” ON CENTER
12’ - 8”
24” ON CENTER
10’ - 4”
12” ON CENTER
18’ - 6”
16” ON CENTER
16’ - 0”
24” ON CENTER
13’ - 1”
2” X 6”
2” X 8”
2” X 10”
2” X 12”
12” ON CENTER
22’ - 7”
16” ON CENTER
19’ - 7”
24” ON CENTER
16’ - 0”
12” ON CENTER
28’ - 9”
16” ON CENTER
22’ - 8”
24” ON CENTER
20’ - 4”
Spans in this table were derived from the IRC and the Span Master calculator.
Design Criteria: Hem-Fir #2 supporting drywall ceiling and live/dead loading of 10/5 psf.
DOL 1.00; L/240. (Uninhabitable attics without storage)
FLOOR JOIST TABLE
JOIST SIZE
JOIST SPACING
MAXIMUM SPAN
2” X 6”
12” ON CENTER
16” ON CENTER
10’ - 0”
9’ - 1”
2” X 8”
2” X 10”
2” X 12”
19.2” ON CENTER
8’ - 7”
24” ON CENTER
7’ - 11”
12” ON CENTER
13’ - 2”
16” ON CENTER
12’ - 0”
19.2” ON CENTER
11’ - 3”
24” ON CENTER
10’ - 2”
12” ON CENTER
16’ - 10”
16” ON CENTER
15’ - 2”
19.2” ON CENTER
13’ - 10”
24” ON CENTER
12’ - 5”
12” ON CENTER
20’ - 4”
16” ON CENTER
17’ - 7”
19.2” ON CENTER
16’ - 1”
24” ON CENTER
14’ - 4”
Spans in this Spans in this table were derived from the IRC Table R502.3.1 (2)
Design Criteria: Hem–Fir # 2 joists with a live/dead load of 40/10 psf. DOL 1.00; L / 360.
FLOOR BEAM TABLE
BEAM SPAN BETWEEN SUPPORTS ( SPACING OF POSTS)
Joist Span
4’
5’
6’
7’
8’
9’
10’
11’
12’
4’
2-2x4
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
5’
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
6’
2-2x4
2-2x4
2-2x6
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
7’
2-2x4
2-2x4
2-2x6
2-2x6
2-2x8
2-2x8
2-2x8
2-2x10
2-2x10
8’
2-2x4
2-2x4
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
9’
2-2x4
2-2x6
2-2x6
2-2x6
2-2x8
2-2x10
2-2x10
2-2x12
2-2x12
10’
2-2x4
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
2-2x10
2-2x12
3-2x10
11’
2-2x4
2-2x6
2-2x6
2-2x8
2-2x8
2-2x10
2-2x12
2-2x12
3-2x10
12’
2-2x4
2-2x6
2-2x6
2-2x8
2-2x10
2-2x10
2-2x12
3-2x10
3-2x10
Design Criteria: Hem-Fir # 2 beam members with a live/dead loading of 40/10 psf.
DOL 1.00; L / 360