Open Joist Span Tables

Choose your edition

Maximum Allowable Spans – US Edition​

Glued & Nailed Subfloor
ΔL ≤ L/480​

Span tables menu (US Edition):

• Live load: 40 psf / Dead Load: 15 psf / Depth: 11 7/8″ – span table
• Live load: 40 psf / Dead Load: 15 psf / Depth: 14″ – span table
• Live load: 40 psf / Dead Load: 15 psf / Depth: 16″ – span table
• Live load: 40 psf / Dead Load: 25 psf / Depth: 11 7/8″ – span table
• Live load: 40 psf / Dead Load: 25 psf / Depth: 14″ – span table
• Live load: 40 psf / Dead Load: 25 psf / Depth: 16″ – span table
• Live load: 100 psf / Dead Load: 15 psf / Depth: 11 7/8″ – span table
• Live load: 100 psf / Dead Load: 15 psf / Depth: 14″ – span table
• Live load: 100 psf / Dead Load: 15 psf / Depth: 16″ – span table
• Notes

Live load: 40 psf / Dead Load: 15 psf / Depth: 11 7/8″ – Span table

Live load		40 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	12′-0″	12′-0″
14′-0″		14′-0″	14′-0″	14′-0″	14′-0″
16′-0″		16′-0″	16′-0″	16′-0″	14′-10″
18′-0″	OJ315 (3×2)	18′-0″	18′-0″	17′-6″	16′-4″
	OJ418S(9) (4×2)	18′-0″	18′-0″	18′-0″	18′-0″
20′-0″	OJ415 (4×2)	20′-0″	20′-0″	19′-5″	18′-2″
	OJ418S(9) (4×2)	20′-0″	20′-0″	20′-0″	19′-1″
22′-0″	OJ418 (4×2)	22′-0″	21′-9″	20′-6″	—–

Live load: 40 psf / Dead Load: 15 psf / Depth: 14″ – Span table

Live load		40 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	12′-0″	12′-0″
14′-0″		14′-0″	14′-0″	14′-0″	14′-0″
16′-0″		16′-0″	16′-0″	16′-0″	16′-0″
18′-0″	OJ315 (3×2)	18′-0″	18′-0″	18′-0″	18′-0″
20′-0″	OJ315 (3×2)	20′-0″	20′-0″	19′-10″	—–
	OJ418S(9) (4×2)	20′-0″	20′-0″	20′-0″	20′-0″
22′-0″	OJ415 (4×2)	22′-0″	22′-0″	22′-0″	20′-7″
24′-0″	OJ418 (4×2)	24′-0″	24′-0″	23′-3″	—–
26′-0″		26′-0″	24′-9″	—–	—–

Live load: 40 psf / Dead Load: 15 psf / Depth: 16″ – Span table

Live load		40 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	12′-0″	12′-0″
14′-0″		14′-0″	14′-0″	14′-0″	14′-0″
16′-0″		16′-0″	16′-0″	16′-0″	16′-0″
18′-0″	OJ315 (3×2)	18′-0″	18′-0″	18′-0″	18′-0″
20′-0″	OJ315 (3×2)	20′-0″	20′-0″	20′-0″	19′-3″
	OJ418S(9) (4×2)	20′-0″	20′-0″	20′-0″	20′-0″
22′-0″	OJ418 (4×2)	22′-0″	22′-0″	22′-0″	22′-0″
24′-0″		24′-0″	24′-0″	24′-0″	24′-0″
26′-0″		26′-0″	26′-0″	25′-8″	—–
28′-0″	OJ420 (4×2)	28′-0″	28′-0″	26′-6″	—–
30′-0″		30′-0″	28′-2″	—–	—–

Live load: 40 psf / Dead Load: 25 psf / Depth: 11 7/8″ – Span table

Live load		40 psf
Dead load		25 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	12′-0″	12′-0″
14′-0″		14′-0″	14′-0″	14′-0″	13′-7″
16′-0″		16′-0″	16′-0″	15′-3″	—–
18′-0″	OJ315 (3×2)	18′-0″	18′-0″	16′-9″	—–
	OJ418S(9) (4×2)	18′-0″	18′-0″	18′-0″	18′-0″
20′-0″	OJ415 (3×2)	20′-0″	20′-0″	19′-5″	—–
	OJ418S(9) (4×2)	20′-0″	20′-0″	20′-0″	19′-1″
22′-0″	OJ418 (4×2)	22′-0″	21′-9″	20′-6″	—–

Live load: 40 psf / Dead Load: 25 psf / Depth: 14″ – Span table

Live load		40 psf
Dead load		25 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	12′-0″	12′-0″
14′-0″		14′-0″	14′-0″	14′-0″	14′-0″
16′-0″		16′-0″	16′-0″	16′-0″	14′-11″
18′-0″	OJ315 (3×2)	18′-0″	18′-0″	18′-0″	16′-5″
20′-0″	OJ315 (3×2)	20′-0″	20′-0″	18′-5″	—–
	OJ418S(9) (4×2)	20′-0″	20′-0″	20′-0″	20′-0″
22′-0″	OJ415 (4×2)	22′-0″	22′-0″	22′-0″	—–
24′-0″	OJ418 (4×2)	24′-0″	24′-0″	23′-3″	—–
26′-0″		26′-0″	24′-9″	—–	—–

Live load: 40 psf / Dead Load: 25 psf / Depth: 16″ – Span table

Live load		40 psf
Dead load		25 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	12′-0″	12′-0″
14′-0″		14′-0″	14′-0″	14′-0″	14′-0″
16′-0″		16′-0″	16′-0″	16′-0″	16′-0″
18′-0″	OJ315 (3×2)	18′-0″	18′-0″	18′-0″	17′-9″
20′-0″	OJ315 (3×2)	20′-0″	20′-0″	19′-10″	—–
	OJ418S(9) (4×2)	20′-0″	20′-0″	20′-0″	20′-0″
22′-0″	OJ418 (4×2)	22′-0″	22′-0″	22′-0″	20′-9″
24′-0″		24′-0″	24′-0″	24′-0″	—–
26′-0″		26′-0″	26′-0″	25′-8″	—–
28′-0″	OJ420 (4×2)	28′-0″	28′-0″	25′-11″	—–
30′-0″		30′-0″	28′-2″	—–	—–

Live load: 100 psf / Dead Load: 15 psf / Depth: 11 7/8″ – Span table

Live load		100 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	11′-5″	10′-3″
14′-0″		14′-0″	12′-7″	—–	—–
16′-0″		14′-3″	—–	—–	—–
18′-0″	OJ315 (3×2)	—–	—–	—–	—–
	OJ418S(9) (4×2)	17′-2″	—–	—–	—–
20′-0″	OJ415 (4×2)	—–	—–	—–	—–
	OJ418S(9) (4×2)	—–	—–	—–	—–
22′-0″	OJ418 (4×2)	—–	—–	—–	—–

Live load: 100 psf / Dead Load: 15 psf / Depth: 14″ – Span table

Live load		100 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	12′-0″	11′-2″
14′-0″		14′-0″	13′-9″	12′-6″	—–
16′-0″		16′-0″	—–	—–	—–
18′-0″	OJ315 (3×2)	16′-7″	—–	—–	—–
20′-0″	OJ315 (3×2)	—–	—–	—–	—–
	OJ418S(9) (4×2)	19′-6″	—–	—–	—–
22′-0″	OJ415 (4×2)	—–	—–	—–	—–
24′-0″	OJ418 (4×2)	—–	—–	—–	—–
26′-0″		—–	—–	—–	—–

Live load: 100 psf / Dead Load: 15 psf / Depth: 16″ – Span table

Live load		100 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[7]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c.
8′-0″	OJ314 (3×2)	8′-0″	8′-0″	8′-0″	8′-0″
10′-0″		10′-0″	10′-0″	10′-0″	10′-0″
12′-0″		12′-0″	12′-0″	12′-0″	11′-8″
14′-0″		14′-0″	14′-0″	13′-4″	—–
16′-0″		16′-0″	14′-8″	—–	—–
18′-0″	OJ315 (3×2)	18′-0″	16′-4″	—–	—–
20′-0″	OJ315 (3×2)	18′-4″	—–	—–	—–
	OJ418S(9) (4×2)	20′-0″	—–	—–	—–
22′-0″	OJ418 (4×2)	21′-7″	—–	—–	—–
24′-0″		—–	—–	—–	—–
26′-0″		—–	—–	—–	—–
28′-0″	OJ420 (4×2)	—–	—–	—–	—–
30′-0″		—–	—–	—–	—–

Live load				40 psf				40 psf				100 psf
Dead load				15 psf				25 psf				15 psf
spacing				12″	16″	19.2″	24″	12″	16″	19.2″	24″	12″	16″	19.2″	24″
Subfloor[7]				19/32″			23/32″	19/32″			23/32″	19/32″			23/32″
Depth	Lengh	Series		Maximum floor span o.c.
11 7/8	8′-0″	OJ314	3×2	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″
	10′-0″			10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″
	12′-0″			12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	11′-5″	10′-3″
	14′-0″			14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	13′-7″	14′-0″	12′-7″	—–	—–
	16′-0″			16′-0″	16′-0″	16′-0″	14′-10″	16′-0″	16′-0″	15′-3″	—–	14′-3″	—–	—–	—–
	18′-0″	OJ315	3×2	18′-0″	18′-0″	17′-6″	16′-4″	18′-0″	18′-0″	16′-9″	—–	—–	—–	—–	—–
		OJ418S(9)	4×2	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	17′-2″	—–	—–	—–
	20′-0″	OJ415	4×2	20′-0″	20′-0″	19′-5″	18′-2″	20′-0″	20′-0″	19′-5″	—–	—–	—–	—–	—–
		OJ418S(9)	4×2	20′-0″	20′-0″	20′-0″	19′-1″	20′-0″	20′-0″	20′-0″	19′-1″	—–	—–	—–	—–
	22′-0″	OJ418	4×2	22′-0″	21′-9″	20′-6″	—–	22′-0″	21′-9″	20′-6″	—–	—–	—–	—–	—–
14	8′-0″	OJ314	3×2	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″
	10′-0″			10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″
	12′-0″			12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	11′-2″
	14′-0″			14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	13′-9″	12′-6″	—–
	16′-0″			16′-0″	16′-0″	16′-0″	16′-0″	16′-0″	16′-0″	16′-0″	14′-11″	16′-0″	—–	—–	—–
	18′-0″	OJ315	3×2	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	16′-5″	16′-7″	—–	—–	—–
	20′-0″	OJ315	3×2	20′-0″	20′-0″	19′-10″	—–	20′-0″	20′-0″	18′-5″	—–	—–	—–	—–	—–
		OJ418S(9)	4×2	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	19′-6″	—–	—–	—–
	22′-0″	OJ415	4×2	22′-0″	22′-0″	22′-0″	20′-7″	22′-0″	22′-0″	22′-0″	—–	—–	—–	—–	—–
	24′-0″	OJ418	4×2	24′-0″	24′-0″	23′-3″	—–	24′-0″	24′-0″	23′-3″	—–	—–	—–	—–	—–
	26′-0″			26′-0″	24′-9″	—–	—–	26′-0″	24′-9″	—–	—–	—–	—–	—–	—–
16	8′-0″	OJ314	3×2	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″	8′-0″
	10′-0″			10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″	10′-0″
	12′-0″			12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	12′-0″	11′-8″
	14′-0″			14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	14′-0″	13′-4″	—–
	16′-0″			16′-0″	16′-0″	16′-0″	16′-0″	16′-0″	16′-0″	16′-0″	16′-0″	16′-0″	14′-8″	—–	—–
	18′-0″	OJ315	3×2	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	18′-0″	17′-9″	18′-0″	16′-4″	—–	—–
	20′-0″	OJ315	3×2	20′-0″	20′-0″	20′-0″	19′-3″	20′-0″	20′-0″	19′-10″	—–	18′-4″	—–	—–	—–
		OJ418S(9)	4×2	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	20′-0″	—–	—–	—–
	22′-0″	OJ418	4×2	22′-0″	22′-0″	22′-0″	22′-0″	22′-0″	22′-0″	22′-0″	20′-9″	21′-7″	—–	—–	—–
	24′-0″			24′-0″	24′-0″	24′-0″	24′-0″	24′-0″	24′-0″	24′-0″	—–	—–	—–	—–	—–
	26′-0″			26′-0″	26′-0″	25′-8″	—–	26′-0″	26′-0″	25′-8″	—–	—–	—–	—–	—–
	28′-0″	OJ420	4×2	28′-0″	28′-0″	26′-6″	—–	28′-0″	28′-0″	25′-11″	—–	—–	—–	—–	—–
	30′-0″			30′-0″	28′-2″	—–	—–	30′-0″	28′-2″	—–	—–	—–	—–	—–	—–

Notes:

1. The indicated spans are based on simple span joists.
2. Minimum end bearing length is 1½”, spans in bold require web stiffeners at OSB end panel.
3. Maximum spans are measured centerline to centerline of bearing and are based on uniformly loaded joists.
4. Total Load deflection is limited to L/240.
5. Live Load deflection is limited to L/480.
6. The indicated spans are based on the Allowable Stress Design method as per NDS, ICC IBC/IRC code.
7. The considered subfloor is a “20 oc APA rated panel” for joist’s spacing of 12″, 16″ and 19.2″ o.c. and is a “24 oc APA rated panel” for joist’s spacing of 24″ o.c. The subfloor must be glued as per APA Specification AFG-01 or ASTM D3498 and nailed as per NDS, ICC IBC/IRC code.
8. Refer to appropriate sections of the Specifier Guide for installation guidelines and construction details.
9. S = Limited inventory. Please contact your representative to determine quantities.

Maximum Allowable Spans – Canadian Edition

Glued & Nailed Subfloor with strongbacks / ceiling optional
ΔL ≤ L/360

Span tables menu (Canadian Edition):

• Live load: 40 psf / Dead Load: 15 psf / Depth: 11 7/8″ – span table
• Live load: 40 psf / Dead Load: 15 psf / Depth: 14″ – span table
• Live load: 40 psf / Dead Load: 15 psf / Depth: 16″ – span table
• Live load: 40 psf / Dead Load: 36 psf / Depth: 11 7/8″ – span table
• Live load: 40 psf / Dead Load: 36 psf / Depth: 14″ – span table
• Live load: 40 psf / Dead Load: 36 psf / Depth: 16″ – span table
• Live load: 100 psf / Dead Load: 15 psf / Depth: 11 7/8″ – span table
• Live load: 100 psf / Dead Load: 15 psf / Depth: 14″ – span table
• Live load: 100 psf / Dead Load: 15 psf / Depth: 16″ – span table
• Notes

Live load: 40 psf / Dead Load: 15 psf / Depth: 11 7/8″ – Span table

Live load		40 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	12′-0″ None	12′-0″ None
14′-0″		14′-0″ None	14′-0″ None	14′-0″ None	14′-0″ None
16′-0″		16′-0″ None	16′-0″ 1 – 2×4	16′-0″ 1 – 2×4	15′-4″ 1 – 2×4
18′-0″	OJ315 (3×2)	18′-0″ 1 – 2×4	18′-0″ 1 – 2×6	18′-0″ 1 – 2×6	16′-11″ 1 – 2×6
	OJ418S(10) (4×2)	18′-0″ None	18′-0″ 1 – 2×4	18′-0″ 1 – 2×4	18′-0″ 2 – 2×4
20′-0″	OJ415 (4×2)	20′-0″ 2 – 2×4	20′-0″ 1 – 2×6	20′-0″ 2 – 2×6	19′-1″ 2 – 2×6
	OJ418S(10) (4×2)	20′-0″ 1 – 2×4	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6	20′-0″ 2 – 2×6
22′-0″	OJ418 (4×2)	22′-0″ 1 – 2×6	22′-0″ 2 – 2×6	22′-0″ 2 – 2×8	20′-2″ 1 – 2×8

Live load: 40 psf / Dead Load: 15 psf / Depth: 14″ – Span table

Live load		40 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	12′-0″ None	12′-0″ None
14′-0″		14′-0″ None	14′-0″ None	14′-0″ None	14′-0″ None
16′-0″		16′-0″ None	16′-0″ None	16′-0″ None	16′-0″ None
18′-0″	OJ315 (3×2)	18′-0″ None	18′-0″ 1 – 2×6	18′-0″ 1 – 2×6	18′-0″ 1 – 2×6
20′-0″	OJ315 (3×2)	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6	20′-0″ 2 – 2×6	18′-7″ 1 – 2×6
	OJ418S(10) (4×2)	20′-0″ None	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6
22′-0″	OJ415 (4×2)	22′-0″ 1 – 2×6	22′-0″ 1 – 2×6	22′-0″ 2 – 2×6	21′-8″ 1 – 2×8
24′-0″	OJ418 (4×2)	24′-0″ 1 – 2×6	24′-0″ 2 – 2×6	24′-0″ 2 – 2×8	22′-11″ 2 – 2×8
26′-0″		26′-0″ 2 – 2×6	26′-0″ 2 – 2×8	24′-10″ 2 – 2×8	—–

Live load: 40 psf / Dead Load: 15 psf / Depth: 16″ – Span table

Live load		40 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	12′-0″ None	12′-0″ None
14′-0″		14′-0″ None	14′-0″ None	14′-0″ None	14′-0″ None
16′-0″		16′-0″ None	16′-0″ None	16′-0″ None	16′-0″ None
18′-0″	OJ315 (3×2)	18′-0″ None	18′-0″ None	18′-0″ 1 – 2×6	18′-0″ 1 – 2×6
20′-0″	OJ315 (3×2)	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6
	OJ418S(10) (4×2)	20′-0″ None	20′-0″ None	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6
22′-0″	OJ418 (4×2)	22′-0″ None	22′-0″ 1 – 2×6	22′-0″ 1 – 2×6	22′-0″ 1 – 2×6
24′-0″		24′-0″ 1 – 2×6	24′-0″ 1 – 2×6	24′-0″ 2 – 2×6	24′-0″ 2 – 2×6
26′-0″		26′-0″ 1 – 2×6	26′-0″ 1 – 2×6	26′-0″ 1 – 2×8	25′-5″ 2 – 2×8
28′-0″	OJ420 (4×2)	28′-0″ 2 – 2×6	28′-0″ 2 – 2×8	28′-0″ 1 – 2×10	26′-3″ 2 – 2×8
30′-0″		30′-0″ 2 – 2×8	30′-0″ 2 – 2×10	28′-6″ 2 – 2×10	—–

Live load: 40 psf / Dead Load: 36 psf / Depth: 11 7/8″ – Span table

Live load		40 psf
Dead load		36 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	12′-0″ None	12′-0″ None
14′-0″		14′-0″ None	14′-0″ None	14′-0″ None	13′-3″ None
16′-0″		16′-0″ None	16′-0″ 1 – 2×4	14′-10″ None	—–
18′-0″	OJ315 (3×2)	18′-0″ 1 – 2×4	18′-0″ 1 – 2×6	16′-5″ 1 – 2×4	—–
	OJ418S(10) (4×2)	18′-0″ None	18′-0″ 1 – 2×4	18′-0″ 1 – 2×4	16′-8″ 1 – 2×4
20′-0″	OJ415 (4×2)	20′-0″ 2 – 2×4	20′-0″ 1 – 2×6	19′ – 5″ 2-2×6	—–
	OJ418S(10) (4×2)	20′-0″ 1 – 2×4	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6	—–
22′-0″	OJ418 (4×2)	22′-0″ 1 – 2×6	22′-0″ 2 – 2×6	20′-10″ 2 – 2×6	—–

Live load: 40 psf / Dead Load: 36 psf / Depth: 14″ – Span table

Live load		40 psf
Dead load		36 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	12′-0″ None	12′-0″ None
14′-0″		14′-0″ None	14′-0″ None	14′-0″ None	14′-0″ None
16′-0″		16′-0″ None	16′-0″ None	16′-0″ None	14′-6″ None
18′-0″	OJ315 (3×2)	18′-0″ None	18′-0″ 1 – 2×6	18′-0″ 1 – 2×6	16′-1″ None
20′-0″	OJ315 (3×2)	20′-0″ 1 – 2×6	19′-9″ 1 – 2×6	—–	—–
	OJ418S(10) (4×2)	20′-0″ None	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6	—–
22′-0″	OJ415 (4×2)	22′-0″ 1 – 2×6	22′-0″ 1 – 2×6	21′-4″ 2 – 2×6	—–
24′-0″	OJ418 (4×2)	24′-0″ 1 – 2×6	24′-0″ 2 – 2×6	22′-4″ 2 – 2×6	—–
26′-0″		26′-0″ 2 – 2×6	25′-1″ 2 – 2×8	—–	—–

Live load: 40 psf / Dead Load: 36 psf / Depth: 16″ – Span table

Live load		40 psf
Dead load		36 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	12′-0″ None	12′-0″ None
14′-0″		14′-0″ None	14′-0″ None	14′-0″ None	14′-0″ None
16′-0″		16′-0″ None	16′-0″ None	16′-0″ None	15′-6″ None
18′-0″	OJ315 (3×2)	18′-8″ None	18′-8″ None	18′-8″ 1 – 2×6	17′-4″ None
20′-0″	OJ315 (3×2)	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6	19′-5″ 1 – 2×6	—–
	OJ418S(10) (4×2)	20′-0″ None	20′-0″ None	20′-0″ 1 – 2×6	20′-0″ 1 – 2×6
22′-0″	OJ418 (4×2)	22′-0″ None	22′-0″ 1 – 2×6	22′-0″ 1 – 2×6	20′-2″ 1 – 2×6
24′-0″		24′-0″ 1 – 2×6	24′-0″ 1 – 2×6	24′-0″ 2 – 2×6	—–
26′-0″		26′-0″ 1 – 2×6	26′-0″ 2 – 2×6	25′-3″ 2 – 2×6	—–
28′-0″	OJ420 (4×2)	28′-0″ 2 – 2×6	28′-0″ 2 – 2×8	—–	—–
30′-0″		30′-0″ 2 – 2×8	28′-8″ 2 – 2×8	—–	—–

Live load: 100 psf / Dead Load: 15 psf / Depth: 11 7/8″ – Span table

Live load		100 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	11′-8″ None	10′-3″ None
14′-0″		14′-0″ None	12′-10″ None	—–	—–
16′-0″		14′-10″ None	—–	—–	—–
18′-0″	OJ315 (3×2)	—–	—–	—–	—–
	OJ418S(10) (3×2)	18′-0″ None	—–	—–	—–
20′-0″	OJ415 (4×2)	—–	—–	—–	—–
	OJ418S(10) (3×2)	18′-7″ 1 – 2×4	—–	—–	—–
22′-0″	OJ418 (3×2)	—–	—–	—–	—–

Live load: 100 psf / Dead Load: 15 psf / Depth: 14″ – Span table

Live load		100 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	12′-0″ None	11′-0″ None
14′-0″		14′-0″ None	14′-0″ None	12′ – 10″ None	—–
16′-0″		16′-0″ None	—–	—–	—–
18′-0″	OJ315 (3×2)	17′-9″ None	—–	—–	—–
20′-0″	OJ315 (3×2)	—–	—–	—–	—–
	OJ418S(10) (4×2)	20′-0″ None	—–	—–	—–
22′-0″	OJ415 (4×2)	—–	—–	—–	—–
24′-0″	OJ418 (4×2)	—–	—–	—–	—–
26′-0″		—–	—–	—–	—–

Live load: 100 psf / Dead Load: 15 psf / Depth: 16″ – Span table

Live load		100 psf
Dead load		15 psf
spacing		12″	16″	19.2″	24″
Subfloor[9]		19/32″			23/32″
Lengh	Series	Maximum floor span o.c. Required Strongback[1]
8′-0″	OJ314 (3×2)	8′-0″ None	8′-0″ None	8′-0″ None	8′-0″ None
10′-0″		10′-0″ None	10′-0″ None	10′-0″ None	10′-0″ None
12′-0″		12′-0″ None	12′-0″ None	12′-0″ None	12′-0″ None
14′-0″		14′-0″ None	14′-0″ None	13′-8″ None	12′-2″ None
16′-0″		16′-0″ None	14′-11″ None	—–	—–
18′-0″	OJ315 (3×2)	18′-0″ None	16′-9″ None	—–	—–
20′-0″	OJ315 (3×2)	19′-4″ None	—–	—–	—–
	OJ418S(10) (4×2)	20′-0″ None	18′-10″ None	—–	—–
22′-0″	OJ418 (4×2)	22′-0″ None	—–	—–	—–
24′-0″		23′-5″ 1 – 2×6	—–	—–	—–
26′-0″		—–	—–	—–	—–
28′-0″	OJ420 (4×2)	—–	—–	—–	—–
30′-0″		—–	—–	—–	—–

Live load				40 psf				40 psf				100 psf
Dead load				15 psf				36 psf				15 psf
spacing				12″	16″	19.2″	24″	12″	16″	19.2″	24″	12″	16″	19.2″	24″
Subfloor[9]				19/32″			23/32″	19/32″			23/32″	19/32″			23/32″
Depth	Lengh	Series		Maximum span o.c. Required Strongback[1]
11 7/8	8′ – 0″	OJ314	3×2	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None
	10′ – 0″			10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None
	12′ – 0″			12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	11′ – 8″ None	10′ – 3″ None
	14′ – 0″			14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	13′ – 3″ None	14′ – 0″ None	12′ – 10″ None	—–	—–
	16′ – 0″			16′ – 0″ None	16′ – 0″ 1 – 2×4	16′ – 0″ 1 – 2×4	15′ – 4″ 1 – 2×4	16′ – 0″ None	16′ – 0″ 1 – 2×4	14′ – 10″ None	—–	14′ – 10″ None	—–	—–	—–
	18′ – 0″	OJ315	3×2	18′ – 0″ 1 – 2×4	18′ – 0″ 1 – 2×6	18′ – 0″ 1 – 2×6	16′ – 11″ 1 – 2×6	18′ – 0″ 1 – 2×4	18′ – 0″ 1 – 2×6	16′ – 5″ 1 – 2×4	—–	—–	—–	—–	—–
		OJ418S(10)	4×2	18′ – 0″ None	18′ – 0″ 1 – 2×4	18′ – 0″ 1 – 2×4	18′ – 0″ 2 – 2×4	18′ – 0″ None	18′ – 0″ 1 – 2×4	18′ – 0″ 1 – 2×4	16′ – 8″ 1 – 2×4	18′ – 0″ None	—–	—–	—–
	20′ – 0″	OJ415	4×2	20′ – 0″ 2 – 2×4	20′ – 0″ 1 – 2×6	20′ – 0″ 2 – 2×6	19′ – 1″ 2 – 2×6	20′ – 0″ 2 – 2×4	20′ – 0″ 1 – 2×6	19′ – 5″ 2 – 2×6	—–	—–	—–	—–	—–
		OJ418S(10)	4×2	20′ – 0″ 1 – 2×4	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ 2 – 2×6	20′ – 0″ 1 – 2×4	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	—–	18′ – 7″ 1 – 2×4	—–	—–	—–
	22′ – 0″	OJ418	4×2	22′ – 0″ 1 – 2×6	22′ – 0″ 2 – 2×6	22′ – 0″ 2 – 2×8	20′ – 2″ 1 – 2×8	22′ – 0″ 1 – 2×6	22′ – 0″ 2 – 2×6	20′ – 10″ 2 – 2×6	—–	—–	—–	—–	—–
14	8′ – 0″	OJ314	3×2	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None
	10′ – 0″			10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None
	12′ – 0″			12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	11′ – 0″ None
	14′ – 0″			14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	12′ – 10″ None	—–
	16′ – 0″			16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	14′ – 6″ None	16′ – 0″ None	—–	—–	—–
	18′ – 0″	OJ315	3×2	18′ – 0″ None	18′ – 0″ 1 – 2×6	18′ – 0″ 1 – 2×6	18′ – 0″ 1 – 2×6	18′ – 0″ None	18′ – 0″ 1 – 2×6	18′ – 0″ 1 – 2×6	16′ – 1″ None	17′ – 9″ None	—–	—–	—–
	20′ – 0″	OJ315	3×2	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ 2 – 2×6	18′ – 7″ 1 – 2×6	20′ – 0″ 1 – 2×6	19′ – 9″ 1 – 2×6	—–	—–	—–	—–	—–	—–
		OJ418S(10)	4×2	20′ – 0″ None	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ None	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	—–	20′ – 0″ None	—–	—–	—–
	22′ – 0″	OJ415	4×2	22′ – 0″ 1 – 2×6	22′ – 0″ 1 – 2×6	22′ – 0″ 2 – 2×6	21′ – 8″ 1 – 2×8	22′ – 0″ 1 – 2×6	22′ – 0″ 1 – 2×6	21′ – 4″ 2 – 2×6	—–	—–	—–	—–	—–
	24′ – 0″	OJ418	4×2	24′ – 0″ 1 – 2×6	24′ – 0″ 2 – 2×6	24′ – 0″ 2 – 2×8	22′ – 11″ 2 – 2×8	24′ – 0″ 1 – 2×6	24′ – 0″ 2 – 2×6	22′ – 4″ 2 – 2×6	—–	—–	—–	—–	—–
	26′ – 0″			26′ – 0″ 2 – 2×6	26′ – 0″ 2 – 2×8	24′ – 10″ 2 – 2×8	—–	26′ – 0″ 2 – 2×6	25′ – 1″ 2 – 2×8	—–	—–	—–	—–	—–	—–
16	8′ – 0″	OJ314	3×2	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None	8′ – 0″ None
	10′ – 0″			10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ None	10′ – 0″ Non	10′ – 0″ None	10′ – 0″ None	10′ – 0″ Non	10′ – 0″ None	10′ – 0″ None
	12′ – 0″			12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None	12′ – 0″ None”
	14′ – 0″			14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	14′ – 0″ None	13′ – 8″ None	12′ – 2″ None
	16′ – 0″			16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	16′ – 0″ None	15′ – 6″ None	16′ – 0″ None	14′ – 11″ None	—–	—–
	18′ – 0″	OJ315	3×2	18′ – 0″ None	18′ – 0″ None	18′ – 0″ 1 – 2×6	18′ – 0″ 1 – 2×6	18′ – 0″ None	18′ – 0″ None	18′ – 0″ 1 – 2×6	17′ – 4″ None	18′ – 0″ None	16′ – 9″ None	—–	—–
	20′ – 0″	OJ315	3×2	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	19′ – 5″ 1 – 2×6	—–	19′ – 4″ None	—–	—–	—–
		OJ418S(10)	4×2	20′ – 0″ None	20′ – 0″ None	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ None	20′ – 0″ None	20′ – 0″ 1 – 2×6	20′ – 0″ 1 – 2×6	20′ – 0″ None	18′ – 10″ None	—–	—–
	22′ – 0″	OJ418	4×2	22′ – 0″ None	22′ – 0″ 1 – 2×6	22′ – 0″ 1 – 2×6	22′ – 0″ 1 – 2×6	22′ – 0″ None	22′ – 0″ 1 – 2×6	22′ – 0″ 1 – 2×6	20′ – 2″ 1 – 2×6	22′ – 0″ None	—–	—–	—–
	24′ – 0″			24′ – 0″ 1 – 2×6	24′ – 0″ 1 – 2×6	24′ – 0″ 2 – 2×6	24′ – 0″ 2 – 2×6	24′ – 0″ 1 – 2×6	24′ – 0″ 1 – 2×6	24′ – 0″ 2 – 2×6	—–	23′ – 5″ 1 – 2×6	—–	—–	—–
	26′ – 0″			26′ – 0″ 1 – 2×6	26′ – 0″ 2 – 2×6	26′ – 0″ 1 – 2×8	25′ – 5″ 2 – 2×8	26′ – 0″ 1 – 2×6	26′ – 0″ 2 – 2×6	25′ – 3″ 1 – 2×8	—–	—–	—–	—–	—–
	28′ – 0″	OJ420	4×2	28′ – 0″ 2 – 2×6	28′ – 0″ 2 – 2×8	28′ – 0″ 1 – 2×10	26′ – 3″ 2 – 2×8	28′ – 0″ 2 – 2×6	28′ – 0″ 2 – 2×8	—–	—–	—–	—–	—–	—–
	30′ – 0″			30′ – 0″ 2 – 2×8	30′ – 0″ 2 – 2×10	28′ – 6″ 2 – 2×10	—–	30′ – 0″ 2 – 2×8	28′ – 8″ 2 – 2×8	—–	—–	—–	—–	—–	—–

Notes:

1. Strongbacks must be installed at mid-span to achieve the maximum spans indicated for the vibration criterion in section 9.23.4.3.(2) of the National Building Code of Canada (NBC). The 2×4’s and 2×6’s are considered to be in SPF #3/stud and the 2×8’s and 2×10’s, in SPF #1/#2.
2. The spans are based on simple-span joists.
3. The minimum bearing length is 1 ½”, spans values in bold indicate that web stiffeners are required at the OSB end panel.
4. The maximum span is measured o.c. of bearings and is based on uniformly loaded joists.
5. Dead load deflection is limited to L/360 and total load deflection is limited to L/240.
6. Live load deflection is limited to L/360.
7. Spans are based on limit states design and comply with NBC and CAN/CSA-O86 requirements.
8. Refer to the appropriate sections of the Specifier Guide for installation guidelines and construction details.
9. The considered subfloor is a standard 19/32″ plywood or 1F20 OSB for 12″, 16″ and 19.2″ o.c. spacing and standard 23/32″ plywood or 1F24 OSB for 24″ o.c. spacing and must be glued with adhesive per CAN/CGSB-71.26-M88 and nailed per NBC.
10. S = Limited inventory. Please contact your representative to determine quantities.