Span Tables

• 9-1/4" Truss Depth
• 11-1/4" Truss Depth
• 11-7/8" Truss Depth
• 14" Truss Depth
• 16" Truss Depth
• 18" Truss Depth
• 20" Truss Depth

9-1/4" Truss Depth*

9-1/4" Depth Maximum Live Load Deflection (L/360 & L/480, 1-1/2" Minimum Bearing Each End)

Chord* Size	Chord* Grade	Loading (PSF)		12" o.c.		16" o.c.		19.2" o.c.		24" o.c.
		Live	Dead	L/360	L/480	L/360	L/480	L/360	L/480	L/360	L/480
3x2	#2	40	15	15'-9"	15'-9"	15'-9"	14'-11"	15'-6"	14'-0"	14'-3"	12'-10"
4x2	MSR 2100	40	15	19'-9"	19'-5"	19'-1"	17'-3"	17'11"	16'-6"	16'-11"
3x2	#2	50	15	15'-9"	15'-3"	15'-3"	13'-9"	14'-3"	12'-10"	13'-2"	11'-11"
4x2	MSR 2100	50	15	19'-9"	17'-11"	17'-11"	16'-4"	16'-11"
3x2	#2	100	15	13'-2"	11'-11"	11'-11"	10'-8"	11'-1"	9'-11"	9'-3"	8'-9"

11-1/4" Truss Depth*

11-1/4" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)

Chord* Size	Chord* Grade	Loading (PSF)		12" o.c.		16" o.c.		19.2" o.c.		24" o.c.
		Live	Dead	L/360	L/480	L/360	L/480	L/360	L/480	L/360	L/480
3x2	#2	40	15	16'-6"	16'-6"	16'-6"	16'-2"	16'-4"	15'-6"	15'-10"	14'-2"
4x2	#2	40	15	18'-9"	18'-3"	18'-9"	18'-1"	18'-2"	17'-6"
4x2	MSR 2100	40	15	21'-9"	21'-9"	21'-9"	19'-10"	20'-6"
3x2	#2	50	15	16'-6"	16'-3"	16'-3"	15'-3"	15'-10"	14'-2"	14'-4"	13'-1"
4x2	#2	50	15	18'-3"	18'-2"	18'-2"	17'-3"	17'-1"
4x2	MSR 2100	50	15	21'-9"	20'-4"	20'-2"		19'-1"
3x2	#2	100	15	14'-6"	13'-1"	13'-0"	11'-9"	11'-6"	11'-0"	9'-8"	9'-7"
4x2	#2	100	15
4x2	MSR 2100	100	15

11-7/8" Truss Depth*

11-7/8" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)

Chord* Size	Chord* Grade	Loading (PSF)		12" o.c.		16" o.c.		19.2" o.c.		24" o.c.
		Live	Dead	L/360	L/480	L/360	L/480	L/360	L/480	L/360	L/480
3x2	#2	40	15	16'-9"	16'-9"	16'-9"	16'-9"	16'-9"	16'-8"	16'-9"	15'-2"
4x2	#2	40	15	18'-9"	18'-9"	18'-9"	18'-9"	18'-9"	18'-7"	17'-2"	17'-2"
4x2	MSR 2100	40	15	22'-9"	22'-9"	22'-9"	21'-0"	21'-5"	19'-10"	19'-3"
3x2	#2	50	15	16'-9"	16'-9"	16'-9"	16'-5"	16'-9"	15'-2"	15'-4"	14'-1"
4x2	#2	50	15	18'-9"	18'-9"	18'-9"	18'-5"	17'-8"	17'-3"	16'-3"
4x2	MSR 2100	50	15	22'-9"	21'-5"	21'-5"	19'-8"	20'-3"
3x2	#2	100	15	15'-7"	14'-1"	13'-11"	12'-9"	12'-3"	11'-11"	10'-4"	10'-4"
4x2	#2	100	15	16'-11"

14" Truss Depth*

14" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)

Chord* Size	Chord* Grade	Loading (PSF)		12" o.c.		16" o.c.		19.2" o.c.		24" o.c.
		Live	Dead	L/360	L/480	L/360	L/480	L/360	L/480	L/360	L/480
3x2	#2	40	15	17'-9"	17'-9"	17'-9"	17'-9"	17'-9"	17'-9"	17'-9"	16'-4"
4x2	#2	40	15	20'-9"	20'-9"	20'-9"	20'-9"	20'-9"	19'-10"	18'-9"	18'-5"
4x2	MSR 2100	40	15	24'-9"	24'-9"	24'-8"	22'-9"	23'-5"	21'-2"	20'-10"
3x2	#2	50	15	17'-9"	17'-9"	17'-9"	17'-7"	17'-9"	16'-5"	16'-4"	15'-3"
4x2	#2	50	15	20'-9"	20'-9"	20'-9"	19'-8"	19'-9"	18'-6"
4x2	MSR 2100	50	15	24'-9"	23'-2"	23'-2"	21'-0"	21'-10"
3x2	#2	100	15	16'-9"	15'-2"	14'-4"	13'-8"	12'-10"	12'-8"	10'-9"	10'-9"
4x2	#2	100	15	18'-4"

16" Truss Depth*

16" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)

Chord* Size	Chord* Grade	Loading (PSF)		12" o.c.		16" o.c.		19.2" o.c.		24" o.c.
		Live	Dead	L/360	L/480	L/360	L/480	L/360	L/480	L/360	L/480
4x2	#2	40	15	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"
4x2	MSR 2100	40	15	25'-9"	25'-9"	25'-9"	25'-9"	25'-9"	25'-6"	25'-9"	22'-5"
4x2	MSR 2400	40	15	29'-9"	29'-8"	29'-9"	27'-7"	28'-5"		26'-10"
4x2	#2	50	15	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	20'-10"
4x2	MSR 2100	50	15	25'-9"	25'-9"	25'-9"	25'-0"	25'-9"	22'-5"	23'-10"
4x2	MSR 2400	50	15	29'-9"	28'-2"	28'-3"		26'-10"
4x2	#2	100	15	21'-9"	20'-10"	19'-1"	19'-0"	16'-9"	15'-9"
4x2	MSR 2100	100	15	23'-3"

18" Truss Depth*

18" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)

Chord* Size	Chord* Grade	Loading (PSF)		12" o.c.		16" o.c.		19.2" o.c.		24" o.c.
		Live	Dead	L/360	L/480	L/360	L/480	L/360	L/480	L/360	L/480
4x2	#2	40	25	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"
4x2	MSR 2100	40	25	26'-9"	26'-9"	26'-9"	26'-9"	26'-9"	26'-9"	26'-9"	26'-9"
4x2	MSR 2400	40	25	30'-9"	30'-9"	30'-9"	30'-2"	30'-9"	28'-9"	28'-9"	26'-10"
4x2	#2	100	25	21'-9"	21'-9"	21'-9"	21'-9"	18'-9"	18'-9"	14'-9"	14'-9"
4x2	MSR 2100	100	25	26'-9"	24'-8"
4x2	MSR 2400	100	25	26'-11"

20" Truss Depth*

20" Depth Maximum Live Load Deflection - (L/360 & L/480, 1-1/2" Minimum Bearing Each End)

Chord* Size	Chord* Grade	Loading (PSF)		12" o.c.		16" o.c.		19.2" o.c.		24" o.c.
		Live	Dead	L/360	L/480	L/360	L/480	L/360	L/480	L/360	L/480
4x2	#2	40	25	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"	21'-9"
4x2	MSR 2100	40	25	27'-9"	27'-9"	27'-9"	27'-9"	27'-9"	27'-9"	27'-9"	27'-9"
4x2	MSR 2400	40	25	31'-9"	31'-9"	31'-9"	31'-9"	31'-9"	31'-9"	29'-9"	29'-4"
4x2	#2	100	25	21'-9"	21'-9"	21'-9"	21'-4"	18'-9"	18'-9"	14'-9"	14'-9"
4x2	MSR 2100	100	25	27'-9"	25'-4"
4x2	MSR 2400	100	25	29'-6"

• View details on fire resistance assemblies for one and two hour endurance.
• * Because OPEN JOIST is a "stock" product, the length of an OPEN JOIST truss determines the size and grade of the truss' chords (see table below). Maximum spans published on the chart above may be limited by standard joist configuration. To find maximum clear span for a given truss depth in a given loading condition, refer to the bottom line of spans shown for that particular truss depth.
• NOTE: Clear spans shown on this chart are presented under the following conditions: (1) Bearing size varies and is determined by loading conditions, truss span and truss spacing; (2) "Strongback" bracing is not considered; (3) Assumes composite action with a single layer of 3/4" wood sheathing glued and nailed or screwed; (4) Spans are clear distance between supports for uniformly loaded trusses and include allowable increases for repetitive use members.
• Special Engineering Note: Open Joist trusses may be manufactured with components that provide increased structural values that may exceed the performance levels indicated in these charts.