McMaster-Carr

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	Outside Width Outside Width

2 9/16"

3 1/2"

	Inside Width Inside Width

	Outside Height Outside Height

	Wall Thickness Wall Thickness

	Color Color

	Green
	Red

	For Use Outdoors For Use Outdoors

Yes

	Performance Properties Performance Properties

	Length Length

	Inside Height Inside Height

	Grade Grade

FRP

GPO3

	Inside Corner Shape Inside Corner Shape

Square

Round

	Compressive Strength Compressive Strength

14,000-70,000 psi

32,000-42,000 psi

	Flexural Strength Flexural Strength

10,000-60,000 psi

23,200-31,000 psi

	Electrical Insulation Rating Electrical Insulation Rating

Good

Poor

	Impact Strength Impact Strength

4-30 ft.-lbs./in.

8.2-12 ft.-lbs./in.

	Hardness Hardness

Barcol 45

Barcol 50

Rockwell M95

	Dielectric Strength Dielectric Strength

35-200 V/mil

200-600 V/mil

	Density Density

0.063 lbs./cu. in.

0.058-0.070 lbs./cu. in.

	Tensile Strength Tensile Strength

7,000-40,000 psi

10,000-15,000 psi

	Maximum Temperature Maximum Temperature

30 Products

About Composites

Color: Green
Max. Temperature: 140° F
Tensile Strength: 7,000-40,000 psi (Good)
Impact Strength: 4-30 ft.-lbs./in. (Excellent)
Hardness: Barcol 45 (Hard)
For Use Outdoors: Yes

Made of fiberglass-reinforced polyester, these FRP fiberglass U-channels are an alternative to wood in structural applications. They are strong and lightweight.

Outside				Inside
Wd.	Wd. Tolerance	Ht.	Ht. Tolerance	Wd.	Ht.	Straightness Tolerance		Each
5 ft. Lg.
1/8" Wall Thick. (-0.013" to 0.013")
2"	-0.094" to 0.094"	9/16"	-0.094" to 0.094"	1 3/4"	7/16"	0.050" per ft.	0000000	000000
3/16" Wall Thick. (-0.019" to 0.019")
3 1/2"	-0.094" to 0.094"	1 1/2"	-0.094" to 0.094"	3 1/8"	1 5/16"	0.050" per ft.	0000000	00000
1/4" Wall Thick. (-0.025" to 0.025")
3"	-0.094" to 0.094"	7/8"	-0.094" to 0.094"	2 1/2"	5/8"	0.050" per ft.	0000000	00000
3"	-0.094" to 0.094"	1"	-0.094" to 0.094"	2 1/2"	3/4"	0.050" per ft.	0000000	00000
4"	-0.094" to 0.094"	1 1/8"	-0.094" to 0.094"	3 1/2"	7/8"	0.050" per ft.	0000000	00000
6"	-0.094" to 0.094"	1 5/8"	-0.094" to 0.094"	5 1/2"	1 3/8"	0.050" per ft.	0000000	00000
8"	-0.094" to 0.094"	2 3/16"	-0.094" to 0.094"	7 1/2"	1 15/16"	0.050" per ft.	0000000	00000
10 ft. Lg.
1/8" Wall Thick. (-0.013" to 0.013")
2"	-0.094" to 0.094"	9/16"	-0.094" to 0.094"	1 3/4"	7/16"	0.050" per ft.	0000000	00000
3/16" Wall Thick. (-0.019" to 0.019")
3 1/2"	-0.094" to 0.094"	1 1/2"	-0.094" to 0.094"	3 1/8"	1 5/16"	0.050" per ft.	0000000	00000
1/4" Wall Thick. (-0.025" to 0.025")
3"	-0.094" to 0.094"	7/8"	-0.094" to 0.094"	2 1/2"	5/8"	0.050" per ft.	0000000	00000
3"	-0.094" to 0.094"	1"	-0.094" to 0.094"	2 1/2"	3/4"	0.050" per ft.	0000000	00000
4"	-0.094" to 0.094"	1 1/8"	-0.094" to 0.094"	3 1/2"	7/8"	0.050" per ft.	0000000	00000
6"	-0.094" to 0.094"	1 5/8"	-0.094" to 0.094"	5 1/2"	1 3/8"	0.050" per ft.	0000000	000000
8"	-0.094" to 0.094"	2 3/16"	-0.094" to 0.094"	7 1/2"	1 15/16"	0.050" per ft.	0000000	000000

Arc-Resistant GPO3 Fiberglass U-Channels

Color: Red
Max. Temperature: 265° F
Tensile Strength: 10,000-15,000 psi (Good)
Impact Strength: 8.2-12 ft.-lbs./in. (Excellent)
Hardness: See table
For Use Outdoors: No
Specifications Met: UL 94V0

These GPO3 fiberglass U-channels are often used for electrical applications in humid environments. They are arc and track resistant, plus they have better electrical insulation properties than FRP fiberglass. Made of fiberglass-reinforced polyester, they're also called polyester-grade industrial laminate.

Outside				Inside
Wd.	Wd. Tolerance	Ht.	Ht. Tolerance	Wd.	Ht.	Hardness	Straightness Tolerance		Each
3 ft. Lg.
1/8" Wall Thick. (-0.025" to 0.025")
2 9/16"	-0.063" to 0.063"	1 7/32"	-0.032" to 0.032"	2 1/4"	1 3/32"	Barcol 50 (Hard)	0.050" per ft.	0000000	000000
3/16" Wall Thick. (-0.025" to 0.025")
3 9/16"	-0.063" to 0.063"	2 9/16"	-0.032" to 0.032"	3 3/8"	2 3/8"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
4 1/4"	-0.040" to 0.040"	2"	-0.020" to 0.020"	3 7/8"	1 13/16"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
4 3/4"	-0.063" to 0.063"	1 5/8"	-0.032" to 0.032"	4 3/8"	1 7/16"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
8 1/2"	-0.040" to 0.040"	2 11/16"	-0.020" to 0.020"	8 1/8"	2 1/2"	Rockwell M95 (Hard)	0.050" per ft.	0000000	00000
1/4" Wall Thick. (-0.025" to 0.025")
2"	-0.040" to 0.040"	1"	-0.020" to 0.020"	1 1/2"	3/4"	Rockwell M95 (Hard)	0.050" per ft.	0000000	00000
6 1/2"	-0.040" to 0.040"	2 3/4"	-0.020" to 0.020"	6"	2 1/2"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
3/8" Wall Thick. (-0.025" to 0.025")
11 9/32"	-0.040" to 0.040"	1 5/8"	-0.020" to 0.020"	10 17/32"	1 1/4"	Rockwell M95 (Hard)	0.050" per ft.	0000000	00000
6 ft. Lg.
1/8" Wall Thick. (-0.025" to 0.025")
2 9/16"	-0.063" to 0.063"	1 7/32"	-0.032" to 0.032"	2 1/4"	1 3/32"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
3/16" Wall Thick. (-0.025" to 0.025")
3 9/16"	-0.063" to 0.063"	2 9/16"	-0.032" to 0.032"	3 3/8"	2 3/8"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
4 1/4"	-0.040" to 0.040"	2"	-0.020" to 0.020"	3 7/8"	1 13/16"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
4 3/4"	-0.063" to 0.063"	1 5/8"	-0.032" to 0.032"	4 3/8"	1 7/16"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
8 1/2"	-0.040" to 0.040"	2 11/16"	-0.020" to 0.020"	8 1/8"	2 1/2"	Rockwell M95 (Hard)	0.050" per ft.	0000000	00000
1/4" Wall Thick. (-0.025" to 0.025")
2"	-0.040" to 0.040"	1"	-0.020" to 0.020"	1 1/2"	3/4"	Rockwell M95 (Hard)	0.050" per ft.	0000000	00000
6 1/2"	-0.040" to 0.040"	2 3/4"	-0.020" to 0.020"	6"	2 1/2"	Barcol 50 (Hard)	0.050" per ft.	0000000	00000
3/8" Wall Thick. (-0.025" to 0.025")
11 9/32"	-0.040" to 0.040"	1 5/8"	-0.020" to 0.020"	10 17/32"	1 1/4"	Rockwell M95 (Hard)	0.050" per ft.	0000000	000000

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Structural FRP Fiberglass U-Channels

Arc-Resistant GPO3 Fiberglass U-Channels