Unistrut A4000 - 1-1/4" x 3/4", 19 Gauge Metal Framing Channel

Unistrut A4000 is a 1-1/4" x 5/8" channel with a 19 ga (.040") wall. It is slightly shorter than the A3300.

Resources

• A4000 Submittal PDF
• Aluminum and Stainless Steel PDF
• Complete Unistrut Catalog

Elements of Section - A4000
Area of Section	0.132 in2 ( 0.9 cm2)
	Axis 1-1	Axis 2-2
Moment of Inertia (I)	0.008 in4 (3.2 cm4)	0.029 in4 (4.3 cm4)
Section Modulus (S)	0.022 in3 (1.7 cm3)	0.046 in3 (2.7 cm3)
Radius of Gyration (r)	0.240 in (1.0 cm )	0.469 in (1.2 cm )

Raw steel conforms to the following ASTM specifications:

GAUGE	FINISH	ASTM NO.
12	GR & HG	A1011 SS GR 33
	PG	A653 GR 33
14	GR & HG	A1011 SS GR 33
	PG	A653 GR 33
16	GR & HG	A1011 SS GR 33
	PG	A653 GR 33
19	GR	A1008
GR = Perma-Green® III PG = Pre-Galvanized Zinc HG = Hot-Dipped Galvanized

 

Part No.	Finish	Length (ft)	Weight Per Foot
A4000-16-GR	Perma-Green® III	16'	0.450 Lbs.
A4000-16-HG	Hot-Dipped Galvanized	16'	0.470 Lbs.
A4000-16-PL	Plain	16'	0.450 Lbs.
A4000-16-EA	Extruded Aluminum	16'	0.256 Lbs.
A4000-20-SS	304 Stainless Steel	20'	0.500 Lbs.
View the Unistrut Finish Specifications PDF for detailed specifications on all finishes. GR = Perma-Green® III PG = Pre-Galvanized Zinc PL = Plain

Column Loading - A4000
Unbraced Height (in)	Allowable Load at Slot Face (lbs)	Max Column Load Applied at C.G.
		K=0.65 (lbs)	K=0.80 (lbs)	K=1.0 (lbs)	K=1.2 (lbs)
18	960	2,510	2,290	1,990	1,700
24	880	2,190	1,890	1,530	1,230
36	670	1,570	1,230	830	580
48	470	1,110	730	470	*
60	340	710	470	*	*
*KL/r > 200 See notes below for more information

Beam Loading - A4000
Span (in)	Max Allowable Uniform Load (lbs)	Defl at Uniform load (in)	Uniform Loading at Deflection			Lateral Bracing Reduction Factor
			Span /180 (lbs)	Span /240 (lbs)	Span /360 (lbs)
18	250	0.08	250	220	150	1.00
24	190	0.15	170	120	80	0.94
36	120	0.32	70	60	40	0.83
48	90	0.58	40	30	20	0.73
60	70	0.88	30	20	10	0.65
72	60	1.30	20	10	10	0.58
See notes below for more information

Notes:

1. Beam loads are given in total uniform load (W Lbs) not uniform load (w lbs/ft or w lbs/in).

2. Beam loads are based on a simple span and assumed to be adequately laterally braced. Unbraced spans can reduce beam load carrying capacity. Refer to the linked page for reduction factors for unbraced lengths from 2 to 20 feet.

3. For pierced channel, multiply beam loads by the following factor:

• "KO" Series .......95%
• "T" Series ..........85%
• "HS" Series .......90%
• "SL" Series ........85%
• "H3" Series ........90%
• "DS" Series ........70%

4. Deduct channel weight from the beam loads.

5. For concentrated midspan point loads, multiply beam loads by 50% and the corresponding deflection by 80%. Follow this link for information regarding other load conditions.

6. All beam loads are for bending about Axis 1-1.

Sample calculation #1:

Here is a sample calculation to demonstrate the beam loading charts, and the load reduction factors.

Say we have an 6’ span of P1000sl, and want to see what the load capacity is for a point load.

Per the charts, P1000 is good for a maximum allowable uniform load (not load per foot) of 560 lbs. In referencing the notes below, we have the following load reductions:

- X .85 for the sl

- X .5 for a point load in the center

- X .78 load reduction per page 56

Therefore 560 lbs x .85 x .5 x .78 = 185 lbs.

Sample Calculation #2.

Say we have a 5’ span of P1001, and want to see the load capacity for a point load.

Per the charts, p1001 is good for a maximum allowable uniform load (not load per foot) of 1,910 lbs. In referencing the notes below, we have the following load reductions:

- X .5 for a point load in the center

- X .97 load reduction

Therefore 1,910 lbs x .5 x. 97 = 926 lbs.

Note that these assume that the strut connection is able to handle the load. It is the responsibility of you and your Engineer to review all calculations and connections, and to verify that all items are installed per Unistrut requirements. Unistrut Service Company takes no responsibility for the misuse of information provided. Local codes may dictate more stringent requirements.

Related A4000 Series Channels
A4001

Request a Quote for Unistrut A4000

Product:	A4000
Name:*
Company:
Email:*
Phone:
Fax:
Describe your product needs ( - quantities, lengths, finish, etc:)