Engineering resource

Cable ladder load ratings

Published safe working loads for tested Array Metal cable ladder, tray and wire-mesh systems, stated by support span. Each rating includes the safety factor used by its test programme.

IEC 61537NEMA VE1-2009SIRIM-tested programme

Published test data

Values are uniformly distributed safe working loads in kg/m. Select the row for the rail height and the column matching the support span.

Cable Ladder

AML Series

NEMA VE1 · Hot-Dip Galvanized (HDG) · Safety factor ×1.5

NEMA VE1-2009

Model	Loading depth	Thickness	SWL @ 3 m (kg/m)	SWL @ 4.5 m (kg/m)	SWL @ 6 m (kg/m)	NEMA class
AML100	75 mm	1.5 / 2 mm	192	85	48	NEMA 20AA
AML125	100 mm	1.5 / 2 mm	480	213	120	NEMA 20B
AML150	125 mm	1.5 / 2 mm	468	208	117	NEMA 20B

Rating basis. SWL = Destructive load ÷ 1.5 (NEMA VE1-2009). Available lengths: 3 m and 6 m. Deflection limit: L/100 at SWL.

Cable Ladder

AML Series

IEC 61537:2006, Test Type 2 · Hot-Dip Galvanized (HDG) · Safety factor ×1.7

IEC 61537:2006

Model	Loading depth	Thickness	SWL @ 3 m (kg/m)	SWL @ 4.5 m (kg/m)	SWL @ 6 m (kg/m)	NEMA class
AML100	75 mm	1.5 / 2 mm	156	69	39	NEMA 20AA
AML125	100 mm	1.5 / 2 mm	456	203	114	NEMA 20B
AML150	125 mm	1.5 / 2 mm	504	224	126	NEMA 20B

Rating basis. SWL = Breaking load ÷ 1.7 (IEC 61537:2006, Test Type 2). Available lengths: 3 m and 6 m.

Cable Ladder

APO Series

NEMA VE1 · Hot-Dip Galvanized (HDG) · Safety factor ×1.5

SIRIM / NEMA VE1-2009

Model	Loading depth	Thickness	SWL @ 3 m (kg/m)	SWL @ 4.5 m (kg/m)	SWL @ 6 m (kg/m)	NEMA class
APO100	75 mm	1.5 / 2 mm	192	85	48	NEMA 20AA
APO125	100 mm	1.5 / 2 mm	416	185	104	NEMA 20A
APO150	125 mm	1.5 / 2 mm	540	240	135	NEMA 20B

Rating basis. SWL = Destructive load ÷ 1.5 (NEMA VE1-2009). Test certificate reference: SIRIM-NEMA VE1-2009. Available lengths: 3 m and 6 m.

Cable Ladder

APO Series

IEC 61537:2006, Test Type 2 · Hot-Dip Galvanized (HDG) · Safety factor ×1.7

IEC 61537:2006

Model	Loading depth	Thickness	SWL @ 3 m (kg/m)	SWL @ 4.5 m (kg/m)	SWL @ 6 m (kg/m)	NEMA class
APO100	75 mm	1.5 / 2 mm	228	101	57	NEMA 20AA
APO125	100 mm	1.5 / 2 mm	408	181	102	NEMA 20A
APO150	125 mm	1.5 / 2 mm	452	240	113	NEMA 20B

Rating basis. SWL = Breaking load ÷ 1.7 (IEC 61537:2006, Test Type 2). Available lengths: 3 m and 6 m.

Cable Ladder

ACD Series

IEC 61537:2006, Test Type 2 · Hot-Dip Galvanized (HDG) · Safety factor ×1.7

IEC 61537:2006

Model	Loading depth	Thickness	SWL @ 3 m (kg/m)	SWL @ 4.5 m (kg/m)	SWL @ 6 m (kg/m)	NEMA class
ACD100	75 mm	1.5 mm (tested)	239	106	60	NEMA 20AA
ACD125	100 mm	1.5 / 2 mm	560	249	140	NEMA 20B
ACD150	125 mm	1.5 / 2 mm	579	257	145	NEMA 20B

Rating basis. SWL = Breaking load ÷ 1.7 (IEC 61537:2006). Breaking load confirmed ≥ 1.7 × SWL by test. Certificate ref: 2018MA0594-ACD-IEC61537. Available lengths: 3 m and 6 m. Full test certificate available on request.

Cable Ladder

AZL Series

IEC 61537:2006, Test Type 2 · Hot-Dip Galvanized (HDG) · Safety factor ×1.7

IEC 61537:2006

Model	Loading depth	Thickness	SWL @ 3 m (kg/m)	SWL @ 4.5 m (kg/m)	SWL @ 6 m (kg/m)	NEMA class
AZL100	75 mm	1.5 / 2 mm	208	92	52	NEMA 20AA
AZL125	100 mm	1.5 / 2 mm	408	181	102	NEMA 20A
AZL150	125 mm	1.5 / 2 mm	536	238	134	NEMA 20B

Rating basis. SWL = Breaking load ÷ 1.7 (IEC 61537:2006, Test Type 2). Available lengths: 3 m and 6 m.

Cable Tray

ART / AMT Series

NEMA VE1 · Hot-Dip Galvanized (HDG) · Safety factor ×1.5

NEMA VE1-2009

Model	Loading depth	Thickness	SWL @ 1.5 m (kg/m)	SWL @ 2 m (kg/m)	SWL @ 3 m (kg/m)	NEMA class
ART50	50 mm	1.5 / 2 mm	484	272	121	NEMA 20AA
AMT100	100 mm	1.5 / 2 mm	716	403	179	NEMA 20B

Rating basis. SWL = Destructive load ÷ 1.5 (NEMA VE1-2009). Available lengths: 3 m and 6 m. Deflection limit: L/100 at SWL.

Cable Tray

ART / AMT Series

IEC 61537:2006, Test Type 2 · Hot-Dip Galvanized (HDG) · Safety factor ×1.7

IEC 61537:2006

Model	Loading depth	Thickness	SWL @ 1.5 m (kg/m)	SWL @ 2 m (kg/m)	SWL @ 3 m (kg/m)	NEMA class
ART50	50 mm	1.5 / 2 mm	392	221	98	NEMA 10A
AMT100	100 mm	1.5 / 2 mm	1076	605	269	NEMA 10A

Rating basis. SWL = Breaking load ÷ 1.7 (IEC 61537:2006, Test Type 2). Available lengths: 3 m and 6 m.

Wire Mesh Tray

AWT Series

NEMA VE1 · Hot-Dip Galvanized (HDG) · Safety factor ×1.5

NEMA VE1

Model	Loading depth	Thickness	SWL @ 1.5 m (kg/m)	SWL @ 2 m (kg/m)	SWL @ 3 m (kg/m)	NEMA class
AWT50	50 mm	4.5 mm wire	88	50	22	NEMA 5A
AWT100	100 mm	4.5 mm wire	96	54	24	NEMA 8AA
AWT100	100 mm	5.9 mm wire	248	140	62	NEMA 10AA

Rating basis. SWL = Destructive load ÷ 1.5 (NEMA VE1). AWT100 has separate ratings for 4.5 mm and 5.9 mm wire diameters.

Methodology

Test conditions and safety factors

NEMA VE1-2009

APO · AML · ART · AMT · AWT series

Test type: Single-span, uniformly distributed load
Safety factor: ×1.5
SWL definition: Destructive load ÷ 1.5
Deflection limit: L/100 at SWL
Load classification: 5A, 8AA, 10AA, 10A, 20AA, 20A, 20B (increasing capacity)
Test body: SIRIM (Malaysia)

IEC 61537:2006

ACD · AZL · AML · APO · ART · AMT series

Test type: Single-span, uniformly distributed load
Safety factor: ×1.7
SWL definition: Breaking load ÷ 1.7
Deflection limit: L/100 at SWL
Breaking load: Confirmed ≥ 1.7 × SWL by test
Certificate ref: 2018MA0594-ACD-IEC61537