Grade 100 QOO Chain Sling is a quad-leg lifting assembly manufactured from quenched and tempered Grade 100 alloy steel chain and components. The sling is equipped with a quad oblong master link assembly on the top and four oblong master links on the bottom, making it suitable for heavy-duty lifting applications requiring multiple connection points and maximum configuration flexibility.

Unlike hook-type chain slings, the four oblong master links provide direct connection to shackles, lifting eyes, spreader beams, and custom lifting fixtures. The quad-leg configuration distributes lifting forces across four chain legs to improve load stability when handling oversized or irregularly shaped loads. Manufactured from Grade 100 alloy steel, the sling provides approximately 25% higher Working Load Limit than an equivalent Grade 80 sling while maintaining a 4:1 design factor.

Product Configuration Code

  Q = Quad Leg

  O = Quad Oblong Master Link Assembly

  O = Four Oblong Master Links

QOO therefore refers to a Quad Leg Chain Sling fitted with a Quad Oblong Master Link Assembly on the top and Four Oblong Master Links on the bottom.

Product Identification

  Each sling is permanently identified with:

  Individual Serial Number

  Chain Size

  Chain Grade

  Exact Sling Length

  Working Load Limit (WLL)

The serial number on the identification tag corresponds with the production certificate and sales order record, ensuring complete product traceability throughout the product life cycle.

Typical Applications

  Heavy Machinery Handling

  Structural Steel Lifting

  Offshore Module Installation

All chain slings are supplied with written certification and manufactured using matching Grade 100 components to ensure compatibility throughout the lifting assembly.

Meter table

Item NO.	Diameter of Lifting Chain	1 Leg	2 Legs		3 & 4 Legs		Continuous Sling
			0°＜α＜45°	45°＜α＜60°	0°＜α＜45°	45°＜α＜60°
		Factor 1.0	Factor 1.4	Factor 1.0	Factor 2.1	Factor 1.5	Factor 1.6
	mm	ton	ton	ton	ton	ton	ton
TPL81841004	4	1	1	1	1	1	1
TPL81841005	5	1	1	1	2	2	2
TPL81841006	6	1	2	1	3	2	2
TPL81841007	7	2	3	2	4	3	3
TPL81841008	8	3	4	3	5	4	4
TPL818410010	10	4	6	4	8	6	6
TPL818410013	13	7	9	7	14	10	11
TPL818410016	16	10	14	10	22	15	16
TPL818410018	18	13	18	13	26	19	20
TPL818410019	19	14	20	14	29	21	22
TPL818410020	20	16	22	16	34	24	26
TPL818410022	22	19	27	19	41	29	31
TPL818410026	26	27	37	27	56	40	42
TPL818410028	28	31	43	31	64	46	49
TPL818410030	30	36	50	36	75	53	57
TPL818410032	32	40	56	40	84	61	64
TPL818410036	36	50	70	50	105	75	80
TPL818410038	38	57	78	57	119	85	90
TPL818410040	40	63	88	63	131	94	100
TPL818410045	45	81	113	81	170	121.50.	130
TPL818410050	50	98	137	98	206	147	157

Feet table

Item No.	Diameter of Lifting Chain	1 Leg (90°)	2 Legs		3 & 4 Legs		Continuous Sling
			0°＜α＜45°	45°＜α＜60°	0°＜α＜45°	45°＜α＜60°
	(in.)	Factor 1.0 (lbs)	Factor 1.4 (lbs)	Factor 1.0 (lbs)	Factor 2.1 (lbs)	Factor 1.5 (lbs)	Factor 1.6 (lbs)
TPL81841004	5/32"	2,205	2,205	2,205	2,205	2,205	2,205
TPL81841005	3/16"	2,205	2,205	2,205	4,409	4,409	4,409
TPL81841006	1/4"	2,205	4,409	2,205	6,614	4,409	4,409
TPL81841007	9/32"	4,409	6,614	4,409	8,819	6,614	6,614
TPL81841008	5/16"	6,614	8,819	6,614	11,023	8,819	8,819
TPL81841010	3/8"	8,819	13,228	8,819	17,637	13,228	13,228
TPL81841013	1/2"	15,432	19,842	15,432	30,865	22,046	24,251
TPL81841016	5/8"	22,046	30,865	22,046	48,502	33,069	35,274
TPL81841018	3/4"	28,660	39,683	28,660	57,320	41,888	44,092
TPL81841019	3/4"	30,865	44,092	30,865	63,934	46,297	48,502
TPL81841020	13/16"	35,274	48,502	35,274	74,957	52,911	57,320
TPL81841022	7/8"	41,888	59,525	41,888	90,390	63,934	68,343
TPL81841026	1"	59,525	81,571	59,525	123,459	88,185	92,594
TPL81841028	1-1/8"	68,343	94,798	68,343	141,096	101,412	108,026
TPL81841030	1-3/16"	79,366	110,231	79,366	165,347	116,845	125,664
TPL81841032	1-1/4"	88,185	123,459	88,185	185,188	134,482	141,096
TPL81841036	1-3/8"	110,231	154,323	110,231	231,485	165,347	176,370
TPL81841038	1-1/2"	125,664	171,960	125,664	262,350	187,393	198,416
TPL81841040	1-9/16"	138,891	194,007	138,891	288,806	207,234	220,462
TPL81841045	1-3/4"	178,574	249,122	178,574	374,786	268,964	286,601
TPL81841050	2"	216,053	302,033	216,053	454,152	324,079	346,126

• Item No. – Unique product identification number for each chain size.

• Trade Size (in.) – Nominal diameter of the lifting chain, measured in inches.

• 1 Leg – Working Load Limit (WLL) for a single-leg chain sling in a vertical lift (90°).

• 2 Legs – Working Load Limit (WLL) for a two-leg chain sling at different sling angles.

• 3 & 4 Legs – Working Load Limit (WLL) for three-leg and four-leg chain slings at different sling angles.

• Continuous Sling – Working Load Limit (WLL) for a continuous (endless) chain sling configuration.

• Factor – Load factor applied according to the sling configuration and sling angle to determine the Working Load Limit.

• 0° < α < 45° – Sling angle measured from the vertical. This angle range provides the higher Working Load Limit for multi-leg slings.

• 45° < α < 60° – Sling angle measured from the vertical. As the sling angle increases, the Working Load Limit is reduced.

• Working Load Limit (lbs) – Maximum allowable load that the sling can safely lift under the specified configuration and angle. Values are shown in pounds (lbs).

Name: Grade 100 QOO Chain Sling – Quad Leg Oblong Master Link on Top and Four Oblong Master Links Bottom

MOQ: 100 Sets

Package: Carton + Steel Pallet

Manufacturing Standards: Manufactured from quenched and tempered Grade 100 alloy steel chain and components in accordance with EN 818-2, EN 1677-1, EN 1677-4, ASME B30.9, OSHA 1910.184, AS 2321, and ISO 3077 requirements for Grade 100 lifting chain sling assemblies.

Testing Standards: Manufactured with a minimum design factor of 4:1. Each sling is proof tested, visually inspected, dimensionally verified, and checked for component compatibility before shipment. The chain complies with EN 818 fatigue requirements and successfully withstands 20,000 load cycles at 1.5 times the Working Load Limit (WLL). Every sling is supplied with an individual serial number, identification tag, written certification, and complete traceability records.

Application Standards: Suitable for overhead lifting, multi-point lifting, heavy machinery handling, structural steel erection, offshore lifting, precast concrete installation, spreader beam systems, and industrial material handling operations.

Maintenance Standards: Inspect before each use for chain elongation, excessive wear, cracks, corrosion, deformation of master links, damaged connecting links, and missing identification tags. Remove the sling from service immediately if defects exceed the applicable inspection criteria.