Great Circle Rigging - stainless steel high tensile grade 460 bars

Projects that have used Great Circle Stainless Steel Rigging Components

Threaded Stainless Steel Bar Systems from Great Circle Rigging Ltd

Stainless Steel Rigging Cables from Great Circle Rigging Ltd

High Tensile Carbon Steel Rigging Components from Great Circle Rigging Ltd

Stainless Steel Balustrade Components from Great Circle Rigging Ltd

The Grade 460 bar system is available in both stainless steel and carbon steel and is used on applications where high strength, minimum stretch is required. This gives the architect the advantage of slender but very strong main structural support using steels which have a minimum yield stress of 460N/mm². The final surface finish of the carbon steel bars can be painted to compliment the surrounding structures.

Code GC764 RHT GC765 LHT	Bar Dia mm	Thread Metric	Max bar length	Yield Load 460 Bar kN	Break Load 460 Bar kN	Adjustment PerFork +/- mm	L mm	Fc mm	Fd mm	Fw mm	Y mm	OAW	Clevis Pin Dia P mm	Wt kg
GC764/5-12	12	M12	6M	29.9	51.0	7.5	69	21	32	14	24	32	12	0.4
GC764/5-16	16	M16	6M	51.0	95.0	7.5	85	27	38	16	24	43	16	0.6
GC764/5-20	19	M20	7.5M	112.7	149.5	7.5	99	33	51	19	51	51	20	1.1
GC764/5-24	22	M24	7.5M	162.4	213.3	10	114	41	62	24	62	62	24	1.5
GC764/5-30	28	M28	7.5M	258.1	342.2	10	137	52	74	30	79	79	30	2.5
GC764/5-36	33	M36	7.5M	375.8	498.4	10	156	61	87	34	93	93	36	4
GC764/5-42	39	M42	7.5M	515.7	638.8	12.7	169	69	97	39	107	107	42	10

Bar requirements longer than those above can be extended by using our stainless steel couplers.

Code GC744 RHT GC745 LHT	Bar Dia mm	Thread Metric	L mm	X Dia mm	Wt kg
GC744/5-12	12	M12	25	18	0.075
GC744/5-16	16	M16	26	22	0.09
GC744/5-20	19	M20	40	29	0.3
GC744/5-24	22	M24	45	35	0.4
GC744/5-30	28	M28	50	43	0.6
GC744/5-36	33	M36	55	52	1.1
GC744/5-42	39	M42	60	60	1.2

Code GC749	Bar Dia mm	Thread Metric L/H R/H	Adjustment +/- mm	L mm	O/D mm	Z mm	Wt kg
GC749-12	12	M12	25	70	18	40	0.15
GC749-16	16	M16	25	85	22	50	0.25
GC749-20	19	M20	50	144	29	100	0.3
GC749-24	22	M24	50	155	35	100	0.5
GC749-30	28	M28	50	170	43	100	0.8
GC749-36	33	M36	50	180	52	100	1.4
GC749-42	39	M42	50	195	60	100	1.9

Mechanical Properties

Grade 316 stainless steel, cold drawn to BS970
Ultimate tensile stress:	610 N/mm²
Minimum yield stress :	460 N/mm²
Thread specification :	Rolled metric threads to BS3643

Stainless steel systems can be offered as:
Satin finish:	Forks - electro polished
	Bars - 240 grit machine finish

Bright polished:	Forks & Fittings hand polished to a bright finish
	Bars - Machined finish to a bright polish

Adjustment for L/H & R/H Forks can have a minimum range of +/- one bar diameter per tendon. Turnbuckles would give an additional adjustment of +/- 50mm. Location of turnbuckles can be either at mid position along the tendon, or at one end.

Threaded Flat fork (Style GC864/865)

Code GC864 RHT GC865 LHT	Bar Dia mm	Thread Metric	Yield Load 460 Bar kN	Break Load 460 Bar kN	Adjustment PerFork +/- mm	L mm	Fc mm	Fd mm	Fw mm	Y mm	OAW	Clevis Pin Dia P mm	Wt kg
GC864/5-12	12	M12	29.9	51.0	7.5	69	21	32	14	24	32	12	0.4
GC864/5-16	16	M16	51.0	95.0	7.5	85	27	38	16	24	43	16	0.6
GC864/5-20	19	M20	112.0	149.5	7.5	99	33	51	19	51	51	20	1.1
GC864/5-24	22	M24	162.0	213.3	10	114	41	62	24	62	62	24	1.5
GC864/5-30	28	M28	258.0	342.2	10	137	52	74	30	79	79	30	2.5
GC864/5-36	33	M36	375.0	498.4	10	156	61	87	34	93	93	36	4
GC864/5-42	39	M42	515.0	638.8	12.7	169	69	97	39	107	107	42	10
GC864/5-48	44.5	M48	677.0	898.0	12.7	188	78	109	44	84	121	48	12
GC864/5-52	52	M52	933.0	1238.0	12.7	217	96	130	49	95	145	56	18

Bar requirements longer than those above can be extended by using our carbon steel couplers.

Code GC844 RHT GC845 LHT	Bar Dia mm	Thread Metric	L mm	X Dia mm	Wt kg
GC844/5-12	12	M12	25	18	0.075
GC844/5-16	16	M16	26	22	0.09
GC844/5-20	19	M20	40	29	0.3
GC844/5-24	22	M24	45	35	0.4
GC844/5-30	28	M28	50	43	0.6
GC844/5-36	33	M36	55	52	1.1
GC844/5-42	39	M42	60	60	1.2
GC844/5-48	44.5	M48	60	68	1.8
GC844/5-52	52	M56	75	80	2.3

Code GC849	Bar Dia mm	Thread Metric L/H R/H	Adjustment +/- mm	L mm	O/D mm	Z mm	Wt kg
GC849-12	12	M12	25	70	18	40	0.15
GC849-16	16	M16	25	85	22	50	0.25
GC849-20	19	M20	50	144	29	100	0.3
GC849-24	22	M24	50	155	35	100	0.5
GC849-30	28	M28	50	170	43	100	0.8
GC849-36	33	M36	50	180	52	100	1.4
GC849-42	39	M42	50	195	60	100	1.9
GC849-48	44.5	M48	50	210	68	100	2.6
GC849-52	52	M56	50	230	80	100	3.6

Mechanical Properties

Carbon steel Grade 460 is a very fine and high tensile carbon steel with D grade impact values. It is a weldable steel with a maximum carbon equivalent of 0.56%. Arc welding can be carried out using standard techniques and low hydrogen welding rods.

Ultimate tensile stress:	610 N/mm²
Minimum yield stress:	460 N/mm²
Minimum elongation:	19%
Youngs Modulus:	205 kN/mm2
Chary impact value:	27 J at -20⁰C
Maximum bar length:	11.8m

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This publication gives the design parameters currently used by Great Circle Rigging in the manufacture of its components. The company reserves the right to amend technical details as and where necessary in line with its policy of continuous development. For any further technical information please contact our Technical Department

Last revised: May 30, 2006 � Great Circle Rigging Ltd

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