Strands - For Postensioning of Concrete

Emcocables produces a wide range of wires and strands with high carbon content; these are used in the most important civil engineering works.

Their uses are very extensive in the field of prefabricates due to the advantages gained by weight, resistance, and functionality easily surpass those strands of low carbon content that are used traditionally.

Due to the importance that railway concrete crossbeams have acquired, Emcocables S.A. produces a strand for railway concrete crossbeams whose use has been increasing throughout the world due to its greater resistance and duration.

Break load requirements

Nominal Cable Diameter			Cable Break load Lbk (Kn)	Nominal steel cable area inches2 (mm2)	Nominal cable weight lb/1000ft (kg/1000m)
GRADE 250
	Inches	(mm)
1/4	(0,250)	6,35	9000 (40,0)	0,036 (23,22)	122 (182)
5/16	(0,313)	7,94	14500 (64,5)	0,058 (37,42)	197 (294)
3/8	(0,375)	9,53	20000 (89,0)	0,080 (51,61)	272 (405)
7/16	(0,438)	11,11	27000 (120,1)	0,108 (69,68)	367 (548)
GRADE 270
3/8	(0,3570)	9,53	23000 (102,3)	0,085 (54,84)	290 (432)
7/16	(0,438)	11,11	31000 (137,9)	0,115 (74,19)	390 (582)
1/2	(0,500)	12,70	41300 (183,7)	0,153 (98,71)	520 (775)
	(0,600)	15,24	58600 (260,7)	0,217 (140,00)	740 (1102)

Requirements of resistance to fluency

Nominal Cable Diameter			Initial Load LbF (kN)	Minimum load for 1% extension LbF (kN)
GRADE 250
	Inches	(mm)		Normal Relaxation	Low Relaxation
1/4	(0,250)	6,35	900 (4,0)	7650 (34,0)	8100 (36,0)
5/16	(0,313)	7,94	1450 (6,5)	12300 (54,7)	13050 (58,1)
3/8	(0,375)	9,53	2000 (8,9)	17000 (75,6)	18000 (80,1)
7/16	(0,438)	11,11	2700 (12,0)	23000 (102,3)	24300 (108,1)
1/2	(0,500)	12,70	3600 (16,0)	30600 (136,2)	32400 (144,1)
	(0,600)	15,24	5400 (24,0)	45900 (204,2)	48600 (216,2)
GRADE 270
3/8	(0,375)	9,53	2300 (10,2)	19550 (87,0)	20700 (02,1)
7/16	(0,438)	11,11	3100 (13,8)	26350 (117,2)	27900 (124,1)
1/2	(0,500)	12,70	4130 (18,4)	35100 (156,1)	37170 (165,3)
	(0,600)	15,24	5400 (24,0)	45900 (204,2)	48600 (216,2)