Suppliers of rebar, wire rod, mesh, prestressing wire and strand worldwide
MEGASTEEL LLP

SPECIFICATIONS

Dimensions and Properties of Low Relaxation Strand and Wire for Prestressed Concrete.

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BS5896.1990 PRESTRESSING STRAND
Nominal
diameter
in mmNominal
tensile
strength
in N/mm2Nominal
steel area
in mm2Nominal
mass
in g/mSpecified
characteristic
breaking
load in kNSpecified
characteristic
0.1% proof
load in kNLoad at 1%
elongation
in kNElongation at
maximum load
Lo > 500 mm in %RelaxationMass
relaxation
after 1000hrs.
Relaxation
class 2.
For all
strandsInitial load
(% of actual
breaking load)
for all
strands7-wire
standard
strand15,216701391090232197204>3,51,0%

2,5%

4,5%60

70

8012,5177093730164139144>3,511,0177071557125106110>3,59,3177052408927881>3,57-wire
super
strand15,718601501180279237244>3,512,91860100785186158163>3,511,3186075590139118122>3,59,61860554321028790>3,58,0186038298705961>3,5
BS5896.1990 PRESTRESSING WIRE
Nominal
Diameter
in mmNominal
tensile
strength
in N/mm2Nominal
proof stress
in N/mm2Nominal
cross
sectional
area
in mm2Nominal
mass
in g/mSpecified
characteristic
breaking
load in kNSpecified
characteristic
0.1% proof
load in kNLoad at 1%
elongation
in kNElongation at
maximum load
Lo * 200 mm in %RelaxationMass
relaxation
after 1000hrs.
Relaxation
class 2.
For all
wiresInitial load
(% of actual
breaking load)
for all
wires41670139012,698,921,017,517,9>3,51,0

2,5

4,560

70

8041770147012,698,922,318,519,0>3,54,51620135015,912525,821,421,9>3,551670139019,615432,727,221,8>3,551770147019,615434,728,829,5>3,561670139028,322247,339,340,2>3,561770147028,322250,141,642,6>3,571570130038,530260,450,151,3>3,571670139038,530264,353,454,7>3,5

All strand and Wire is manufactured to BS5896(1980) prEN10138-3.2 and prEN10138-2.2 or any other internationally recognised standard. The Wire may be supplied spiral ribbed or chevron indented to suit customers requirement.

Load Extension Behaviour - The recommended Modulus of Elasticity for strand is 195 + -10 kN/mm2 and for wire is 200 + -10 kN/mm2

Relaxation - The guaranteed maximum relaxation losses for all Low Relaxation strand and wire at 20 C from 70% of initial load after 1000 hours is 2.5%

Coil Weight and Dimensions - Strand is normally supplied in production lengths which may contain welds made before wire drawing. Production lengths of strand can be supplied in varying weights from 2.5 to 4.5 tonnes to suit customers’ requirements. Wire can be supplied in coil weights from 500kg's to 2500kg's.

Protection - All material will be supplied export wrapped unless other wise requested.