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Foundation Anchor Solutions for Wind Turbines

 

The benefits of using the Macalloy bar have been widely reconiced across the construction industry and it is now used extensively in many different structral applications. Among these are several applications suited to the wind turbine market.

 

The wind farm at Uljabuouda consists of a total of 10 3MW wind turbines, with a total annual production of 80 GWh. The turbines supply electricity to more than 3000 homes.

 

To each turbine tower are installed 136 pc. 40 mm bars at approximately 2.6 m long were supplied to each wind turbine, using Denso/ PVC tape for corrosion protection and as the duct for the tension bar.

 

 

Mechanical Properties for nominal ultimate strength 1030 N/mm²

Grade

Nominal 0.1% proof stress

 

Minimum elongation

 

Approximate modulus of elasticity

 

 

N/mm²

%

k/mm²

Macalloy 1030, 25-40mm

835

6

170

Macalloy 1030, 25-40mm

835

6

205

Macalloy 1030, 25-40mm

835

10

185

Bars are supplied with a range of fittings, including nuts, washers, plates and couplers. Spherical nuts and washers are also available to accommodate up to 3 degrees of rotation. All fittings are designed to exceed the failing load of the threaded bars.

Characteristic Loads

Nominal Bar Diameter mm

20**

25

26,5*

32

36

40

50

75

Stressing Capacity kN

226

354

398

580

734

907

1415

3018

0,1% Proof Load kN

262

410

460

670

850

1050

1639

3495

Failling Load kN

323

506

569

828

1049

1295

2022

4311

Nominal Bar weight kg/m

2,53

4,09

4,58

6,63

8,35

10,3

15072

33

*Available in Carbon steel only.

** Available in Stainless steel only.