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TOWER
Figure 9.7 shows the tower base:
88
Figure 9.7: Tower base
The 6 m gin pole (5) has a diameter of ø101.6x6.30 mm and it is used in the erection of the
wind turbine, described in section 9.4. The two guy wires adjacent to the gin pole are at-
tached to it in order to prevent the joint between the tower and the gin pole from being
overloaded during erection and lowering of the wind turbine. The joint is strengthened
with a 6 mm support plate (6) that is welded on both sides.
The tower base hinge consists of a 20 mm tower base plate (8), upon which two 20 mm
steel plate hinges (9) are welded. The latter are supported by 6 mm triangular steel plates
(10) that are welded onto both the tower base plate and the hinges. A ø40x270 mm shaft
is used as pivot pin (7), which slides in a ø50.0x5.00 mm sleeve, welded to the tower. The
tower base plate is mounted onto the foundation with 4 pcs. M16 bolts that make up a
300x300 mm pattern. Design and dimensioning of the bolts and the foundation for both
the tower and the guy wires is very site specific and largely dependent on the structure of
the soil.