6.2.3   Securing of the coils
The coils are secured according to the principles in chapter 5. The friction coefficient is taken as 0.3 due to non-existing form fit. Thus, a residual securing demand remains against longitudinal accelerations of 0.7 g and transverse accelerations of 0.5 g.

The residual longitudinal securing effort of 27 · 0.7 · 9.81 = 185 kN is achieved by lashings and additional pressure elements to the end walls and corner posts. Also among each other the coils are longitudinally braced with timbers. These timbers consist of three scantlings of 15 x 15 cm cross-section in each intermediate space, secured against falling loose. At the end walls, strong cross beams are inserted, which are jammed against the corner posts and also have contact to the end walls.

Due to the arrangement of the securing points, only 8 of them are loaded simultaneously. Considering the securing situation in the intermediate spaces, only four of the securing points are found to bear simultaneously to fore or aft.

Figure 26: Longitudinal lashing of the coils

Figure 27: Longitudinal and transverse bracing of the coils

The residual transverse securing effort of 27 · 0.5 · 9.81 = 132 kN is exclusively realised by 9 timber braces of 10 x 10 cm cross-section to each side.

The arrangement is checked by a balance:

Longitudinally: (between the coils with 15 x 15 cm timbers)

 1 · 9.81 · 18 ≤ 0.3 · 18 · 9.81 + (4 · 10 + 3 · 225 · 0.3) / 1.5
 177 ≤ 53 + 162
 177 < 215 Balance is well met!

Transversely: (all coils with 10 x 10 cm timbers)

 0.8 · 9.81 · 27 ≤ 0.3 · 27 · 9.81 + (9 · 100 · 0.3) / 1.5
 212 ≤ 79 + 180
 212 < 259 Balance is well met!

The securing effort is comparable to that of the previous example. The quality, however, is more important due to the greater masses.

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