The ratio of its column-height to column-diameter is 7:1.

The ratio of height to diameter of the columns is 7:1

The diameter of the structural columns ranging from 60.96cm to 33.02cm the ground floor to the floors 12 and 13.

The end connections join adjacent sections of casing string of the same diameter.

Preferably diameter (d) of the pipes (21) is smaller than the heights (H) of the poles (22).

The inner cladding region has a lattice of large diameter columns (36).

The present invention addresses these disadvantages and is particularly suitable for columns having a diameter of at least 3.5m (11 ft).

The improved adhesion of the monoliths enable the preparation of capillary columns with an internal diameter (I.D.) ≥50µm.

However, the risers for one drilling center are of a smaller diameter than the risers for the other drilling center.

Columns having a diameter larger than 5000 mm and specially designed components therefor

Small-diameter extremities of the two stepped guide columns are arranged upwards on the upper fixed plate (4).

The slipforming means is intended for slipforming hollow, inclined columns having increasing and/or decreasing diameter.

The columns may be capillary columns or conventional-scale columns.

The corner columns are slightly larger in diameter.

The upper slide plate (6) is sleevedly fitted respectively onto the small-diameter extremities of the two stepped guide columns.