2000 _ IKEA SHOPPING CENTRE in Katowice
The design has included the space column-beam steel structure which characteristics are as follows:

- columns are arranged in a rectangular 16x24m grid and founded on two levels - 0.0 and +5,3m which is a RC mezzanine structure level,
- a roof construction is determined by the 24m span pitched trusses every 5,3m spanned between the 16m truss girders and the columns every 24m,
- the shape constancy of the system was obtained by the one-sided fixed truss-column connections in both directions,
- the upper chord stiffness of the 2-pitched trusses is provided by vertical bracing in 8m spacing; the broken at the end, bottom chords of the trusses and girders were also braced,
- a 4x5m grid X-bracing of 10mm ropes, and the trapezoidal sheeting of 130mm depth were adopted on the roof,

According to the posed requirements the roof was secured against deformations induce by the mining damages i.e. the joint expansions were designed by the truss doubling in first and the sliding supports in second direction,
On the roof were also installed 7 air conditioning units of various weight 6-12t.