ISSA CONSTRUCTION                                                                                                               

    INNOVATIVES BAUEN

    Dr.-Ing. Saher H. Issa

                                                                                          

                                          
 

 

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New Slab supporting system made from Ferro concrete according the principles of the ISSA

Formation and development

By this new method it is possible to build cost-effective parking garages made totally from Ferro concrete which could be adapted individually to difficult real estates. The slabs have on the top a slight decline and down double-sided they are curved. By the beam-free construction lower height between floors could be realised which have a comfortable space atmosphere with no refraction, no dust catcher and improved maintenance ability. Furthermore no corrosion protection is necessary and additionally the fire protection classification F90 is fulfilled. By the combination of the shell theory and the slab theory a new flexible, time and cost saving slab supporting system arose. This system attains large wingspan which minimizes the number of pillars.

Geometrical Attribute

The Issa slab appears in its bottom view as double curved spherical shape, a so called spacial bearing structure. The top view shows a platy slab thus as a plane bearing structure. By the scientifically combination of the slab theory and the shell theory it was possible to develop an economical and flexible Ferro concrete slab supporting system whereby as well large wingspan could be implemented. This offers the advantage that the bulk of the columns are not necessary with a gain in overview and flexibility.

History

During his civil engineering studies in Moscow Dr. Issa got already in touch with concrete shells. He built 1966 the first shell construction from quadratic pre-cast segments. The next intermediate step was the realisation of a pillar free shopping hall made from Ferro concrete.

On a base area of 18,0 x 24,0 m a shell construction was built of only one pre-cast segment. The rand elements were made from cast-in-place concrete. The size of the pre-cast segments were 0,66 x 9,00 m with a gage of only 12 cm.

Dr. Issa conducted several projects primarily residential premises and commercial buildings Dr. Issa in which the masterstroke was the construction of a stift- and summer free commercial building with a span of 15 x 15 m.
Based on his extraordinary experiences with the shell theory Dr. Issa developed a new slab supporting system. After completion of the theoretical basic principles it was time to proof the tremendous capacity in an early test 1996.
The size of the slab was 4,0 x 4,0 m and in the middle only 3 cm thick, in edge middle 8 cm and in the edges16 cm. After the very successful experiment the new ISSA-Slab was carried into effect by the construction of an underground parking garage. 

 
      

 Roofing of a courtyard, wingspan 15,0 x 15,0    Bottom view                                                 pre-cast segment

Press review (German newspspers and magazines)

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                                        Zuletzt geändert: Sonntag, 19 August 2007