When the inside of the building is required to be open without any walls or pillars then the shell roof is very useful than flat or even pitched roof.
Concrete shell roof construction details.
The first concrete shell dates back to the 2nd century.
In shell projects special attention must be paid to supports since significant flexion requests may occur in these areas.
The shells roofs are lighter in weight and save reinforcing steel and concrete.
Of course a concrete roof requires more support than a typical wooden roof.
Well known examples of structures that must demonstrate three dimensional structural integrity are aircraft fuselages and ship hulls especially submarines and oil.
The approach to disaster resistant home construction requires that the entire exterior shell walls floors and roofs of the house be monolithic reinforced concrete in character.
A concrete shell also called thin shell concrete structure is composed of a thin shell of concrete formed in such a way as to be self supporting often with no interior columns or exterior buttresses the shells are most commonly flat plates and domes.
Interior support beams can help but the construction works best when concrete walls floor and roof form a solid shell.
They can also take the form of ellipsoids or cylindrical sections.
The first concrete shell dates back to the 2nd century.
A shell roof is commonly used in public building because shell roof is aesthetically pleasing.
Concrete weighs a lot and the outside walls have to be capable of supporting the giant slab.