Shell roof structures typically have shape like a curved and assemble to large structures, usually shell roof structure built by light weight constructions using shell elements. Thin shell is a shell with a small thickness dimension which deformations are not outsized compared to thickness. Shell structure has curving as different to plates structures which are flat. Shell membrane has flexural deformations when it got stresses that make the shell structure become a light weight strong roof structure. In this article we tried ...