Sprech Tenso-Structures Pvt. Ltd. Offers Round Arched Shaped Structure Module. Sprech Tenso-Structures Pvt. Ltd. Has obtained ISO 9001:2000 certifications. Round Arched Shaped Structure Module is based on the use of an innovative [patented] fabric connection which simplifies the construction and installation of complex roofs through very simple elements. Round Arched Shaped Structure Module is used to cover big areas for catering, tourist spots, events etc. It is available in the model name of ARCO TUNNEL.