Ngwa ngosi osisi n'ala nwere ahịrị abụọ na ọkwa asaa n'ụdị trapezoid, dabara maka ụlọ ngosi ihe eji arụ ọrụ na ụlọ nkwakọba ihe

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Ngwa ngosi osisi ala trapezoidal nwere ahịrị abụọ na ọkwa asaa nwere ike igosi ihe atụ osisi ala iri na anọ n'ozuzu. Ogwe osisi kacha ibu a pụrụ igosipụta bụ obosara 200 mm na elu 1500 mm, na usoro ngosi ahụ mara mma ma dị ejiji. Ọ dịkwa mfe iwepụta ihe nlereanya: nanị bulie ma dọta ha, ndị ahịa agaghị achọ ịtụgharị ha mgbe ha na-ahọrọ. Nhazi trapezoidal na-eme ka ngosipụta ngwaahịa ala osisi bụrụ ihe doro anya, ị nwere ike ịhụ agba na àgwà nhazi nke ihe nlereanya niile n'otu anya. Ngwa ngosi ala osisi a dị na ngwongwo n'ụlọ nkwakọba ngosi Masterxuan nke ụlọ ọrụ anyị. A na-ere ya ozugbo site n'aka onye nrụpụta ma a ga-ebuga ya ngwa ngwa. Ọ dị mma maka ngosipụta nlele n'ụlọ ahịa ihe ịchọ mma dị iche iche, dịka WPC (Wood Plastic Composites) ngosipụta ala osisi plastik, SPC (Stone Plastic Composites) ngosipụta ala nkume plastik, SWC (carbon) ngosipụta ala, ngosipụta ala LVT (LVT flooring), ngosipụta ala laminate, wdg. Ngwa ngosi ala nke ngwakọta nkume na plastik, ngwa ngosi ala osisi siri ike, ngwa ngosi ala ngwakọta osisi siri ike, ngwa ngosi ala laminate wdg.