Flat simbi inoreva simbi 12-300 mm yakafara uye 3-60 mm gobvu ine rectangular chikamu uye zvishoma blunt kumucheto. Flat simbi inogona kupera simbi, zvakare inogona kushandiswa seyakaomeswa pombi isina chinhu uye yakatetepa slab ye laminated sheet. Iyo ukobvu ndeye 8 ~ 50mm, upamhi i150-625mm, kureba kuri 5-15m, uye chigadzirwa chakatarwa span chakakora, chinogona kusangana nezvinodiwa nevashandisi. Panzvimbo yepakati ndiro, inogona kusunganidzwa zvakananga pasina kucheka.