Square yeeb nkab yog lub npe rau cov yeeb nkab square, uas yog, cov yeeb nkab steel nrog qhov sib npaug ntawm sab ntev.Nws yog ua los ntawm dov strip steel tom qab kev kho mob.Hloov mus rau cov yeeb nkab square: feem ntau, cov sawb hlau yog unpacked, leveled, crimped thiab welded los tsim ib puag ncig yeeb nkab, ces dov mus rau hauv ib lub square yeeb nkab los ntawm lub round yeeb nkab, thiab ces txiav mus rau hauv lub ntev yuav tsum tau.