Lihlahisoa tsa rona tsa khalase ea Tempered U profile / U li kopana le litlhoko tse sebetsang mabapi le § 8, Fragmentation le § 9.4, matla a mochine joalokaha ho boletsoe ho European standard EN 15683-1 [1] ha e lekoa ho latela EN 15683-1 [1] le EN 1288-4 [2].
