Magalasi athu amtundu wa Tempered U / U amakwaniritsa zofunikira zokhudzana ndi § 8, Fragmentation ndi § 9.4, mphamvu zamakina monga zanenedwa mu European standard EN 15683-1 [1] poyesedwa malinga ndi EN 15683-1 [1] ndi EN 1288-4 [2].