Alaabta ayaa lagu dabaqi karaa heerka tijaabada EN149: Qalabka ilaalinta neef-mareenka-mask-ka-hortagga walxaha-ka-hortagga ah; Heerarka la jaanqaadaya: TS EN149: 2001+ A1: 2009 Qalabka ilaalinta neefsiga ee lagu sifeeyay shuruudaha nus-maskeedka tijaabada 8.10 tijaabada xannibaadda, EN143 7.13 iyo heerarka kale ee imtixaanka.
Mabda'a tijaabada xannibista: shaandhada iyo maaskaro xannibista tijaabiyaha waxa loo isticmaalaa in lagu tijaabiyo cadadka boodhka lagu ururiyey shaandhada, caabbinta neefsiga ee muunadda tijaabada iyo gelitaanka shaandhada (permeability) marka socodka hawadu ka soo gudubto shaandhada iyada oo la nuugi doono qaar ka mid ah. bay'ada siigada oo waxay gaartaa caabbinta neefsiga.