Sirhelela ndhawu ya wena hi swilotlelo swa hina swa mortise leswi tirhaka hi matimba , leswi akiweke hi xikongomelo xo fikelela swipimelo swa vuhlayiseki swa Ustralia (AS 4145.2) naswona u tiyisela swiyimo swo tika swa ndhawu. Swilotlelo leswi swa matirhelo ya le henhla swi hlanganisa ku lwisana ka ku nghena hi ku sindzisiwa loku kamberiweke ni ku akiwa loku nonon’hwaka ka maxelo leswaku ku va ni nsirhelelo lowu tshembekaka, wa nkarhi wo leha.