1.owne. aththiwaram kiyanne biththi nagganna yawana diga aththiwarama. Base walawal kiyanne kanu walata dana aththiwarama. Sinhala wachana
2. Aththiwarama udin thini reinforced concrete beam ekak yawanawa loads evenly distribute katannai eka eka magul nisa than than wala aththiwarama yata polawa weak wela ethana bahala biththi crack wena eka nawaththannai biththi pamulai kanu tikai ekata yaa karala tie karanna.
3. Ow. Naththan thintha tika bittiya uragannawa
4. Goo yanawa toilets walin catch pit ekata. Eken manhole ekata. Ethanin thama public sewerage line or septic tank ekata yanne. Manhole eka minihekta bahina size ekata lokui