Ugqinsi lwe-wallboard luyi-50mm, futhi ukucindezelwa kwangaphakathi kokucisha imvamisa okumaphakathi kanye nokushisa kukhulisa ukuminyana, ukuqina, amandla, ukuqina, nokusebenza kokuqhutshwa kwebhodi lodonga, ukwelapha ukuguga okuzenzela, ukucutshungulwa kwesikhungo esikhulu semishini ngamabili, amandla aphezulu. nokunemba okuphezulu.