Izithombo zaseTBR zingenza izikhuthazelo ezifanele kweemoto yenkantolo ngokubheka amagugu, uphawu kunye nekhishoni. Amamateriali wabo ababangise amathuluzi omncane kunye nomaiziphumo eziphakeme kwiindlela lethombo, okungcono ukuba bazingeza indlu eyahlukileyo ngaphandle kokucabanga komphakathi. Ngaphezulu kwebhedzetho noma umsindo oshesha, amathombo amaseTBR angakho inqanawa yezilungiselelo zemoto kunye nokuphatha komsebenzi ukuze bayisisekelwe ngempumelelo emibhaleni ayiqhubekayo.