United Ivory Sdn. Bhd. is a subsidiary of Tong Yong Metal Sdn. Bhd. which was established in 1980 as a machinery making and steel servicing centre. Apart from supporting cable bridge projects for the largest electricity provider across Malaysia, we have diversified our products to cater the building and construction industry. Our best-selling products include metal doors and window frames. In 1999, we have revolutionised the industry and transformed the features of architecture through the invention of our UNI-Interlocked steel roof truss system.