T T J Holdings Limited, an investment holding company, engages in the design, supply, fabrication, and erection of various structural steel works in Singapore, Malaysia, and Thailand. It operates through two segments: Structural Steel Specialties and Waste Management and Treatment. It offers structural steel works used in the construction of buildings, factories, plants, and infrastructures; and fabricates and installs various cranes and lifting equipment used in shipyards, factories, and construction sites, as well as handles heavy lifting operations, such as launching of heavy trusses, viaduct beams for MRT, and LRT. The company also designs and develops various standard two-rail and three-rail aluminum parapets for use in flyovers and expressways; and fabricates and installs various bomb shelter doors for the HDB, MOE, and SMRT. In addition, it manufactures and sells wood pallets and chips; and operates dormitories and testing centres; and provides engineering and construction contract services. T T J Holdings Limited was founded in 1981 and is based in Singapore.