Siam Steel International Public Company Limited, together with its subsidiaries, engages in the manufacture and sale of steel office equipment, and furniture parts in Thailand. The company is involved in construction business. Its steel and wooden furniture products include cabinets, lockers, and combine furniture systems; desks and tables; chairs; partitions; safes; shelving systems; and furniture for stadiums comprising bleachers and folding stages. In addition, the company provides prefabricated building systems that consist of permanent buildings, which includes business hotels, convenience stores, showrooms, etc.; temporary buildings, such as mobile offices, mobile clinics, mobile toilets, etc.; and storage buildings, which consists of telecom shelters, warehouse units, soundproof rooms, etc. Further, it offers special products, such as flood protection panel and related products, bathroom pods, smart wall systems, earthquake and seismic retrofits, bulletproof security products, and steel structure solutions, as well as building materials, including doors, staircases, etc. Additionally, the company invests in solar energy plants and alternative energy; and manufactures and distributes solar equipment and fuel stick. Furthermore, it manufactures and distributes plastic laminate products, and motorcycle parts, as well as offers electrical appliances and supplies, such as wire, pipe, and downstream equipment. The company provides nursing facilities and offers movable instant office and restroom nstant facilities. It offers its products under the Lucky, Kingdom, Siamsteel, Okamura, Chitose, and Pilot brand names. The company was founded in 1953 and is headquartered in Phra Pradaeng, Thailand.