Bangkok Steel Industry Company Limited had registered its business since December 17, 2507 BE. Our first operation is manufacturing round and deformed concrete steel bars.

At present, our company is able to manufacture the following products per year: 1,000,000 tons of steel bars and steel wires, 320,000 tons of galvanized steel sheets, 24,000 tons of prepainted galvanized steel sheets and 120,000 tons of other products of steel wires.

- In 2516 BE, an electric arc furnace was installed.
- In 2526 BE, continuous galvanized steel sheets were manufactured by applying Japanese technology. In this regard, we are accepted as the first manufacturer in Thailand.
- In 2530 BE, the company was authorized to be an agent for selling hoist and cranes under the trademark Konecranes from Finland. Moreover, we are able to single – handedly manufacture track cranes for industrial factories. Then our factory has been expanded into Ayudhaya.
- In 2535 BE, the second factory manufacturing galvanized steel sheets as well as a factory manufacturing prepainted galvanized steel sheets were built.
- In 2539 BE, another steel bar factory was constructed in Samutprakarn.
- In 2539 BE, one more steel bar factory was constructed in Nakhon Ratchasima Province under the name Ratchasima Steel Products Company Limited to manufacture both deformed bars and round bars as well as various sizes of wire rods.
- In the year 2547 BE, Asian Wire Products Company Limited was established to manufacture various products made of wire rods such as cold drawn wires, barbed wires, nails of various types, binding wires, galvanized wires.
- In 2558 BE, the company operations were expanded to galvalume manufacturing.
- In 2559 BE, a maintenance service became a part of the company expansion. This service has been manipulated by our experienced technicians and engineers. It first started at the maintenance of hoist and cranes. In the future, the expansion will focus on other types of maintenance such as installation and services of water, electricity and air conditioning systems. In addition, the maintenance of roofs and roof structures will be included in the expansion.