Our Company

Since 1976, the Company started their activities as a one-man business and grow through the years serving steel structure projects in Indonesia. PT. Gerbang Saranabaja was established on February 18, 1992 and our goal is to be a partner of first choice in the delivery of integrated steel structure works and construction services.

Today, with the annual capacity more than 15,000 tons, we have expanded our capabilities in order to meet the clients' needs and expectations. We are now one of the foremost in the field of steel structure fabrication and construction in the country. Within a quarter century of our existence, we have proven our commitment to adding value to our clients sustained operation. Most of the clients have been with us for more than five years with an imposing level of repeat business.

Our culture of innovation, professionalism, tenacity and spirit is the foundation of this ongoing success. The ISO 9001 certification awarded to us on May 27, 2002 imprinted acknowledge this culture and international standards in our consistenly high quality of services.

In 2003 we developed our business on Pressure Vessel, Boiler and Heat Exchanger. With the culture of innovation, professionalism and full spirit finally the "S", "U" and "U2" stamp awarded to us on August 12, 2004. This certificate appointed as an authorized company to use the Indicated Symbol of The American Society of Mechanical Engineers (ASME) for the scope of activity shown below in accordance with the applicable rules of the ASME Boiler and Pressure Vessel.


To provide professional services and excellent quality products in Steel Structure and Pressure Vessel, and added value to customers, employees, owner and society.


Being the best as Steel Construction and Pressure Vessel Company, which grow and thrive in global competition.


Giat bekerja dan bertakwa kepada Tuhan YME (Ora et Labora)
Etika, sikap mental positif dan motivasi tinggi (ethics, positive mental attitude and high motivation)
Respek terhadap semua pihak (Respects to others)
Budayakan Teamwork dan Total Quality (Habituate Teamwork and Total Quality)
Antusias menciptakan lingkungan kerja harmonis (Enthusiastic in building harmonius woking environment)
Nilai tambah kepada pelanggan, karyawan, vendor, partners, pemilik, dan masyarakat (Value added to costumers, employee, vendor, partners, owner and society)
Gerakan disiplin (Habituate Discipline)

History of PT. Gerbang Saranabaja

In 1976, Mr. Aluinanto Sandjaya (the owner) has an initiative to start a steel construction business under the name CV. Jaya Raya. In the beginning it undertakes the function of steel fabrication for simple and light construction due to limited workshop facilities.

Through hard work and consistency in quality, we are able to improve gradually our facilities so that we can receive and perform more and more complicated and heavy structures for buildings and other purposes.

After 16 years of experience and knowledge in the steel fabrication business, we change the name legally from CV. Jaya Raya to PT. Gerbang Saranabaja (abbr. PT. GSB) on 18 February 1992.

Our long experience in handling projects either with main contractors or project owners enable us to build a strong relationship with them. Our competencies are proven by overcoming the critical period during the Indonesian monetary crisis in 1998-2001. We strive always to give the best services to all of our customers.

For this reason we are awarded with the ISO 9001:2000 Certificate in year 2001 by SAI Global Services. Along with the spirit of Growth for Better Services, we expand our business unit in Pressure Vessel. In the last 4 years the Pressure Vessel unit together with steel structure is successful in building Engineering, Procurement and Construction (EPC) Project scope for Liquefied Petroleum Gas (LPG) Plant.

We strongly believe that continuous improvement should be happened in our management system, people competencies, information-system as well as workshop facilities.