Bis Certification For Steel Windows For Industrial Buildings IS 1361:1978 has been issued by the Bureau of Indian Standards and prescribes the requirements for steel windows used in industrial buildings. This standard helps to guarantee that the windows are constructed with the proper design, strength and corrosion resistance in order to withstand harsh industrial environments. It includes dimensions, materials, fabrication, glazing bars and finish details. The standard ensures consistent and long lasting production for the safety and functionality of the product. Manufacturers are required to have a BIS Certificate to sell these in India. The ISI Mark, which signifies conformance to national quality standards, is mandatory on steel windows to guarantee dependability for industrial infrastructure purposes.