Siam Steel Gratings Co., Ltd. and its subsidiaries, including Siam Steel Tower Co., Ltd., Siam Steel Galvanizing Co., Ltd., Rayong Galvanizing Co., Ltd., PWH (Thailand) Co., Ltd. and CHC Engineering Co., Ltd. produce steel gratings, galvanizing, manufacture and install high-voltage power pole structures, conveyor belt systems, power station construction, solar panel project installation, and rooftop solar power generation system
