H-beam is made from plywood and spruce timber.It's used for construction concrete. Shangdong Xingang Group is the largest manufacturer of formwork and associated products in China which was founded in 1993 with 9 subsidiaries, Such as Xingang Wood Co.,Ltd, Xingang International Formwork Co.,Ltd, Xingang Real-estated Co.,Ltd, Xinfeng Construction Co.,Ltd, Xingang Concrete Co.,Ltd, Xingang Gulf ...