Steel-clad wood is a new type of building materials, the steel-clad wood is made of hot-dip galvanized square steel pipe processing and production, is to replace the traditional template support wood keel (wood square) of the new product, the product belongs to the conservation and environmental protection products, in practical engineering applications, can save 90% of wood, turnover times are more than 40 times of wood square, easy to store, easy to transport, convenient construction, strong versatility, zero loss, Reduce the cost, with obvious economic and social benefits, the sales price of this product is only 3 times the price of wooden keel (wooden square road), and the number of uses is 40 times that of wood. The main use is in building construction, the support of wall panels and roof. Steel-wood keel, high flatness, good smoothness, anti-distortion, large load, strong versatility, long service life, good retention rate, energy saving and environmental protection. Steel-clad wood is galvanized square steel pipe with wall thickness of 1.8mm and galvanized content of 60-80 grams per meter. By double-sided stamping and opening molding, that is, the weight is reduced and the load is reduced. The filling material inside the keel is the whole Douglas fir or hemlock pine, the wooden square is seen on all sides, there is no standard leather joint, and the assembly fullness reaches more than 95%. Steel keel Steel keel Steel keel Steel keel is a continuous hot galvanized sheet strip as raw materials, rolled by cold bending process of metal framework for construction. The use of steel keel makes the concrete structure beautiful and more flat: because of the high strength of steel keel, there is almost no deformation when it is subjected to the pressure of concrete, so the geometric size standard, flatness and brightness are higher after the concrete construction. Common length specifications mm: 1000,1500,2000,2200,2400,2700,3000,3200,4000, etc., at the same time, there are connecting sleeves, and can be connected to any required length. In practical engineering applications, the steel keel market can save 95% of wood, the turnover is more than 40 times that of wood keel, and the service life can reach more than 15 years. The product has light weight and load