What Is Engineered Lumber?

The main material of the project refers to the main raw materials and main materials used in the installation project. The main materials are generally speaking from the main body, cost, efficiency, and usage. The main material is relative to the auxiliary material.

Engineering main material

Generally speaking, installation works only

For example, in the installation of central air-conditioning projects, auxiliary materials are welding rods, iron sheets, paint, etc., and the main materials of the project are central air-conditioning hosts.

The so-called "five main materials" such as steel, wood, cement, glass, and asphalt, which account for a large proportion of the cost of construction and decoration engineering materials. However, according to the specific project, the materials included in the main materials of the project are not fixed, and they generally refer to the materials that constitute the main influence on the cost of the building. Generally speaking, in civil engineering, the "three materials" must be the main materials, that is, steel , Wood, cement. However, in some places, flooring and valuable decorative materials are also classified as main materials, such as blocks, sand, stone, doors and windows, and marble slabs.

In the installation project, the main solid material constituting the sub-item is the main material. For example, the main material for steel pipe installation is steel pipe, the main material for wire installation is electric wire, and the main material for lamp installation is luminaire; stone engineering mainly refers to granite, marble, sandstone and other stones. It is the main material of the project. The main material in a certain partial project may also be an auxiliary material in the overall project.