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I. Technical Overview
Prefabricated timber structure buildings are a new type of timber structure building where some or all of the wooden components are prefabricated in a specialized factory and then transported to the construction site for assembly. Prefabricated construction represents a fundamental revolution in traditional construction methods. Compared to traditional methods, prefabricated construction significantly shortens factory construction time. By employing factory assembly line production and rapid on-site hoisting, it greatly improves project quality and construction speed, reduces on-site work, and offers significant benefits in energy conservation, material saving, and noise reduction. This invention utilizes fast-growing larch from plantations that has undergone mechanical stress grading to manufacture prefabricated cross-laminated timber (CLT) floor panels. This addresses the problems of low strength, poor material quality, and poor dimensional stability inherent in plantation timber. Compared to other on-site processed floor panels, it offers advantages such as stable product quality, controllable strength, good dimensional stability, and rapid and convenient construction, better meeting the needs of timber structure buildings. The use of plantation timber ensures a wide availability of raw materials, reducing production costs and increasing product added value.
II. Technical Features
As shown in the right figure, the prefabricated floor slab of this invention comprises: a load-bearing structural layer (composed of multiple layers of sawn timber or structural composite material and fastened with metal fittings), a bottom decorative layer (eliminating the need for later decoration), a surface decorative layer (eliminating the need for later flooring installation and preventing vibration), and a side sealing layer (for later hoisting and sealing). This invention uses multiple layers of sawn timber or structural composite wood glued at a specific angle and rationally assembled, and fastened with metal fittings. The resulting floor slab possesses excellent mechanical properties (average bending modulus of elasticity of 11.80 GPa, bending strength of 46.01 MPa, interlaminar shear modulus of 172 MPa, and interlaminar shear strength of 3.37 MPa). It offers advantages such as high load-bearing capacity, good dimensional stability, quick and convenient installation, and elimination of the need for later decoration, meeting the requirements of timber structure buildings for the mechanical properties and rapid installation of floor slabs during assembly.
III. Market Prospects
In recent years, with social development and the improvement of people's living standards, as well as the Ministry of Housing and Urban-Rural Development's vigorous promotion of green building materials, green buildings, and prefabricated construction, prefabricated timber structures in China have broad development space and market potential. This achievement conforms to the current trend of timber structure development, can improve construction speed, reduce production costs, and increase the added value of plantation timber products, and has good development prospects.