(1) Roof Structure: There are three kinds of roof structure, namely, arched roof, pitched roof and semi-dome roof. Every span has one or several roofs. A greenhouse can be built into many spans in large area.

(2) Structure of Outside-Shading Skeleton: The outside shading system is fixed by the uprights and beams. The section of the upright is rectangular, and the beam is located above the greenhouse.

3) Primary Load-Carrying Materials and Connecting Materials

a) The primary load-carrying materials include upright, gutter and trusses. The section of the upright is rectangular.

b）There are many kinds of suitable connecting materials, such as roof connectors, roof-gutter connectors, gutter supporters.

 Qingdao NORDAL Supply Chain Co., Ltd. is located in Qingdao City, Southern    District, the company has a master English, Japanese, German, Korean and other multilingual business strong professional team. The main lines of business of the company include the greenhouse glass greenhouse, skeleton system, aluminum system, the sunshine board multi-span greenhouse, film greenhouse, covering materials, arch shed, shade system, window system, heating system, cooling system, sunlight Greenhouse, seedbed and irrigation systems and soilless cultivation systems and other related products import and export trading company. Since its inception, the scale of operation has been expanding, performance increased year by year, customers have been all over Southeast Asia, the Middle East, Europe, the Americas, Australia and other countries and regions around the world.

The company has always been to serve as the guide, innovation and development, and strive to provide first-class products and professional sound services, high-quality to meet customer requirements and expectations, and jointly create a more brilliant performance.