用专业的眼光传播价值。

养殖是指培育和繁殖动植物。养殖包括家畜养殖、家禽养殖、水产养殖和特种养殖等种类。

第一部分 国家政策

国家支持农村集体经济组织农民和畜牧业合作经济组织建立畜禽养殖场、养殖小区，发展规模化、标准化养殖。乡（镇）土地利用总体规划应当根据本地实际情况安排畜禽养殖用地。农村集体经济组织、农民、畜牧业合作经济组织按照乡（镇）土地利用总体规划建立的畜禽养殖场、养殖小区用地按农业用地管理。畜禽养殖场、养殖小区用地使用权期限届满，需要恢复为原用途的，由畜禽养殖场、养殖小区土地使用权人负责恢复。在畜禽养殖场、养殖小区用地范围内需要兴建永久性建（构）筑物，涉及农用地转用的，依照《中华人民共和国土地管理法》的规定办理。

第二部分 冷弯薄壁型钢在规模化养殖场中的应用案例

生猪养殖最早是散养模式起步的，家家户户都会养几头猪，直至目前在很多地区，养猪都是农村家庭收入的主要经济来源。

长期以来养猪业一直延续散户养殖的老路，散养模式在不同的年代都发挥着其历史作用。但这种模式也日益暴露出它的弊端，生产不稳定、猪价暴涨暴跌、饲养成本高、养殖效益低下等，严重影响着养殖户的收益，也给市场带来了不稳定的因素。

随着社会的不断发展，规模化是养殖业的必然趋势。因为规模化养殖不但可以有效地节约社会资源，降低成本，也有助于市场的稳定，改变当前供求关系不合理的现状。

规模化养殖也有效推进技术进步，而且是实施标准化生产、提高畜产品质量的必要基础，这也是非常符合当前消费者健康、安全的消费理念的。

然而，一切的基础都是先要有场所，轻钢猪圈，牛棚，鸡窝了解一下？

以下案例来源于国外

Cold-formed steel is widely used in buildings, automobiles, equipment, home and office furniture, utility poles, storage racks, grain bins, highway products, drainage facilities, and bridges. Its popularity can be attributed to ease of mass production and prefabrication, uniform quality, lightweight designs, economy in transportation and handling, and quick and simple erection or installation.

冷弯型钢广泛应用于建筑、汽车、设备、家庭办公家具、电线杆、仓储货架、粮仓、公路产品、排水设施、桥梁等。它的普及可以归因于易于大规模生产和预制，统一的质量，轻量化的设计，运输和装卸的经济，快速和简单的组合或安装。

In building construction, cold-formed steel products can be classified into three categories: members, panels, and prefabricated assemblies. Typical cold-formed steel members such as studs, track, purlins, girts and angles are mainly used for carrying loads while panels and decks constitute useful surfaces such as floors, roofs and walls, in addition to resisting in-plane and out-of-plane surface loads. Prefabricated cold-formed steel assemblies include roof trusses, panelized walls or floors, and other prefabricated structural assemblies. Cold-formed steel possesses a significant market share because of its advantages over other construction materials and the industry-wide support provided by various organizations that promote cold-formed steel research and products, including codes and standards development that is spearheaded by the American Iron and Steel Institute (AISI). 

在建筑施工中，冷弯型钢产品可以分为三类:构件、面板和预制组件。典型的冷弯型钢构件，如螺柱、轨道、檩条、梁和角钢主要用于承载荷载，而面板和甲板构成有用的表面，如地板、屋顶和墙壁，除了抵抗平面内和平面外的表面荷载。预制冷弯型钢组件包括屋顶桁架、镶板墙或地板，以及其他预制结构组件。由于冷弯型钢相对于其他建筑材料的优势，以及由促进冷弯型钢研究和产品的各种组织提供的全行业支持，包括由美国钢铁协会(AISI)牵头的规范和标准开发，冷弯型钢占有重要的市场份额。

Cold-formed steel applications can be traced back as early as the 1850s in both the United States and Great Britain. In the late 1920s and early 1930s, cold formed steel entered the building construction arena with products manufactured by a handful of fabricators. Although these products were successful in performance, they faced difficulties with acceptance for two reasons: (1) there was no standard design methodology available, and (2) cold-formed steel was not included in the building codes at that time. Many of the cold-formed steel applications were unable to be used due to the lack of design methodology and product recognition.

在美国和英国，冷弯型钢的应用可以追溯到19世纪50年代。在20世纪20年代末和30年代初，冷弯型钢进入了建筑建筑领域，其产品由少数制造商生产。尽管这些产品在性能上是成功的，但由于两个原因，它们面临着难以接受的困难:(1)没有可用的标准设计方法，(2)当时冷弯型钢没有包括在建筑规范中。由于缺乏设计方法和产品认可，许多冷弯型钢应用程序无法使用。

Cold-formed steel products are shaped at ambient temperatures from steel sheet, strip plate or flat bars by roll-forming machines, press brakes or bending brake operations. They can be produced in large quantity and at high speed with consistent quality. A typical automated rolling machine can run at a speed range of 75-400 feet per minute, and the products can be as small as a three-quarter inch wide cold-rolled channel section to as big as a thirty-six inch wide roof deck section.

冷弯型钢产品是在环境温度下由钢板、带材或扁钢通过滚压成型机、压闸机或弯闸机操作成型的。它们可以大批量、高速度、高质量地生产。一台典型的自动卷板机可以以每分钟75-400英尺的速度运行，产品可以小到3 / 4英寸宽的冷轧槽段，大到36英寸宽的屋顶甲板段。