4.5 Floors, walls, ceilings, windows 地面，墙壁，天花板，窗户

4.5.1 Floors, walls, ceilings and windows in production areas should be designed or constructed for ease of cleaning and, if necessary, sanitization and be kept clean and in good repair.

生产区域的地面，墙壁，天花板，窗户应设计为易清洗的，必要时可以消毒的，以保持清洁和良好状态

4.5.2 Windows should be of non-opening design where ventilation is adequate. If windows are opened to the outside environment, they should be properly screened.

当其中空气流通充分时，窗应该设计为不开启的。如果窗是直接开向室外的，应有纱窗。

4.5.3 New construction of production areas should incorporate considerations for proper cleaning and maintenance. Design of new construction should include smooth surfaces if appropriate and these surfaces should allow for resistance to corrosive cleaning and sanitizing agents.

新的生产区域的设计应考虑清洗和维修两点，包括光滑的表面并能抵抗腐蚀性清洗和消毒剂的作用

4.6 Washing and toilet facilities 盥洗设施

Adequate, clean, washing and toilet facilities should be provided for personnel. The washing and toilet facilities should be differentiated from, but accessible to, production areas. Adequate facilities for showering and changing clothes should be provided when appropriate.

盥洗设施要提供给员工，应与生产区域分开，但应直接通向生产区。适当时要提供淋浴和更衣设施。

4.7 Lighting 灯光

4.7.1 Adequate lighting, that is sufficient for operations, should be installed in all areas.

所有区域都应安装充足的光线适合作业，

4.7.2 Lighting should be installed in a manner to ensure containment of any debris from potential breakage.Alternatively, measures should be taken to protect the product.

灯的安装方式应采用万一发生破损时不会对产品污染的方式。否则，要采取措施保护产品。

4.8 Ventilation 通风设备

Ventilation should be sufficient for the intended production operations. Alternatively, specific measures should be taken to protect the product.

在作业时通风要充足，如果不能，要采取措施保护产品。

4.9 Pipework, drains and ducts 管道，排水沟，排泄管

4.9.1 Pipework, drains and ducts should be installed in such a manner so that drip or condensation does not contaminate materials, products, surfaces and equipment.安装时要考虑到水滴或冷凝水不能污染原料，产品，容器、设备表面。

4.9.2 Drains should be kept clean and should not allow back flow.排水沟应保持清洁而且不能回流

4.9.3 Design considerations should be given to the following:设计所要考虑的

a)exposed overhead roof beams, pipes and ducts should be avoided; 当屋顶横梁外露时，管道和排泄管应避免

b)exposed pipes should not touch walls, but be suspended from or supported by brackets, sufficiently separated to allow

thorough cleaning;外露的管道不能接触墙，但可以由托架拖着或者吊着，要充分隔离以便彻底清洗

c) alternatively, specific measures should be taken to protect the product.否则，要采取措施保护产品。