Gastronorm

 ( Cookware And Bakeware ) 

Gastronorm ( GN), sometimes spelled Gastro-Norm, is a European standard for kitchenware Sheet pan and container sizes that is commonly seen worldwide in the catering and professional food industry, as well as in certain parts of the high-end consumer market. Gastronorm is generally used worldwide except in most of the United States and Canada, which have their own domestic systems. The Gastronorm standard was first introduced in Switzerland in 1964 and became an official European standard in 1993 with the EN 631 standard.

The basic format is called "GN 1/1" and measures 530×325 mm, with other Gastronorm sizes being multiples and submultiples of this basic module size. Gastronorm containers allow for flexible, place efficient, and compatible storage, transport, processing, and serving and can be adapted for shelving, transport on trolleys and conveyor belts, secure temporary placement in compatible , working tables, refrigerators, freezers, ovens, hot water baths, and compatible dishwashers, or display. Other products that have adopted the Gastronorm format include cutting boards and non-stick mats. Many professional food products are even packaged for optimal compatibility with Gastronorm containers, such as pizza base sizes, pre-baked breads, or frozen vegetables.

Materials most commonly used for the container are either stainless steel or plastic (transparent or non-transparent). Stackable Sheet pan and stainless steel containers are commonly used for cooking in an oven, while polycarbonate and polypropylene variants are suited for storage of cold foods. Porcelain or melamine containers are used for display.

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History Gastronorm originated in Switzerland during the 1960s when various associations gathered and agreed on standard dimensions for movable kitchen inserts and containers such as frying pan, sheet pan, wire racks as well as other kitchen utensils and equipment. A Guide to Gastro-Norm Pan Sizes - Learning Center - FWE The goals of the standard was to maximize use of the capacity in ovens and fridges by introducing kitchenware in compatible square sizes that left no corners unused. The standard was first formalized 17 November 1964 when different Swiss hotel associations gathered and agreed on the basic metric size of 530 × 325 mm. Despite initial skepticism by chefs claiming that "gastronomy cannot be standardized", the Gastronorm (GN) format has since gained worldwide recognition and is used by a large majority of equipment manufacturers and users of professional kitchens worldwide. On 15 December 1993, the format was adopted by the European Committee for Standardization in the standard EN 631-1: 1993 "Materials and articles in contact with foodstuffs - Catering containers - Dimensions of containers". Today almost all professional European kitchen equipment is built according to the gastronorm standard, enabling flexibility of kitchen operations across Europe when it comes to planning, transfer, delivery, storage and production.

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Sizes The Gastronorm system is based on fractional sizing, making different-sized GN containers interchangeable. For example, a GN 1/1 tray can be substituted with two GN 1/2 containers.

+ Common Gastronorm Dimensions
GN2/1	650 × 530
GN1/1	530 × 325
GN2/3	355 × 325
GN2/4	530 × 162
GN1/2	325 × 265
GN1/3	325 × 176
GN1/4	265 × 162
GN1/6	176 × 162
GN1/9	176 × 108

Containers usually come in standard depths of 20 mm, 40 mm, 65 mm, 100 mm, 150 mm, 200 mm.

Drain lids and lids with cut-outs such that a serving utensil can be placed into the container are common accessories. They are made in these sizes especially for the catering industry. There are also covers in the same measurements: GN 1/1, GN 1/2, GN 1/3, GN 2/1, GN 1/4, GN 1/6, GN 1/9, GN 2/3.

Other less common sizes are:

+ Less Common Gastronorm Dimensions
GN2/8	324 x 132
GN1/12	162 x 88
GN2/24	132 x 108
GN1/18	108 x 88

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Materials Containers can be made of stainless steel, Vitreous enamel, metal covered with a non-stick surface, synthetic or composite materials, earthenware or porcelain. Containers can either have a closed or perforated bottom to facilitate draining or certain specialized types of cooking. Recently, fully compostable Gastronorm trays have also been introduced. « Castelsarrasin. Cellulopack : une barquette alimentaire 100% biodégradable » La Dépêche.fr, 3 juin 2016

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Examples of use

• Electrical kitchen equipment: Gastronorm compatible kitchen equipment such as that are designed solely to hold Gastronorm containers are available. Large mobile racks or are also available for storage and portability.
• : Both commercial and professional combi steamers typically utilize food racks with dimensions corresponding to Gastronorm specifications, most commonly either GN1/1 or GN2/3.
• Plates: A few companies (such as Olympia, Emile Henry, Genware) manufacture ranges of white porcelain dishes in Gastronorm sizes as serveware including decorative lids.
• Tray: Gastronorm-sized stainless steel or plastic serving plates are available.
• : Pans with holes so that ingredients can be drained. Can also be used for steaming inside an oven, or to soak the ingredients in an ice bath.
• Commercial Dishwashers & Glasswashers | CS Catering Equipment
• : Gastronorm compatible cutting board are available, for example in the sizes 1/1 and 1/2. For instance as an integral tray that slots in beneath chopping boards, so that food chops can be pushed easily into the tray for either later use or disposal.
• Chafing dish: Food stands are available which accepts Gastronorm sized pans and has an alcohol burner to keep food warm (above ), for example at a buffet.

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