The CONSTRUCTION EQUIPMENT REGISTER is a superordinate catalogue published by the Hauptverband der Deutschen Bauindustrie (HDB) and the Fachverband der Bauindustrie der Wirtschaftskammer Österreich. No specific brands or type designations are listed in the construction equipment list. The individual items contain average technical and economic values, supplemented by explanations of the design and equipment as well as the use in operation.

The CONSTRUCTION EQUIPMENT REGISTER (BGL) has been the industry standard for allocating the costs of construction machinery for decades. As early as the 1950s, German and Austrian construction associations developed equipment lists as the basis for internal and inter-company invoicing. Since BGL 2020, there has been a joint version of the Hauptverband der Bauindustrie e.V. and the Construction Office of the Austrian Federal Economic Chamber (WKO). The current version was extensively revised in 2025.

The BGL 2025 is divided into 21 main equipment groups. Further subdivisions are device groups, device subgroups, the device type as well as additional equipment and additional devices. With a total of ten digits, all construction equipment, additional equipment and ancillary equipment in the CONSTRUCTION EQUIPMENT LIST, including the associated technical data, average new values, depreciation periods (years of use) and holding costs, are clearly described.