When authors sign the copyright transfer agreement (CAT), they are transferring the necessary rights for publication to the publisher. The form is available online or in hard copy.
In the case of article (peer reviewed submissions), this is particularly important with electronic publication as either an early view (EV) or accepted article (AA). It allows the research to be published earloer and independently of the printed edition.
This early publication is currently available in: Bautechnik and geotechnik (both AA and EV); Beton- und Stahlbetonbau, Steel Construction, and Stahlbau (EV only). When a reviewer accepts an essay, it will not be published unless a signed copy of the form has been supplied. The information "sharing principles" also apply.
Reports, i.e. submissions which, instead of stating research findings, document the incorporation of research results into project reports etc., are generally not published as AAs or in EV. The embargoes on subsequent publication of reports are not as long.