Connection and fastening systems

Information on screw-in and knock-in systems

With the friction closing method, the anchors/ties maintain their load through friction in the mounting substrate. Usually, push-through mounting is used here, in which the anchor/tie is pushed through the fastening hole of the mounting component and then both are fixed in the drill hole.

With fitting, the geometry of the anchor/tie adapts itself to the mounting substrate (drill hole). Here, pre-attachment mounting is used, in which the anchor/tie is first placed in the drill hole and the mounting part fastened separately afterwards.

The use of a mortar which fixes the anchor/tie in the mounting base is termed the material closing method.

Selection criteria for ties and anchors
When selecting the anchor/tie, factors such as the substrate and its characteristics, the mounting type and the load of the anchor have a role to play. Therefore, the following basic questions should be asked when selecting the anchor/tie:

What is the mounting substrate?

Are there edge or axis spacings to be taken into account?

How thick is the mounting substrate? Can I maintain the required drill hole depths?

Which mounting type is the right one for fastening the component?

Is the anchor/tie required for cracked or uncracked concrete?

Is it an application for function maintenance? Do the anchors/ties have the appropriate approval?

Are there any corrosion protection requirements of the anchor/tie?

Requirements of the Model Building Regulations
To provide the core statement for supporting constructions, it is possible to quote the Model Building Regulations of November 2002. Paragraph 3 states, amongst other things, that "Systems are to be arranged, erected, modified and maintained in such a way that public safety and order, and in particular life, health and natural requirements for life, are not endangered". Therefore, for applications, for example, in the field of cable support systems, only approved ties and anchors should be used.