Types of assembly
Heavy-duty anchor Guidebook – Part 6
A distinction is usually made between pre-positioned installation and push through installation. Let´s take a closer look at the two types of installation below:
Pre-positioned installationThe process of pre-positioned installation consists of several steps:
First a hole is drilled according to the product data and cleaned using a cleaning brush and blow-out pump. (1-3) In the next step, the anchor is inserted into the fastening base. If multi-part anchors are inserted, please note that the steel sleeve is completely sunk in the concrete. This is the only way to use the full cross-bearing capacity. Heavy-duty anchors such as our BA Plus through bolts have a depth-of-set marking, which also facilitates pre-positioned installation: the anchor is hammered in up to the coloured marking and a correct setting depth is guaranteed without measuring effort. (4) Then the washer and nut of the anchor must be temporarily removed. In the case of multi-part metal anchors, pre-stressing is basically released this way. Our LIEBIG® SUPERPLUS BLS-P pre-installation anchor is therefore equipped with an additional safeguard. It prevents single components of the anchor from falling off. (5) Then the add-on part to be attached is mounted. (6) Finally, the washer and nut are replaced and tightened to the specified torque. (7)
In-place installationThis assembly process also consists of several steps, some of which are similar to pre-positioned installation:
First, the borehole must be drilled. In the case of push through installation, the add-on part is an excellent plate drill jig. It is positioned first to create the drill holes accurately. (1) Now a hole is drilled according to the product data and cleaned using a cleaning brush and blow-out pump. (2-4) The anchor is then installed in the surface through the add-on part using a hammer. This is why we call this push through installation. (5) Finally, the nut must be tightened to the specified assembly torque. (6)
In the case of multi-part anchors such as our LIEBIG® SUPERPLUS BLS, both the threaded rod and the steel sleeve run through the add-on part, whereby very high lateral load-carrying capacities are achieved.