International Catalogue

Installation
Generally, the following aspects have to be considered during installation:
The edge distance and axial spacing, as well as the component thickness and
width, must be complied with properly if the fixing is to hold the required load.
Otherwise it may lead to spalling of the construction material or cracks. For fixing
without permission especially for plastic anchors, usually a necessary edge distance 2 x h ef
(h ef = anchoring depth) and a necessary axial distance of 4 x h ef is normal. If the expansion
direction of the fixing runs parallel to the component, the edge distance can be reduced
to 1 x h ef .
The drill hole depth must - other than a few exceptions like injection technology - be
larger than the anchoring depth: that is because function safety is ensured only if the screw
has enough room to project beyond the tip of a plastic fixing.
Drill hole cleaning after drilling, by blowing out, brushing or suction, is indispensable.
A hole that is not cleaned reduces the holding forces. The drilling dust has a negative effect
on the load-bearing capacity of the fixing in the drill hole.
▸ Expert tip
▪ Specifications for component geometry, edge and axis distances must be adhered
to. Non-adherence can lead to reduction in the load-bearing capacity or damage to
components.
▪ Drill hole cleaning is essential. The specifications in the approvals and the
manufacturer’s specifications must be adhered to.
Basic Knowledge of Fastening Technology
Differentiate between three different methods:
1. Push through installation: Especially as installation relief for series installations or
for accessories with two or more fixing points:
▪ The holes in the accessory can be used as a drilling template if their hole diameters
are at least as large as the drill diameter in the construction material.
▪ In addition to simplifying installation, a good fit of the fixing holes is achieved.
▪ The fixing is inserted into the drill hole through the item to be mounted and then
expanded. E.g.: FAZ II, FBN II, FH II
2. Pre-positioned installation: The anchor is installed before the installation of the
accessory. In this installation, the anchor diameter and the drill hole diameter are not
identical.
The installation sequence:
▪ Transfer the hole pattern of the accessory to the anchor base,
▪ Clean drills, drill holes, fix anchors and then screw on the accessory.
E.g.: plastic fixings: S, SX, UX; Metal: FZA, EA II
3. Stand-off installation: Makes it possible to attach accessories at a particular
distance from the anchoring base in a compression-proof manner and guaranteeing
tensile strength. For that, metal anchors with metric internal thread are used which
can assimilate screws or threaded bolts with lock nuts or injection technology with
threaded bolts.
Useful length and anchoring depth: Must be taken into consideration apart from the
installation type of the respective fixing.
Installation types
fischer anchorbolt FAZ II fischer universal frame
fixing FUR
fischer zykon anchor FZA fischer aircrete
anchor GB
fischer bolt FBN II
fischer Hhighbond
anchor FHB II
455