Recommendations for the installation of Fischer wedge steel anchors

Wedge expansion steel anchors, or anchor bolts, are one of the most popular types of anchoring in America. The wedge anchors are made of stainless, galvanised or hot-dip galvanised steel and are designed for installation in concrete, reinforced concrete structures and dense natural stone.

Fischer anchor bolts

For a correct assembly we recommend a certain sequence of operations:

1. Drill a hole the desired diameter to a depth of 5 mm plus the length of the anchor. Additional distance is needed to install the anchor to the right depth if the hole is not cleaned and during the process of hammering the anchor the remains of drilling dust are compacted. The anchor can be hammered to the desired depth with a hammer or with a special FABS hammering device by means of a drill in impact mode.
2. Tighten the nut with a wrench to the recommended tightening torque indicated on the packaging or in the catalog.

Not all wedge anchor types are suitable for installation in cracked reinforced concrete. The use of anchor brands for installation in cracked concrete is strictly regulated by specific ETA construction approvals in Europe and by CU in America, which only professional fastener manufacturers possess. Anchors designed by fischer for installation in tensile concrete cracked concrete have black colored elements in their design e.g. FH, FNA, FPX, FAZ .

When anchors are installed, the largest expansion forces occur in the area of the clip the main spacing element of the anchor , resulting in large edge and axial spacings distance between adjacent anchors . In order to avoid damage to the wall material spalling, cracking etc , the fischer FAZ II and the fischer FPX-I anchor can be installed in cracks in the reinforced concrete.d. the above distances must be strictly adhered to. These values can be found in the manufacturer’s catalogs, as well as on the website: /data/away/71a988f62fcb6491ac4991691fde9763/. Equally important is to consider the minimum recommended base thickness required for the installation of the selected anchor. Otherwise, if the anchorage depth is comparable to the wall thickness, there is a risk of destroying the wall material in the clip spreading area.

Detailed installation instructions can be found in the installation video of the fischer FAZ II and fischer FPX-I anchors:

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