International Catalogue

With method C, a characteristic resistance is given. This characteristic resistance is valid for
all load directions and predetermined edge distances and spacings which cannot be reduced.
Method C corresponds to the older method for verifying the steel expansion anchors in noncracked
concrete.
For daily use and for evidence of fixings, fischer has developed a simple, fast and effective
design software. The software makes it possible for designers and users to calculate fixing
connections and fixing multiple dimensioning using a convenient input. An easy-to-read status
line continuously shows the used capacity of the fixing, which significantly simplifies the
selection of the technically and economically correct fastening system.
The 12 different options of the guideline for the European Technical Approvals for “Metal fixing for anchoring in concrete”,
ETAG 001
Approved option 1 2 3 4 5 6 7 8 9 10 11 12
Concrete
Concrete
qualities
Approved for cracked and non-cracked concrete • • • • • •
approved only for the pressure area • • • • • •
Better concrete qualities result in load increases
No load increase due to better concrete quality
C 20/25
to
C 50/60
only
C 20/25
C 20/25
to
C 50/60
only
C 20/25
C 20/25
to
C 50/60
only
C 20/25
C 20/25
to
C 50/60
only
C 20/25
C 20/25
to
C 50/60
only
C 20/25
C 20/25
to
C 50/60
only
C 20/25
Basic Knowledge of Fastening Technology
Bearing
capacity
Optimal utilization due to
different loads for tensile and shear loads • • • •
Only one load for all
loading directions • • • • • • • •
Reduction of spacings possible • • • •
Axial
spacing
Reduction of the large base spacings 1) possible (with
simultaneous reduction in load) • • • •
Fixed, large base spacing • • • •
Reduction of the edge distances possible (with simultaneous
reduction in load) • • • •
Edge
distance
Reduction of the large base spacings 2) possible (with
simultaneous reduction in load) • • • •
fixed, relatively large base- spacing • • • •
Dimensioning methods
A 1 ), B 2 ),
C 2 )
A 1 ), B 2 ),
C 2 )
B 2 ), C 2 ) B 2 ), C 2 ) C 2 ) C 2 )
A 1 ), B 2 ),
C 2 )
A 1 ), B 2 ),
C 2 )
B 2 ), C 2 ) B 2 ), C 2 ) C 2 ) C 2 )
1) Base spacing = 3 x anchoring base, base edge distance = 1.5 x anchoring depth
2) Base spacing = 4 x anchoring base, base edge distance = 2 x anchoring depth
467