Anchor holder DW 15 – DW 26.5
Thickness of component/slab in cm
35
40
45
50
55
60
65
Maximum length of tie rod L
Amax
(for a concrete thickness of at least
20 mm and use of a planing cap)
37
44
51
58
66
74
82
Table 27.2 Maximum length of the tie rod
The maximum length of the tie
rods DW when using the anchor
holder DW depends on the floor
slab thickness d
Bt
(Fig. 27.1) and
is calculated using the formula
on the right. For the maximum
length of the tie rods DW in the
different slab thicknesses refer to
Table 27.2. For other structural
specifications the installation
depth of the tie rod can be var-
ied and set using the integrated
adjusting screw.
Depending on the slab thickness,
the maximum installation depth
of the anchors and any addi-
tional rebaring measures required
are to be clarified with the struc-
tural engineer taking corrosion
protection requirements into
consideration.
Note
Æ
The tie rod lengths specified
in Table 27.2 apply when the
planing cap is installed.
Æ
Longer tie rods are required
if planing caps are not installed.
Anchoring – Installing anchor holders DW 15 – DW 26.5
Fig. 27.1
d
Bt
a
L
Amax
Upper rebar layer
Lower rebar layer
Anchor holder DW 15 – DW 26.5
Tie rod DW
Fixed anchor DW
Planing cap
Maximum length of the tie rod when using anchor holders DW 15 – DW 26.5:
L
Amax
= 2 x (d
Bt
- a - 5.5)
L
Amax
= maximum length of the tie rod
d
Bt
= thickness of component/slab
a = distance between lower edge of component to lower edge of slab
5
The minimum length of the tie rod is 50 cm when anchoring the STB 450 (see page STB-25). The
part/slab must thus have a thickness of at least 45 cm.
STB-27
Technical Instruction Manual / Status November 2019
STB
Support frame
