AIRSLIDE
30
532225 - Rev.A
Tr
ansla
tion of the original instruc
tions
ENGLISH
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Design actions
N= 1.63 kN Reaction to support
Yg= 1.3 Design partial factor
Nsd= 2.12 kN Design reaction
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Configuration1 _Base data
d= 130 mm Vertical distance between fasteners
e= 43.6 mm Eccentricity of load with respect to fastener axes
Nsd= 2.12 kN Design reaction
Mt sd=0.092 kNm Couple generated by N x e .
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Stresses in anchors
Vsd,v= 1.06 kN Vertical reaction on individual anchor
Vsd,o= 0.71 kN Horizontal reaction on individual anchor
Vsd = 1.28 kN Total reaction at anchor
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Configuration2 _Base data
d= 130 mm Vertical distance between fasteners
e= 83.6 mm Eccentricity of load with respect to fastener axes
Nsd= 2.12 kN Design reaction
Mt sd=0.177 kNm Couple generated by N x e .
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Stresses in anchors
Vsd,v= 1.06 kN Vertical reaction on individual anchor
Vsd,o= 1.36 kN Horizontal reaction on individual anchor
Vsd = 1.73 kN Total reaction at anchor
Confi guration 2 is worse in terms of the stresses in the dowels;
therefore, if the minimum distances from the edge allow it (see
minimum distances from edges Cmin in following sections), it is
advisable to use confi guration 1.
6.3 PERMISSIBLE SUBSTRATES
The following masonry substrates are permissible for fastening the
beam to:
• CONCRETE
•
SOLID BRICK (VOIDS < 15%)
•
HOLLOW BRICK (15% < VOIDS < 45%
For other existing substrate types (natural stone, hollow brick with a
greater proportion of voids, gypsum board etc.), it will be necessary
to prepare a counterframe made from:
• STEEL
FRAMEWORK
• ALUMINIUM
FRAMEWORK
• WOODEN
FRAMEWORK
6.4 SUBSTRATE CONDITION
Before installation, you must carefully check the condition of the exist-
ing substrate which the beam is to be attached to; this substrate must
be in good condition without any evident cracking or patching up;
more specifically, by substrate type, the following requirements apply:
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CONCRETE
The attachment surface must be homogeneous and compact, without
voids or flaking due to corrosion caused by carbonation.
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SOLID BRICK (VOIDS < 15%)
The attachment surface must be homogeneous, without any cracking
brickwork or evidence of cementitious or gypsum-based plaster or
rendering having been applied; the mortar joints must not come away
simply by running a hand tool over them, and the wall must have been
faced to a good standard.
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HOLLOW CONCRETE BLOCKS
No cracking or other damage should be evident, and they should not
have been subject to previous installations; the blocks must have been
laid to a good standard using thin-joint techniques or standard mortar
joints, following the manufacturer’s specifications.
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STEEL FRAMEWORK
Steel counterframes must show no signs of corrosion and must be
treated with red oxide primer.
Such counterframes must be specified by the installer in accordance
with the loads given, and must in turn be anchored using appropriate
hardware to a supporting structure which is able to keep them stable.
A minimum thickness of 6mm is recommended for such structures.
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ALUMINIUM FRAMEWORK
The rods of the counterframe must show no sign of deformation, and
they must not have been subject to cold bending which could cause
micro-cracking or localised weaknesses.
Such counterframes must be specified by the installer in accordance
with the loads given, and must in turn be anchored using appropriate
hardware to a supporting structure which is able to keep them stable.
A minimum thickness of 6mm is recommended for such structures.
When using aluminium counterframes, a layer of teflon must be placed
between the framework and the metal beam to prevent galvanic
corrosion.
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WOODEN FRAMEWORK
The lumber used must show no sign of rot or damp, and must not have
been previously used, cut or damaged.
Such counterframes must be specified by the installer in accordance
with the loads given, and must in turn be anchored using appropriate
hardware to a supporting structure which is able to keep them stable.
A minimum thickness of 30mm is recommended for such structures.
It is always preferable to have the counterframes specifically made
to measure, providing for through fasteners (bolts for metal frames,
self-tapping screws or similar or else bolts for timber frames).