TECHNICAL SPECIFICATION
Variflex 100 S-M - Manual
Movable partition wall of individually operable elements with a frame construction of torsionally stiff
aluminium and steel tubular sections (“profiles”). Clad on both faces with 1.0 mm thick electrolytically
galvanised steel sheet, all edges folded for enhanced stiffness, lined with full-face bonded 9.5 mm or
12.5 mm thick plasterboard, hung in vibration-free suspension for acoustic isolation, rubber-mounted
fixing. The edges must be rounded for safety. Aluminium capping profiles are not permitted.
Structure-borne sound transmission to be reduced to low level by acoustically isolated vertical profiles.
Integrated hollow-chamber lip seals to be provided in aluminium coloured finish. Element thickness
100 mm. The entire system must function as a solid wall and even when closed should reveal no
screws, fixings or other similar metal parts.
Sound attenuation achieved with the operable partition to satisfy EN 20 140-3: 1995.
Measurement to be performed on a wall test facility to EN ISO 140-1: 1998. Calculation of the weighted
sound attenuation value and of the spectrum adaptation terms/values to be compliant with EN ISO
717-1: 1997.
The movable partition wall must be covered by a drop ball/ball rebound test, or equivalents in each
case, with confirmatory certificates to be included with the quotation.
The following quality features are required in order to ensure long and disruption-free service:
Frame construction
To be of torsionally stiff aluminium and steel tubular profiles.
Extensible strip seals
The elements must feature spring-loaded operable double sealing strips top and bottom that can be
pressed via a spindle mechanism (trapezoidal thread) against the surfaces of the floor and of the
ceiling track, automatically compensating for unevenness in the floor.
In order to ensure optimum vertical sealing between the extended sealing strips, and sealing strip end
elements must be in the form of polyurethane mouldings.
The sealing strips must be of (black) aluminium and capable of meeting the highest requirements in
terms of acoustic attenuation and stability. Extension travel of the sealing strips top and bottom to be
up to 30mm in both cases. Contact pressure up to 1500 N.
Element interconnection
The elements must be interconnected by means of a positively and frictionally retained interlocking
concave/convex sheathed aluminium profiles with an integrated magnetic strip having a linear
attraction of min. 40 N/m. Metal components to be invisible when partition both open and closed.
Additional vertical outboard seals at element abutment joint.
Telescopic element
The final closing element of the partition in each case shall be designed as a flush-closing telescopic
compensation element without protruding or receding edges. Its function must be ensured over its full
height by means of a triple-action spindle/lever drive mechanism. Construction elements such as
folding flaps are not permissible. Material identical with that of the main partition.
A useful extension stroke of up to 120 mm must be available in order to ensure flush-closing of the
partition, and the contact pressure must be adjustable between 0 and 1000 N.
Pass door element
If pass door or double pass door elements are to be provided as part of the configuration, these are to
be equipped with a 100mm thick surrounding portal frame of sturdy steel sections. The lateral posts
must be provided with compression beams to ensure positive engagement with the floor. A further
connection must be provided in the form of locking projections engaging in floor sockets. The door leaf
must be provided with a steel frame and an automatically operable sealing strip.
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The sealing components that engage flexibly with the ceiling (sealing strip) and floor (sealing feet in the
door posts) must be operable from the front face. Additional means for ensuring the stable location of
the door are not permissible.
In the case of double pass doors, one leaf should be equipped to function as the active leaf and one as
the inactive leaf with emergency unlocking function.
Element suspension
Each element must be hung at one or two points from a ceiling-mounted track of aluminium and
operate on maintenance-free multi-directional carriers featuring track rollers mounted in ball bearings.
The carriers must be secured to the element by means of shock-absorbing/impact-damping rod
elements. No ball races or sliding friction pads/discs.
Element adjustability
In order to compensate for any small degree of ceiling sag, each element must be adjustable without
the need to open up the ceiling cavity or the element itself. In the event of superficial damage, it must
be possible to replace the panels without removing or dismantling the elements or other components of
the construction.
Track rail system
The track must be absolutely maintenance-free.
Intersections, T-junctions and corner elements must be closed-die forgings and equipped with support
roller assemblies. In order to ensure the easy operability of the elements, including at track junctions
and in the stacking/parking area, rolling friction must be ensured at all points along the track.
Track installation
Track systems are to be secured by means of adjustable steel suspension assemblies to load-bearing
structural components provided by others (e.g. steel substructures, concrete beams, etc.).
The suspension assemblies are to be supplied by the bidder. Steel suspension assembly adjustability
must be ensured to compensate for any subsequent slight ceiling sag. Rigid, non-adjustable hanger
constructions are not permitted.
The materials employed must be provided with a corrosion-inhibiting coating/treatment.
The partition systems offered shall exclusively feature track constructions and suspension assemblies
complying with the definition of “simple steel structures” as per DIN 4100 (see also VOB [Construction
Contract Procedures], Part C, DIN 18335).
According to State Building Regulations, the bidder shall possess a certificate of welding competence
(e.g. to DIN 4100 – Certificate of competence for the welding of simple steel structures subjected to
predominantly static loading). A copy of this certificate must be attached to the quotation.
Sound baffle
A double-skin sound baffle (attenuation up to Rw = 48 dB) or a quad-skin sound baffle (attenuation Rw
= 49 dB to Rw = 56 dB) or a six-skin sound baffle (Rw = 57 dB) must be provided by the bidder to
correspond to the specified sound reduction value of the partition elements. A clean, tight seal
against the head track and adjacent building parts must be ensured. The cavities between the
plasterboard skins must be filled with non-settling mineral wool. The ceiling joints must be sealed with
silicone mastic filler (permanently elastic type). The above substructures/assemblies, fills and baffle
systems must be included in the unit prices.
General quality management / ISO certificate
The manufacturer of the partition system must have introduced and must operate a registered
quality management system to (DIN) (EN) ISO 9001 and be able to confirm this with a valid
certificate.
Certificate registration no.: ............................. valid until .................
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Item 1
...... Nos. Operable partition system as described above
Clear width
Clear height
subdivided into
Height of suspension
Surface finish:
.................. mm
.................. mm
.................. Nos. individual elements
.................. mm
......................................
.......................................
Required sound reduction:
Weight of partition/m2
Element thickness
Frame construction:
Track rail system:
Make
Type
Rw........ dB with test certificate
........ kg
........ mm
Steel/Alu
Alu
................................................
................................................
Partition manufactured
entirely in-house?
 Yes
Number of years operable partitions
supplied to the market?
...... Years
Unit price includes delivery and
installation ready for operation.
U.P.
 No
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