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. 799tk 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 ................. 799tk 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 799tk