SIGMA Fahrradparker, Bicycle Stand, Support pour bicyclette - Orion ...

Tender specifications „RATIO Twin“ (double-sided variation 4.5)
Item Description Quantity Price per unit Total price
1 Base element .......................................................................................................................................................... 1
Number of addition elements (field grid, 1250 mm) ......................................................................................................
System shelter type "RATIO Twin", roof depth: 4.5 m, front clearance height: 2.2 m (4.5- 2.2) with aluminium clad flat and
inclined roof in colour tone per RAL. The structure is erected as a building kit system by configuring a base element together with
a number of addition elements to achieve a required length (L) for the system. Both the base element as well as addition elements
are to be designed for a field grid of 1250 mm.
The roofing material for both flat and inclined areas is implemented with weather resistant aluminium edge section whose geometry
is to be adapted to the roof shape such that no butt-joint is created where the flat and inclined areas of the roof meet.
Butt-joints in the roof's longitudinal direction occur in field grid increments or a multiple of same and must – adapted to the roof's
geometry – be sealed watertight with sections and plastic seals. The roofing material is attached to its support structure - unrestricted
- via special clamping sections which compensate for the various aluminium panel working movements resulting from
thermal influences (use of different materials with differing expansion coefficients) without any incidence of damage. Contact corrosion
caused by the direct contact of differing materials, steel and aluminium, is to be eliminated by coating the respective steel
parts with a corrosion-preventing polyester layer or by using plastic buffers.
The ribs for this double-sided overhanging roof structure are pre-fabricated individually from hollow steel sections, cut and welded to form
the necessary angles (subsequently referred to as "V-shaped, horizontally folded staffs"), then collectively arranged on-site at a grid spacing
of 1250 mm. The flat roof area's rib end pointed toward the inclined roof area is mitre cut to an angle of 45° for weld-connection to the
support segment of the inclined roof area, mitre cut at both ends at a 45° angle, and in turn weld-connected to the centre piece of the
identically formed opposite wing of this symmetrical roof overhang structure. The load presented by the roofing material and the external
loads per DIN 1055 are borne by the "V-shaped, horizontally folded staffs". The individual elements are welded together to make the staff
rigid (as described above), thus creating a homogeneous roof joist. These roof joists are supported by a beam running the length of the
roof. The supporting beam is located beneath the centre of the double-winged overhang. The connection between roof joists and the supporting
beam is accomplished with rigid connections to absorb exerted bend and torsion moments as well as vertical and horizontal forces.
The support beam, implemented with a closed hollow section, is to be dimensioned appropriately for the various types of stress exerted
on it. The connection of this hollow section to its vertical supports is to be designed as an appropriately dimensioned rigid connection
oriented in the direction of torsion forces. The above-described support beam, the main vertical supports on which it rests, and also the
rain gutters are to be designed to meet static requirements. The drainage of roof rainwater is accomplished by way of a specially formed
steel section, the so-called "rain gutter", whose geometry is capable of handling the entire volume of rainwater caught by the flat and inclined
areas of the roof. The rain gutter is positioned in the longitudinal trough formed by the double-winged roof overhang. The rain gutter is
supported by, and fastened to, the longitudinal support beam; these two system components are to have a non-positive connection
produced by screws. The screw locations are to be properly watertight sealed with sealing compound. The rain gutter is clamped under
adjacent edges of the aluminium roofing material to guarantee that the entire volume of rainwater is caught and also to further stabilise the
position of the rain gutter.
The rain gutter section is to be watertight closed at both ends with welded-on end caps. Rainwater collected in the rain gutter is
passed on to the shelter's main vertical supports by way of water drain stubs integrated into the rain gutter. Water exits the structure
to the outside by way of above-pavement outlet stubs integrated into the main supports. It is absolutely necessary that all
roof rainwater is collected and drained off in the above-described manner. Structural dimensioning is executed to meet static
requirements and is to be designed for a rated snow load of 0.75 kN/m 2 . The main supports are designed to be shackled into
pit foundations which, after assembly is complete, are pour-filled with concrete. The pit foundations are to be frost-free. The
length (L) of the system is the determining factor whether or not the main supports at each end of the shelter must be complemented
by additional intermediate supports along the longitudinal beam described above. Intermediate vertical supports are necessary
if L > 3 field grid units. Intermediate vertical supports are to be positioned to achieve overall symmetry of vertical supports.
Each forward end of the roof's overhangs are capped with a section that not only improves the shelter's visible appearance but
also functions as a wiring channel to permit concealed wiring for desired electric fixtures. These capping sections also provide
support for the extreme outer edges of the aluminium roofing material. Static requirements, in the sense of load distribution in the
roof area, are not placed on these capping sections.
All steel structural elements are to be coated in a duplex process.
First step: hot galvanising in dip bath per DIN EN ISO 1461.
Second step: powder coated in customer's choice of RAL colour tone, coating thickness 80 ... 120 my.
Colour coating build-up: • Parkerizing layer
• Special water-based primer
• Powder coating with UV-stabilised polyester powder, baked on at about 240° C.
The award of contract is contingent upon provision of a functional sample at the premises of the tender inviting office as well as
the naming of a location where a structure equivalent (in the sense of >identical