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GL8 stands for "Long-Span Mezzanine Floor” with 8 folds (the beams have 8 roll forming folds); the span, i.e. the distance between two adjacent columns, can reach a maximum of 8 metres. The GL8 long-span mezzanine floor has important innovative features and has been patented. This is substantially made up of columns, capitals and beams . The mezzanine floor horizontal structure grid consists of main and secondary beams. The beams, made of certified quality steel, can be of different thicknesses and be installed single or double according to the capacity required. The beams are provided throughout their length with holes for the passage of tubes, cables and technical elements, thus facilitating installation of the ancillary systems. The capitals connect the beam grid to the supporting columns. All the elements that make up the GL8 long-span mezzanine floor offer high load-bearing capacities in compliance with the safety regulations. The warp of the main and secondary beams supports the passageway of the GL8 mezzanine floor, which Armes can produce in different ways according to requirements: galvanised sheet metal floor strips , wood, for use alone or combined with corrugated sheet iron, or lightweight concrete base to obtain a masonry floor. See DECKING for further details. The GL8 long-span mezzanine floor is completed by a wide range of accessories including access ladders , provided with non-slip galvanised steps, protective railings and gates. The fact that the product can be configured as desired and its flexibility, combined with the user’s creativity, allow particularly elegant structures to be obtained, for example when making overhead display surfaces. Armes can produce mezzanine floors for installation in seismic areas or for outdoor applications.

TECHNICAL SHEET AND ACCESSORIES

accessories	one or two-flight ladders with or without landings, railing complete with handrail, knee rail and kick plate, one or two-wing gates, sliding, pivoting
available finishing	Powder painting: structural elements. Sendzimir galvanising: sheet metal floor strips
shelf type	Blue (RAL 5010), yellow (RAL 1007), green (RAL 5021), dark grey (RAL 7016), light grey (RAL 7035)
column height	from 2.000 mm to 4.000 mm
column dimensions	from 120 mm x 120 mm to 175 mm x 175 mm
column thickness	from 2 mm to 4 mm
column load capacity	up to 248 kN (24.800 kg)
sigma beam length	from 400 mm to 6.000 mm
sigma beam load capacity	up to 73 kN (7.300 kg) u.d.l
capitals	two way, three way, four way, one-way, double.

CALCULATION
The load capacities of the various parts of the structure take into account the weight of the structure itself and the effective load and are based on the hypothesis of a uniformly distributed load (u.d.l.). Calculations for determining the load capacity of the GL8 long-span mezzanine floor were made in accordance with the normal methods used in the science and construction industry, using conservative calculation models designed to promote safety. The strength parameters of the sections were determined by deducting the area of the main holes and then applying part 3.1 of Eurocode 3 to check that the sections were entirely adequate for withstanding the projected flexural stresses. Geometrical characteristics of the beams were calculated with the aid of a specific software package designated Coldform. Deflections of structural parts in the gl8 long-span mezzanine floor are within 1/300 of the span.

The tests carried out and the entire set of algorithms used for the procedure comply with the most authoritative framework of standards and recommendations applicable in Italy and on a European level, including:
• UNI ENV 1993-1-1:1994 and UNI ENV 1993-1-3: 2000 (Eurocode 3 – Steel structures design);
• CNR-UNI 10011:1997 (Steel constructions: instructions for the calculation, the execution, the test and the maintenance);
• CNR 10022:1998 (Cold profiles: instructions for the use in the constructions);
• D.M. 09/01/1996 (Technical Norms for the calculation, the execution and the test of the normal, pre-compressed concrete structures and for the metal structures);
Application of the automatic code was supported by a prior series of experimental tests performed at university laboratories and designed to assess the principle geometric and physical parameters.