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Spiral staircases - LG-SpecialGratings made of steel, gratings made of stainless steel, gratings made of aluminium, GRP-gratings, gratings fpr sun protection, gratings for coverings, perforated metal planks, pressure-locked gratings, forge-welded gratings
Spiral staircases, type "LG Special" in galvanized finish are developed in modular system for self-assembly. They are functional and reliable and suitable for many types of application.
Spiral staircases, type "LG Special" are produced with a maximum diameter of 2700 mm.
For areas accessible to the general public, guarding systems are fabricated with the maximum clear space distance between rail stanchions of 120 mm, whereas for industrial areas the maximum clear space distance is 180 mm.
The height of the handrail measured from the leading edge of the tread to the top of the handrail, should not be less than 1000 mm, except where the total height of the stair exceeds 12m and then this distance should not be less than 1100 mm.
Calculations are carried out to determine the design requirements for staircases, by considering a uniformly distributed load of either 3,5 kN/sq.m, or a concentrated load of 1,5 kN applied over an area of 100 x 100 mm from the leading edge of the nosing, at a distance of 100 mm from the outside line of the stair.
Tread widths are supplied in accordance with the German Standard DIN 18065.
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