Cantilever street columns

Description

The wind action on cantilever signals with an important outreach or on boards with big dimensions produces on the support exceptional stresses. The best solution in such cases is represented by signal supports with “cantilever” butterfly or gantry shape”. Manufactures with the same technology of the steel plate columns, they are designed and manufactured with sections suitable to the required performances, according to the standard in force.

Cantilever street columns with polygonal cross section, manufactured under certified quality check according to ISO9001 by authorised processing centre according to DM 14/01/08, composed of 2 elements (straight part + bracket) to be joined at sight by forced overlapping, obtained by cold forming of trapezium of pressed steel plate and subsequent external longitudinal welding carried out by approved automatic process (submerged arc) and welding check according to EN ISO 3834.

Protection against corrosion by means of hot dip galvanisation obtained with the following cycle: degreasing; pickling, washing, fluxing, pre heating; hot dip galvanization in melted zinc bath at 440÷450°, with minimum percentage of zinc into the bath³ 98.5%. Coating obtained according to UNI EN ISO 1461 with minimum thickness 55 microns et average 70 microns.

External painting, if any, with colour from our colour card, rough effect, obtained with thermosetting powders cycle including: cleaning from zinc coating burs; smoothing of the surfaces by means of a light mechanic device; cleaning of the surfaces in order to eliminate grease or dirty and create a good adherence base; application by means of electrostatic spray of polyester powder suitable for galvanized surfaces for outside installation, in order to reach 60/80 micron thickness; polymerization into oven at constant temperature of approx. 200° for 40-50 minutes, package for each column, by banding with tissue 100% polyester, (no pluriball), in order to avoid damages during the handling phase. The characteristics of the obtained coat will be: average thickness 60 micron, resistance to checkering test ISO2409, resistance to crash test to UNI8901

All steel structural components are manufactured according to EN 1090 in execution class ECX2, certified by third party according to european directive UE 305/2011.

In order to design the mast for telecommunication it is necessary to know the following data:
– Installation site
– dimensions, weight and arrangement of the board
– type of suports (cantilever, butterfly gountry)
– height and outreach