These items are ideal when drain works are requested; they are purposely drilled in the lower quarter of the section.
Lightness, resistance and functionality make this item easy to install and therefore economically advantageous.
The corrugated steel of the sheet has a unitary tensile stress which is not lower than 360 kg/mm2 and it is protected on both sides by a “SENDZIMIR” galvanization process, with 200 nominal grams of zinc per m2.
The backfilling material used during the installation of the pipe must be permeable so as to make possible a rapid passage of waters; besides it must work as a filter so that to block smaller particles which could clog drain holes.
The various backfilling layers must be compressed very carefully : they will be avoided in this way sagging due to settlement phenomena. Spiroid draining steel pipes have holes of 8,00mm of diameter in the two quarters, they must be placed down so as to allow a correct pickling of waters.
The main appliances are :
Road and structures drainage;
Concrete structures lightening;
The suggested thicknesses, in relation to the diameter, correspond to the weights indicated in the following tables; any possible diameter not included in the table may be available on request.
The standard length of spiroid pipes is of 6,00 meters; any possible length, besides the standard ones, may be supplied on request.
If used in drainage works, the pipes are equipped with holes of a diameter of 8 mm, pitch of 78 mm arranged in a double line in the lower quarter of the section.
Pipes are available at a standard length of 6,00 metres ; it is possible on request to realize pipes from 4 to 9 metres.
Connection between different portions may be arranged with joint connections.
Road and structures drainage;
