difference between metal profiled tubing

[odisseo 18]

excuse the banal question, when using metal boxes when profiled, according to the use and characteristics and the metallic stresses that will have to suffer, with which criterion chooses the one or the high, you would have a manual for the various applications or a selection of materials and sections thanks

 

[Er Presidente]

What do you mean by metal boxers?

 

[odisseo 18]

Profiles are l, u or upn, t, h or putrella ipe or hea, plate to i, boxed are tubular squares tubes and rectangles and boxes for fixtures/sea. , I know that the last if loaded are subject to crushing and oxidizing from the inside causing the wear caused by the condensation that corrodes them from the inside while the profiles would be more resistant and tenacious.
here is what field of use for profiles as for cartons. according to the manuals and regulations in which cases to use each other in construction and carpentry? Thank you.
http://www.fratubi.it/utility/http://www.sardelli1871.it/images/prontuario complete.pdf

 

[frank]

the choice of the section is often conceptual, not structural. you can solve identical structural schemes with tubular profiles, or open profiles. often the choice is architectural, economic, linked to the supply, to the surface treatments, to the installation.

 

[SMIRRO]

Profiles are l, u or upn, t, h or putrella ipe or hea, plate to i, boxed are tubular squares tubes and rectangles and boxes for fixtures/sea. , I know that the last if loaded are subject to crushing and oxidizing from the inside causing the wear caused by the condensation that corrodes them from the inside while the profiles would be more resistant and tenacious.

I have always considered the boxes as tubes (round section, square, rectangular, hexagonal, etc...) obtained by plastic deformation, then closure of the profile with welding. while profiles such as pipes or pipes obtained by extrusion or drawing.

Both have residual tensions related to the processes that have undergone in their creation phases, but those of the canned should have a beneficial effect on the resistance of the structure, because, if I don't remember badly, they are bent slightly more than the right angle, so they would tend to close even more, but this is prevented from welding. therefore any bending or cutting stress should win these tensions before affecting the resistance of the material.

in fact if you try to sew a boxed one this closes - tried personally, bet with a carpenter: I lost - .

 

[odisseo 18]

an old mold engineer told me that for supporting structures were preferable profiles, for a matter of resistance, the profile is oxidized externally and therefore either the zinc or hand paints, to remedy but the heart remains intact, the boxed externally seems intact, but if it forms condensates it is corrupted and if it does not keep noticeable it can also break in the case of a carrier element. Am I wrong? if you go to the store recommend the boxers say they are more aesthetic, but functionality and endurance?

 

[meccanicamg]

all profiles, open or closed that they are obtainable for hot drawing, cold drawing, extrusion, hot rolling and cold rolling.
each process has different characteristics on the material.
I'm sorry. Drawing they are raw superficially and therefore if you remove then of fresa they board because they are anomalous thesis. superior precision and smooth finish. it is better not to use them to make welded composite carpenters.
I'm sorry. lamine are much more homogeneous and are not tensioned, rougher surface with oxide and calamine. rounded edges. excellent to be soldered and milled. are used to compose all welded structural carpenters in a mixed way.
He's the one estrusi have the soft and homogeneous heart, with the best surface finish but it is necessary to warm and push, so it is done for complicated profiles and usually in aluminum.

open profiles avoid accumulating liquids and condensation which is more evident with tubulars and closed profiles.

if a carpentry made of tubular becomes necessary that the tubes are perforated, even only with a 5 mm hole but this avoids abnormal swelling at temperatures above 100°C.

everything else is done with electro-welded carpentry by hot rolled plates on thick thicknesses and instead on cold rolled for medium thicknesses.

Structural calculations and fem proved the choices of structural designers.

 

[gil]

the profile is oxidized externally and then or the galvanized or hand painted paints, to remedy but the heart remains intact, the boxed externally seems intact

That engineer was a somaro. you choose a profile based on the resistance and shape that best suits your needs. Usually important large buildings are made with open profiles like hea, ipe etc because they have a better price/strength ratio. but both types can be galvanized with the same results.

Once laid, it is unlikely that you will make a restoration of the protective surface. the norm estimates a duration for the galvanization that for how long it is not infinite. but have you ever seen a palace in the state of only structure to restore the galvanization and then rebuild it? so much it is worth demolishing everything.

It would be easier for a shed, whose profiles are not covered, but for a thousand reasons I do not dilute, in practice it is not done.

 

[SMIRRO]

all profiles, open or closed that they are obtainable for hot drawing, cold drawing, extrusion, hot rolling and cold rolling.

the doubt, however, is what can be defined as boxed and profiled, or if the two terms are in some interchangeable cases.

 

[odisseo 18]

thank you for the just clarifications, I do not go into the technical preparation of anyone, I am not an engineer I cannot trade union I am not the devil's attorney
the damp that provides me the material, owns an old weight book size
for beams there are tables for the calculation of beams, for monorotaries, peak loads for pillars with examples made for portals with example calculations. I would need a similar booklet to help me to realize small structures small artifacts, clearly, not accessible by people, but for personal use, thanks again

 

[MassiVonWeizen]

I don't know if that's what you were looking for.https://www.oppo.it/tabelle/profilati_hea.htmhttps://www.promozioneacciaio.it/cms/it7433-i-prodotti-in-acciaio.asp

 

[odisseo 18]

thanks for the availability I was looking for an opuscoletto that is consulted in order to orientate itself in the purchase of semi-finished with practical examples calculations, in ancient times I have seen several of these booklets, with the advent of the net have disappeared these very useful paper brochures that I believe provided the big producers, thanks again excuse me if I took advantage of your precious time thanks again

 

[meccanicamg]

thanks for the availability I was looking for an opuscoletto that is consulted in order to orientate itself in the purchase of semi-finished with practical examples calculations, in ancient times I have seen several of these booklets, with the advent of the net have disappeared these very useful paper brochures that I believe provided the big producers, thanks again excuse me if I took advantage of your precious time thanks again

the booklets that provided the producers still make them but of formulas for the resistance I do not have in mind that there are. We'll see if we find something to share it.
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[gil]

I think you're looking for a steel profile prontuary.
manuals that within them, for some profiles, contain table like this. that for example shows the maximum distributed load, in relation to the distance between the supports and the type of profile.

Do I understand? try to do a search, they are still online to download for free, although there are few left.

 

[odisseo 18]

thanks for your availability and your kindness, it goes as if with this I do not want to replace the professionalism of the technicians, for "series" structures accessible from third parties, you always need the advice of the specialized technician, these tables these manuals serve only to orientate in the purchase and the choice of the materials to be used . thanks again

 

[odisseo 18]

I'm sorry if I get back to the debate, you could relink the addresses of the tables, I can't access it, thank you again excuse me if I insist