METAL CARPENTRY

Metal carpentry TECHNOSTYLE
Metalworking, now widespread, has been consolidated since the nineteenth century.
The advantages of metal carpentry are related to the steel material (characterized by high tensile, compressive and non-flammable strength), the variety of commercial elements (profiles), the effectiveness of the connection methods.
Steel structures are essentially intended for metal carpentry, although new metal materials such as aluminum-based light alloys are used nowadays.
Building elements and systems
Metallic carpentry is widespread in civil constructions (pylons, multi-storey frames for buildings, shelters, bridge structures, etc.) and in industrial buildings (sheds, cranes, antennas, pylons for power lines, etc.)
Multi-storey metal frames are characterized by orthogonal trusses of beams and pillars connected with bolted or welded joints. The beam-to-column connection may or may not allow for bending moment transfer. In the first case, moment-resistant frames are produced: the frame is highly hyperstatic and the columns are bent. In the second hypothesis there are static pendular patterns obtained by placing hinge constraints on the beams in correspondence with the node with the column; in this case the pillars are simply compressed and the bracing function is typically performed by means of diagonal elements – the diagonals are also used as horizontal bracing to stiffen the horizontal ones – or by means of reinforced concrete cores embedded in the base and with a shelf.
In single-storey industrial buildings, the cantilevered pillars on which the main roof beams rest (also indirectly through edge beams) typically stand out.
Depending on their profile, the main general purpose rolled steels used in metal carpentry are:
• leaves
• plates and wide plates
• the bars
• pipes also welded
• the sections:
or in double T sections
 IPE –HE-INP-ISE-HSH-HSA-HSL-HSE-HSD-HSU.