Chatlog

** alecarrillo91 dice: ** Hey girls! How are you? ** Yo digo: ** good how about you ale? And lore? ** loredananeves dice: ** Fine thanks! So girls let’s talk about some building materials. Do you guys know about iron, stone, brick and steel? ** Yo digo: ** Yes! We know what they are made of and how they are used in constructions ** alecarrillo91 dice: ** Exactly! We also know about their advantages and disadvantages ** loredananeves dice: ** Ok sounds good, but what are the advantages of iron and steel over stone and brick? We should know about this in order to choose the right material when it comes to building a certain structure ** Yo digo: ** Well I know that steel and iron can be used for far stronger and taller structures with less expenditure than stone, brick, or wood and they can also be used to produce greater unsupported spans over openings, interior or exterior spaces.  ** loredananeves dice: ** Yes that’s right! And Ale do you know what is the importance of steel and iron after the 20th Century? <span style="font-family: Arial,Helvetica,sans-serif;">** alecarrillo91 dice: ** <span style="font-family: Arial,Helvetica,sans-serif;"> <span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">The evolution of steel frame construction in the 20th century entirely changed the concept of the wall and the support. <span style="font-family: Arial,Helvetica,sans-serif; font-size: 110%;">the ability of cast iron to bear loads and to be produced in an endless variety of forms, in addition to is resistance to fire and corrosion, quickly encouraged architectural adaptations, firs as columns and arches and afterward in skeletal structures. Cast iron was later replaced by steel because of its strength, elasticity and high resistance to stress. Welding steel allowed more continuous structures that could withstand more stress. <span style="font-family: Arial,Helvetica,sans-serif;">** loredananeves dice **** : ** <span style="font-family: Arial,Helvetica,sans-serif; font-size: 16px;">Perfect girls, what else? <span style="font-family: Arial,Helvetica,sans-serif;">** Yo digo: ** <span style="font-family: Arial,Helvetica,sans-serif; font-size: 16px;">Well do you all know the characteristics of steel? It is very important to know this so we can use it to our advantage. Steel is more strong, elastic, and workable than cast iron and it’s high resistant when applied all types of stress (tension, compression and bending) <span style="font-family: Arial,Helvetica,sans-serif;">** alecarrillo91 dice: ** <span style="font-family: Arial,Helvetica,sans-serif; font-size: 16px;">That is very good to know Marianne, and it can come in handy in the future! I think we should also know the disadvantages of steel, and more importantly, what solutions have been found. Normally, steel must be protected against corrosion by covering its surface, but alloys such as stainless steel have been developed for exposed surfaces. Aluminum and other light metal alloys have come to be favored for exterior construction because of they are weather resistant and don’t corrode. <span style="font-family: Arial,Helvetica,sans-serif;">** loredananeves dice **** : ** <span style="font-family: Arial,Helvetica,sans-serif; font-size: 16px;">Wow girls you sure did your research! The only thing I want to add is the definition of welding, its importance, and its characteristics. Welding is a fabrication or sculptural process that joins materials, usually metals or thermoplastics, by causing coalescence. This is often done by melting the work pieces and adding a filler material to form a pool of molten material. Many different energy sources or tools can be used for welding, including a gas flame, an electric arc, a laser, an electron beam, friction, and ultrasound. Welding may be performed in many different environments, including open air, under water and in outer space. Welding is a potentially hazardous undertaking and precautions are required to avoid burns, electric shock, vision damage, inhalation of poisonous gases and fumes, and exposure to intense ultraviolet radiation. <span style="font-family: Arial,Helvetica,sans-serif;">** Yo digo: ** <span style="font-family: Arial,Helvetica,sans-serif; font-size: 16px;">Now, don’t you girls wonder what shapes are formed with steel?A variety of shapes can be formed with steel; the most common are plates, angles, beams, and u-shaped channels. <span style="font-family: Arial,Helvetica,sans-serif;">** alecarrillo91 dice: ** <span style="font-family: Arial,Helvetica,sans-serif;">Precisely! I think we have covered many different and interesting things about steel but I wonder if aluminum and stainless steel are heavy metal alloys. <span style="font-family: Arial,Helvetica,sans-serif;"> <span style="font-family: Arial,Helvetica,sans-serif;">** Yo digo: ** <span style="font-family: Arial,Helvetica,sans-serif;">I can answer that! Aluminum is a light metal alloy but on the opposite stainless steel is a heavy metal alloy <span style="font-family: Arial,Helvetica,sans-serif;">** loredananeves dice **** : ** <span style="font-family: Arial,Helvetica,sans-serif;">Thanks Marianne and Ale, I think we have learned a lot about these materials in this chat <span style="font-family: Arial,Helvetica,sans-serif;">** alecarrillo91 dice: ** <span style="font-family: Arial,Helvetica,sans-serif;">Yes I think this is a great way to share ideas and the knowledge we have about these materials! It was nice talking to you guys! Talk to you later!! <span style="font-family: Arial,Helvetica,sans-serif;">** alecarrillo91 dice: ** <span style="font-family: Arial,Helvetica,sans-serif;">ok girls bye! <span style="font-family: Arial,Helvetica,sans-serif;">** loredananeves dice **** : ** <span style="font-family: Arial,Helvetica,sans-serif;">bye (: