Structural Steel Essay

1754 Words8 Pages
Chapter 1 1. INTRODUCTION 1.1 General The various materials used in modern construction are concrete, bricks, timber, steel, etc. Each material has its own advantages and disadvantages. Advantages of structural steel include strength, speed of construction, prefabrication, high strength to weight ratio, sustainability, good fire resistance, and demount ability and good scrap value among others. It is used in load bearing frames in buildings and as members in trusses, bridges and space frames. Structural steel can be classified as: 1. Hot rolled steel section 2. Cold form steel section 1.1.1 Hot rolled steel section : Hot rolled steel is manufactured by rolling steel over a temperature of 1000° F. Hot rolled steel reconfigures during…show more content…
Even though a complex section may require about 15 pairs of rolls, time taken to set up the pairs of rolls maybe in days. The speed of rolling varies from 6 to 92 m/min. The usual speed is in the range of 23 to 46 m/min. The formed section is then cut according to the lengths required. The length required is generally in the range of 4 to 15 m. The thickness of the material is restricted to about 19 mm for carbon steel and for stainless steel; the thickness varies from 0.2 to 7.6 mm. The ranges for tolerances usually depend on section size, the product type, and the material…show more content…
Simple sections such as angles, channels, and Z-sections are formed by press brake operation from sheet, strip, plate, or bar in not more than two operations. More complicated sections may take several operations. It should be noted that the cost of products is often dependent upon the type of the manufacturing process used in production. In addition to the strength and dimensional requirements, a designer should also consider other influencing factors, such as formability, cost and availability of material, capacity and cost of manufacturing equipment, flexibility in tooling, material handling, transportation, assembly, and

More about Structural Steel Essay

Open Document