STRUCTURAL STEEL 417 



the parts are ready to be assembled, they are riveted by 

 means of riveting machines operated by compressed air. 

 After the ends have been faced off, the work is ready to be 

 painted and erected. Men known as erectors put the beams 

 in place and supervise the riveting of them by the riveters. 



Questions 



1. Explain the demand for structural steel. 



2. Explain how structural steel is made. 



3. What properties of steel and iron are utilized in structural 

 work? 



4. What fastening agents are used in structural steel? 

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