The nuts weren't loose; it appears that the bolts were. From what I'm reading, epoxy is used to bond the bolt to the concrete. But to be effective, the hole must be clean, the bolt must not have any grease on it, the epoxy must be mixed in the correct ratio, moisture must be avoided, and it...
This article looks at the suspension system used to hold up the concrete slabs.
http://news.bostonherald.com/localRegional/view.bg?articleid=147984&format=&page=1
I spent the last ten years in the manufacturing industry as an electrical engineer. In my region, manufacturing has been declining, making it difficult to find stable employment. I thought that if I got my PE license, it would be easier to find work, but that hasn't been true, mostly because...
Raffaello:
If you want to go off on your own and design products, there is nothing stopping you. You can call yourself a mechanical designer, list what your skills are, and perform all those skills. The only thing is that you can't call yourself an "engineer", offer "engineering" expertise...
In the US, see NFPA 780: Standard for the Installation of Lightning Protection Systems 2000 Edition. If I remember, it costs about 40 US. Chapter 6 is titled: Protection for Structuures Containing Flammable Vapors, Flammable Gases, or Liquids That Can Give Off Flammable Vapors.
I have also wondered whether I am selling myself short. One of the things I have been tempted to do was to place a blind ad in the newspaper: Electrical Engineer Wanted: Must have 5-7 years experience in switch mode power supply design, thorough understanding of magnetics, EMI, layout, and...
From Connecticut General Statutes, industrial exemption is explicitly stated:
Sec. 20-309. Exemptions. The following persons shall be exempt from the provisions of this chapter: (1) An employee or a subordinate of a person holding a license under this chapter, provided the work of such...
