The firm at which I am currently employed is quite busy. We are a smaller firm (5 employees), and we handle a variety of projects (residential, commercial, light industrial).
You noted that your firm is in the heavy industry sector. I too was working in that sector up until last year. I noticed a significant slowdown in the work in this sector. I believe it is the result of the "slow" economy, whereby companies are postponing larger projects until their sales increase. In my opinion, it is the result of the nature of the stockmarket, where companies are measured heavily on a quarterly basis, with little regard for the long-term outlook for a company.
Hang in there, the economy is expanding. I suspect the heavy industry players will open up their purses fairly soon. I have already seeen it with some of the companies that I used to do work for.