First you have to contact the contractors who are in general and ask them about the bids. The General contractor will provide you free specification and plan for your career if you are a good fit for any of these jobs. Few general contractors have held their plan room even if they are in online or any office. They contain in to themselves a specification for all current jobs and contain copies of the plans. The bidders who are interested in bidding their bid will come in to their room and view the plan or otherwise they can also copy the plan for using bids.
Check the federal web site for the opportunities for the current federal bids. This web site will contain many specifications and information on bids. In few cases you are asked to pay a small deposit or bills or are asked for request plans. This will be returned if you bid on this job. Many times you can access specifications and plans for free. Using the listed in website in the section of resources you can look for government bids into your state. You can also find the opportunity of biding in your state that will be sent drawing specifications to allow you to bid.