When buildings, roads, bridges or utility systems are built or repaired, the work must comply with various building and safety codes. Construction and Building Inspectors make sure that these codes are followed. Most Inspectors work for federal, state and local governments. Inspectors start their work when a project begins and conduct follow-up inspections throughout the project to monitor compliance to the codes. Inspectors may use computers, cameras, test equipment and surveying tools. They log their work and file reports. If a job site cannot correct a code violation in a reasonable period of time, a government inspector can issue a stop order and close down a job until the violation is corrected. Inspectors often work in teams on large projects where specialized knowledge is needed. Electrical systems, plumbing, elevators and mechanical systems are examined by inspectors with experience in those areas. Inspectors are usually older, veteran workers with many years on the job as a manager, supervisor or craft worker. Individuals should also have a thorough knowledge of construction materials and practices. Good physical conditioning is needed to walk and climb around job sites. Government inspectors must pass a civil service exam. Construction and Building inspectors perform an important public service, making sure that buildings, roads and other structures are safe to use.