Lead castle

If an experiment or pilot plant is to be observed, a viewing window of lead glass may be used to give gamma shielding but allow visibility.

Laboratory or health physics detectors, even if remote from nuclear operations, may require shielding if very low levels of radiation are to be detected.

The castle can be made from individual bricks; usually with interlocking chevron edges to prevent "shine paths" of direct radiation through the gaps.

Lead castles can be made of hundreds of bricks and weigh thousands of kilograms, so the floor must be able to withstand a heavy load.

It is best to set up on a floor designed to carry the weight,[2] or in the basement of a building built on a concrete slab.