The vacuum tube in a CRT can implode if it is broken or punctured. The surrounding air will rush violently into the unsealed vacuum in the CRT, spraying broken glass in every direction. Color CRTs may contain mercury or other potentially toxic materials.
Instructions. Build a hearth for a fireplace that is 16 inches deep, according to This Old House writer Harry Sawyers. This is the standard requirement for municipalities and homeowner associations. The hearth should also extend a minimum of eight inches on either side of the fireplace.
Here are some tips for selecting the correct sink depth for you and how you use your kitchen. Arciform. Kitchen sinks have been steadily growing in bowl depth. Most sinks used to be as shallow as 6 inches or less; the average today is 8 to 10 inches, and they can go as deep as 12 inches. If you repurpose a vintage sink, such as the one pictured here, it will likely be on the shallow side.