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.
Most kitchen stoves are 30 inches wide and 36 inches high. When it's time to remodel the kitchen, consumers have many choices among stove types. Ranges come in different colors and have different features, fuel types and price tags. But the dimensions of most stoves are fairly standard. The most common stove width is 30 inches, and most stoves are 36 inches high so they are flush with the standard kitchen counter height. The standard stove depth is 25 inches, but oven door handles often add a few inches.