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  2. Mason Contractors Association of America - Wikipedia

    en.wikipedia.org/wiki/Mason_Contractors...

    The association conducts various classes. Some programs include Masonry Foreman Development, Basic Masonry Estimating, Masonry Quality Institute, and other topics such as Masonry Wall Bracing and Understanding Masonry Codes and Standards. The MCAA provides information on careers in masonry to students, parents and high schools.

  3. Stonemasonry - Wikipedia

    en.wikipedia.org/wiki/Stonemasonry

    The blocks may be numbered so that the masons can follow the plan procedurally. The use of massive blocks reduces costs by minimizing sawing and fixer-masonry costs. The use of a crane reduces labor, accelerates construction, and allows the masons to precisely and quickly position the blocks.

  4. Seismic retrofit - Wikipedia

    en.wikipedia.org/wiki/Seismic_retrofit

    Seismic retrofitting is the modification of existing structures to make them more resistant to seismic activity, ground motion, or soil failure due to earthquakes.With better understanding of seismic demand on structures and with recent experiences with large earthquakes near urban centers, the need of seismic retrofitting is well acknowledged.

  5. Fire brick - Wikipedia

    en.wikipedia.org/wiki/Fire_brick

    A fire brick, firebrick, fireclay brick, or refractory brick is a block of ceramic material used in lining furnaces, kilns, fireboxes, and fireplaces. A refractory brick is built primarily to withstand high temperature, but will also usually have a low thermal conductivity for greater energy efficiency .

  6. Dutchman (repair) - Wikipedia

    en.wikipedia.org/wiki/Dutchman_(repair)

    A rail repair dutchman is typically a 4–6-inch (100–150 mm) long piece of rail that is cut in advance for the purpose and carried by a section crew. If the gang finds a rail with a chipped or broken end, they remove the connector plates ( fishplates ), cut out the damaged section, replace it with the dutchman, and bolt the connectors back ...

  7. Concrete degradation - Wikipedia

    en.wikipedia.org/wiki/Concrete_degradation

    It may be necessary to repair a concrete structure following damage (e.g. due to age, chemical attack, fire, [24] impact, movement or reinforcement corrosion). Strengthening may be necessary if the structure is weakened (e.g. due to design or construction errors, excessive loading, or because of a change of use).