The table below shows how Nelson-Farrar indexes have changed during 2006-08 for selected basically nonmetallic building materials.
Data are included for the overall nonmetallic group, five nonmetallic materials, and iron castings.
Fireclay brick and iron castings indexes showed the greatest changes.
Fireclay brick, showing the greater gains of the two, changed to 1,805.6 in fourth quarter 2008 from 1,516.2 in first quarter 2006. Iron castings changed to 1,607.7 in fourth quarter of the period tested from 1,332.7 in the first quarter.
Concrete ingredients and concrete products showed more moderate changes, although none of the changes in the indexes was drastic. The concrete ingredients index rose to 1,242.2 during the 3-year period from 1,061.0. During the same period concrete products changed to 1,015.7 from 891.7.
The two smallest index changes occurred in the clay products and building brick categories. Clay products changed to 981.9 in fourth quarter 2008 from 937.1 in first quarter 2006. Building brick changed to 1,434.0 during the time period from 1,376.9.
The final category, the overall nonmetallic index, changed to a high of 1,110.0 during fourth quarter 2008 from 941.2.
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