Use 3.5N or 7N foundation blocks?

Discussion in 'Builders' Talk' started by Jiv, Apr 4, 2007.

  1. Jiv

    Jiv New Member

    I know the number relates to the compressive strength of the blocks, but I'm unsure where the 7N ones would be used in preference to the 3.5N ones.

    Any ideas?
  2. ­

    ­ New Member

    When the build is over 3 storeys or where point loads are expected.

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