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Report to Masonry Research on Fire Resistance of Masonry Wall No. 3

  • ID:

    72

  • ESCSI:

    3220.031

  • Author:

    Troxell, G.E.

  • Publication Name:

    Report to Masonry Research on Fire Resistance of Masonry Wall No. 3

  • Type of Publication:

    Collection

  • Publisher:

  • Dated:

    1968

  • Issue/Volume:

    August 26

  • Other ID:

  • Page(s):

    14 +

  • Reference List:

    N

  • Abstract:

    A summary of the times to cause a maximum temperature rise of 325 F and an average temperature rise of 250 F are shown for each wallette in Table 6. For wallettes showing a failure by thermal transmission at a raked joint before failure occurred elsewhere, values of the time to cause failure when excluding those for the raked joint are also shown.A study of Table 6 shows that when excluding the thermal resistance value for raked joints, the 24 wallettes tested can be divided into four groups.
    For the walls which had empty cells, the temperature rise of the unexposed face was often greatest opposite such cells as these locations did not have the benefit of the block webs. However, this was not always so, as in many other walls the temperature rise was often greatest at a joint, either horizontal or vertical.
    Where thermocouples were located on horizontal joints having mesh or metal ties, but the blocks had empty cells, such locations usually showed greater temperature rises than for other locations.
    Walls having raked joints had greater temperature rises at such joints than for other similar locations, considering the blocks, but where the joints were not raked.