O.S. Abejide  , P.E. Masce  , 
    Evaluation of Effective Lengths of Braced Double Angle Diagonals,
    Research Journal of Applied Sciences,
    Volume 2,Issue 10,
    2007,
    Pages 1060-1065,
    ISSN 1815-932x,
    rjasci.2007.1060.1065,
    (https://makhillpublications.co/view-article.php?doi=rjasci.2007.1060.1065)
    Abstract: The effective lengths required for bracing of double angles have been investigated at all fixity ranges. Results indicate that the effective length factors as used in codes and structural analysis are conservative. Except for certain cases as site conditions may allow, it may be predicted as required. Also these effective length factors as may be predicted are only reliable especially when the slenderness ratios of the double angles are high and in the range of 180-250.
    Keywords: Effective lengths;braced double angles;diogonals;evaluation;Nigeria