2 or 3
more than 3
(4) For gravity loading, if there are more than three equally spaced anti-sag bars, the buckling length need not be taken as greater than the value for two anti-sag bars, with La = L/3.
(5) If the compressive stress over the length L is almost constant, due to the application of a relatively large axial force, the buckling length should be determined using the values of rji from table 10.2 for the case shown as more than three anti-sag bars per span, but the actual spacing La.
(6) For uplift loading, provided that 0 < R0 < 200, the buckling length of the free flange for variations of the compressive stress over the length L0 as shown in figure 10.5, may be obtained from:
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