How can I set the tick marks of the x axis in RectangleChart?

By default, the x-axis in RectangleChart is not labeled. Using Axis -> {True, True} does not help. Can I set the ticks manually?

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@R.M ticks was what was I after (I fixed the title). –  Karsten W. Sep 18 '12 at 18:55

By default RectangleChart leaves spaces between the bars and uses categorical axes, similar to BarChart. If you set BarSpacing -> None, no space is left and you get a regular axis with a quantitative scale on it:
 RectangleChart[vekk = {{1, 1}, {1, 2}, {3, 4}},
Frame -> {{True, False}, {False, False}}, Ticks -> None]