Abstract: A self-locking beam clip for attaching an end of a beam to a column can having a vertical array of apertures with wide upper regions and narrow lower regions. The beam clip can be angle shaped having a front flange with one or more fixed connecting pins mounted thereon. Each fixed pin can have a shank sized to pass through both the upper and lower regions and an inner head sized to pass only through the upper region. A latch is provided which can be a bent member, having a flat lower portion connected to the front flange and an upper portion extending at an angle to the lower portion and away from the front flange. The lower portion can be configured to pivot about the front flange where it is connected. The lower portion also has a locking portion which projects through a hole in the front flange. In a locked position, when the beam clip is connected to a column, the locking portion automatically projects through an aperture common with one of the fixed pins.