Mounting clamp for support assembly

A saddle for a support assembly comprising:

• a pair of flanges, each comprising an opening adapted to receive a crossbar and configured to partially surround components of a carriage supporting the crossbar, such that a depth measured between inner surfaces of the flanges is greater than a depth of the carriage;
• and
• a stem portion interposed between the flanges and comprising a fastener hole;
• wherein:
• when a fastener is tightened in the fastener hole, the flanges apply a load in double-shear, and the carriage applies the load in double-shear;
• and
• a length of a moment arm of the stem portion is proportional to the depth measured between the inner surfaces of the flanges and is greater than a length of a moment arm of the carriage proportional to the depth of the carriage.

A support assembly comprising:

• a hub slidably coupled to a crossbar, the hub adjustably supporting a sprinkler;
• and
• a clamp assembly on the crossbar, the clamp assembly coupled to a T-bar and comprising:
• a carriage comprising:
• a tab defining a first aperture adapted to support the crossbar;
• a back panel defining a second aperture adapted to support the crossbar;
• a lateral section extending between the tab and the back panel, the lateral section comprising a pivoting slot;
• a clamp comprising a projection extending through the pivoting slot of the carriage;
• and
• a saddle comprising:
• a first flange comprising a first orifice adapted to support the crossbar and align with the first aperture;
• a second flange comprising a second orifice adapted to support the crossbar and align with the second aperture;
• and
• a stem interposed between the first flange and the second flange.