Suspended ceiling system

1. A grid system having a width comprising:

a plurality of curved main runners in spaced parallel relationship, each having a strengthening bulb and being curved in a single plane;

one or more substantially linear elongated primary carriers, each primary carrier being substantially perpendicular to each main runner and spanning substantially the width of the grid system, each having a slot therein adapted to receive the strengthening bulb of each of the main runners and comprising at least two coaxial tube members secured to each other end-to-end by a splice tube, the splice tube having an outside diameter corresponding to the inside diameter of the tube members; and

one or more first clips for securing each of the main runners to each primary carrier with the curves of the main runners being aligned.

2. The grid system of claim 1 further comprising a plurality of spaced primary carriers, the primary carriers having ends that overlap so that together the primary carriers span substantially the width of the grid system.

3. The grid system of claim 1 wherein the primary carrier comprises a carrier tube having a circular cross-section and the first clip has a central open portion with a shape complimentary to the cross-section of the tube.

4. The grid system of claim 1 wherein the tube members are formed with a lock seam and the splice tube includes a slot adapted to receive the lock seam.

5. The grid system of claim 1 wherein at least one of the tube members includes a stop to limit the extent of insertion of the splice tube into the tube member.

6. The grid system of claim 5 wherein the stop comprises an inwardly projecting embossment.

7. The grid system of claim 1 wherein the first clip is adapted to seat on the primary carrier and has opposed faces for capturing the bulb of the runner therebetween.

8. The grid system of claim 7 wherein the first clip includes at least one screw extending through the opposed faces for drawing the opposed faces toward one another for capturing the bulb of the main runner.

9. The grid system of claim 8 wherein the first clip includes a stand-off between the opposed faces to limit the degree to which the opposed faces can be drawn toward one another.

10. The grid system of claim 9 wherein the stand-off is a tubular member adapted to be received on the shaft of the screw.

11. The grid system of claim 1 further comprising at least one trim piece that defines an outer edge of the grid, the trim pieces having opposed slots, and a second clip comprising three L-shaped segments, each segment having a first leg to which the adjacent segments are secured to each other and adapted to support the primary carrier and a second leg extending generally perpendicular to the first leg, a portion of which is a adapted to be received in one of the opposed slots on the trim piece.

12. A grid system having a width comprising:

a plurality of curved main runners in spaced parallel relationship, each having a strengthening bulb and being curved in a single plane;

one or more substantially linear elongated primary carriers, each primary carrier being substantially perpendicular to each main runner and spanning substantially the width of the grid system, each having a slot therein adapted to receive the strengthening bulb of each of the main runners; and

one or more first clips adapted to seat on the primary carrier and having opposed faces for capturing the bulb of the runner therebetween for securing of the main runners to each primary carrier with the curves of the main runners being aligned, each first clip having at least one screw extending through the opposed faces for drawing the opposed faces toward one another to capture the bulb of the main runner, each first clip including a stand-off between the opposed faces to limit the degree to which the opposed faces can be drawn toward one another.