| 摘要 |
The invention provides a ceiling-grid system including a main-runner and a cross-tee. The main-runner has a main-runner tee-portion including at least one opening having a frustoconical portion and a second portion. The cross-tee has a cross-tee tee-portion and a cross-tee support shoulder. The cross-tee tee-portion includes an end and a projection extending from the end. The cross-tee support shoulder is coupled to the cross-tee tee-portion and the projection is insertable into the frustoconical portion and slidable into the second portion.
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