| 41. | These extra screws will eliminate vibration of the housing against the joist.
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| 42. | Chances are the strapping is still secure to the joists.
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| 43. | The channels allow the ceiling finish to be separate from the joists.
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| 44. | One-piece doors have two tracks hanging from the ceiling joists.
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| 45. | Generally a bearing wall runs at right angles to the joists above.
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| 46. | The same thing occurs on the joists above the ceiling.
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| 47. | But it is still better to nail into the joists.
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| 48. | Are they driven into the lath, the strapping or the joists?
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| 49. | It is better to drive the mounting screw directly into a joist.
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| 50. | However, it must be positioned in the center of the joist.
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