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Burst, of course! The tighter it is pulled, it won't fall off.
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Expansion nail is good!!
Gypsum board ceiling fixed gypsum board should be used self-tapping screws, screw caps should be driven into the gypsum board and flush with the board surface, but not too deep to break the paper.
In the case of gypsum ceiling, a wooden keel is generally made on the top now, and the gypsum board is nailed to the wooden keel with nails, otherwise how to be stressed.
This mainly depends on which part you install? Downlights and spotlights are both auxiliary light sources. >>>More
For engineering use, it should be Class A fireproof.
Generally use downlights, downlights do not focus, spotlights are spotlights, spotlights are generally used for one of your decorations to illuminate the atmosphere, such as decorative paintings, ornaments, art ornaments, etc. Downlights are generally better for ordinary household lighting, and spotlights are used more in entertainment venues, such as KTV and cinemas.