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You can let a professional handle it for you, or an engineer in this area can do it.
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Double-layer ceilings and titanium bars can be used with a seven-figure crutch.
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Double double ceiling gold bar with seven-figure crutches.
There are many standards related to building doors and windows, and the specific sizes of the specified ones will not be clear for a while. >>>More
No matter what kind of buckle ceiling, the labor cost is not too much, which is about 30 per square meter.
It depends on what type of material Fenglu has, like 888 sliding window double steel about 260, 50 casement window four-link with 304 price of about 380, 50 broken bridge about 580.
Your question is a bit winding, if there is a zero line, it means that there is still a place of contact, check it.
The concave one is good-looking, saves space and also focuses light, and the visual effect is good.