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5# manyu
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找回以前的貼子,對我來說也不容易,還是簡單再說一遍好了 Possible causes are:4 A' v8 b- i* e; K: l6 b) G
1. sub floor did not hold tight to the floor joists. Screws are doing better than nails for this purpose.
& m5 Y3 I- J/ m9 V u# v9 h& O5 ^1 E2. supporting beams are a bit too far away from each other.
7 A+ |6 |$ z, Y# ^8 b0 {3. supporting beams are not level due to earth settlement.
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For 2, you may need someone with engineering knowledge to find out, but there should be a building code governing the span distance. For 3, you can go down the basement to do a visual check yourself.
8 L* W* L" t) D9 \. I: z6 T7 pBut anyway, insist the builder to fix the problem right away, don't let them get away with 6 months time. |
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