| 摘要 |
A fire retardant wall unit including a foam block and first and second steel pans is provided. The first steel pan and the second steel pan both have a left flange and a right flange. The foam block, the first steel pan, and the second steel pan are all about equal in length. When the wall unit is assembled, the foam block lies between the first and second steel pans, the left flange of the second steel pan overlaps the left flange of the first steel pan, and the right flange of the first steel pan overlaps the right flange of the second steel pan, in an offset manner.
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