| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an iron frame beam capable of forming a floor level difference with an identical structure in a joint section of posts.SOLUTION: The iron frame beam includes: a first beam part which is joined to a first joint section of a first post; a second beam part which is joined to a second joint section disposed at a position higher than the first joint section of a second post which is dispose facing to the first post; and a third beam part both ends of which are connected to the first beam part and the second beam part with the bottom face arranged to be flush with the bottom face of the second beam part but higher than the bottom face of the first beam part to form a step with respect to the first beam part and with the upper face arranged to be flush with upper face of the first beam part but lower than the upper face of the second beam part to form a step with respect to the second beam part.</p> |
