| 摘要 |
PROBLEM TO BE SOLVED: To provide an airtight structure which ensures airtightness of rooms on a lean-to part of a house, and facilitates its construction. SOLUTION: The airtight structure is obtained by arranging an I-shaped joint member 101 which joins ceiling joists 8 together via its both sides, so as to be in parallel with a beam 4 and so as to make close contact with a ceiling board 9, and by interposing airtight foam 102 and a spacer 103 between the beam 4 and the I-shaped joint member 101. |
