| 摘要 |
PROBLEM TO BE SOLVED: To provide an extension construction method for a purlin enabling reduction of labor, cost, and waste in extension construction work of a house. SOLUTION: A purlin receiver connection part 4 is fixed to a purlin receiver fitting 2 by tightening the purlin receiver fitting 2 and the purlin receiver connection part 4 by a tightening device 200 using a purlin extension fitting 2 having the purlin receiver connection part 4 provided on a purlin receiver fitting 103 provided on an existing hip rafter beam 101 positioned at a boundary of the existing house and an extension part and a purlin connection part 5 forming substantially 90 degrees for the purlin receiver connection part 4. The purlin connection part 5 and an end part 3 of a new purlin 1 are tightened by the tightening device 200 to install the new purlin 1 on extension of the existing purlin 100. COPYRIGHT: (C)2004,JPO
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