| 摘要 |
PURPOSE: To achieve mass-production of building members by forming such that an interval between the upper end of a second structural member to be linked to a first joint portion of a first structural member and a second joint portion nearest to the upper end is differentiated from an interval between the lower end thereof and a second joint portion nearest to the lower end, to thereby enable adjustment of the location of the joint portions. CONSTITUTION: Four frames are made up of jambs 1 and rails 2. Dowel holes 5 are formed in the bottom surface of a longitudinal groove 3 formed in each frame 1, for engaging with the rail, at an interval W1 of about 30 mm and an interval W2 of 45 mm, and dowel holes 8 are formed in both inner peripheral surfaces of a lateral groove 6 formed in rail 2, at an interval W3 of about 30 mm. An interval W4 between the upper end of the top rail 2 and the space nearest to the upper end is set to about 45 mm, and an interval W5 between the lower end of the same and the hole 8 nearest to the lower end is set to about 40 mm, respectively. Further, an interval W6 between the upper end of the bottom rail 2 and the slit nearest to the upper end is set to about 35 mm, and an interval W7 between the lower end of the same and the hole 8 nearest to the lower end is set to about 45 mm, respectively. Then, a variety of four frame doors such as one having a frame which is shorter in height than the frame 1 by about 30 mm×n (integer), or one having a frame which is shorter in length by about 30 mm×n (integer) + about 10 mm are assembled. As a result, costs of the building members can be reduced to thereby achieve mass-production of building members.
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