| 摘要 |
<p>The door for an animal shed has metal section Z-shaped case frame and door frame with double-walled filling. The latter is a closed box section (1-12). One side (2) has an extension (4) connected to an extension (5) at right angles to the vertical side (3). The side (7) opposite this has a right-angled extension (8) riveted or welded to an extension (9) of another side (6). The U-shaped attachment (8,11,12) and first two extensions are diagonal to each other. This attachment accommodating one piece of walling or wood cladding (14) and the attachment formed by these two extensions accommodates the other (13). This is not affected by moisture or differences in inside and outside temperature, and is stable without cold bridge.</p> |
