| 摘要 |
The shutter comprises a frame delimited by uprights and cross members (2,3). This frame delimits a bedplate (7a) supported on a wall (17) edging the opening (A). The uprights and cross members form re-entrant edges (10a), corresponding to beams (8a), which are extended by a second bedplate (11a). The frame supports a door panel and has sections (12a) turned towards the opening for placing tie rods (14) passing through a bar for clamping it inside the wall. Covering joints extend in part between the door panel and the uprights.
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