| 摘要 |
<p>The roller shutter case incorporates two parallel lengthways walls, an interconnecting cover piece, and two end walls (14) which accommodate the shutter mounting. All these parts are made of metal. Stiffening elements (4, 5) are fitted in the area of the cover piece (3). On the side facing away from the cover, the lengthways walls (1, 2) are fitted with tension chords (6, 7). There are light concrete elements (9), or similar, in front of the outside lengthways wall (1), fastened to it by retaining devices (8, 10). The tension chord on the outside may be fitted with a retainer for these elements.</p> |
