| 摘要 |
<p>The building covering comprises at least two unitary building panels (1), each of metallic sheet material having a castellated portion (2) interconnecting two marginally extending ribs (3, 4). Both ribs (3 and 4) comprise upwardly extending sloping portions (6, 5), outwardly extending shoulders (7a, 7b and 11a, 11b) similarly connected by (12a, 12b to 13). Shoulder (7b) of rib (3) further comprises a free lip end (10) extending down and outward from the rib. Rib (4) further comprises a perpendicular support section (14) extending downwardly from shoulder (11a), connected at its lowermost end to a laterally extending base portion (15). The complementary engagement between two building panels is in the nature of a snap fit, such that no further fastening means are needed.</p> |
