| 摘要 |
A building panel has first and second opposed marginal ridges. The first of the marginal ridges is provided with an attachment zone whereby the panel is attachable to a building structure by at least one fastener. The second marginal ridge is of different cross-section but partly complementary to the first marginal ridge and can be laid in overlapping relationship over a first marginal ridge of an identical panel already attached to a building structure. The second marginal ridge then covers and conceals the attachment of the identical panel to the building structure. |
