| 摘要 |
<p>The method is used for installation of roof structures in small housing building, and comprises the installation of the roof trusses on the roof shell or a section of it, directly on the bottom area. The roof shell is then lifted from the base area and placed at the side of it. The wall units are then installed and fixed, and the roof shell is then craned into position on top of the walls and fixed.</p> |
