| 摘要 |
There is provided an extruded, modular panel unit for the construction of wall-surface portions, especially of light-transmitting wall-surface portions. The panel comprises two sheet-like major surfaces interconnected and spaced apart by a plurality of web-like ribs dividing the space delimited by the major surfaces into a plurality of subspaces, and at least one joining flange extending in the direction of extrusion and projecting at an angle from an edge of the panel unit. In cross section, the sheet-like major surfaces and the ribs form a truss-like structure of which the major surfaces constitute the chords and the ribs constitute the webs.
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