| 摘要 |
A roof is made of light alloy sheets forming the bases of solar heating panels. - The sheets are pref. of an aluminium and manganese alloy and may be covered with double 6mm thick panels of cellular polycarbonate. The sheets may be 1-2mm, thick and formed with gutters. Sheets 1.5 m wide and 4.8 m long can be bolted to 12 x 12 cm or 15 x 15 cm timbers to form the roof with expansion flanges at their edges. The panels may have polyisocyanate foam bases and neoprene or polyurethane joints. (11pp Dwg.No.0/0)
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