| 摘要 |
A heat block (28) is positioned between the upper lateral flange (24) of a purlin (14) and the roof panel (16) supported by the purlin. The heat block is in the shape of a barbell in that it includes opposed side portions (33 and 34) that are sized and shaped to extend laterally beyond the purlin (14) out into the hot zone adjacent the upper portion of the purlin and the roof panel (16). The heat block is of greater stiffness than the adjacent blanket insulation so that the heat block reliably occupies the space in the hot zone. Phase change material (64) can be incorporated in the opposed side portions (33 and 34) of the heat block.
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