E - Fixed Constructions – 06 – B
Patent
E - Fixed Constructions
06
B
160/16
E06B 9/06 (2006.01)
Patent
CA 1062141
ABSTRACT Radiation shielding for limiting the transfer of heat by radiation is provided for a ceiling closure having a curtain wall shiftable from an open position allowing air flow through an opening in the ceiling to a closed position in which the curtain wall blocks air flow through the opening. the radiation shielding comprises a plurality of radiation shields formed of air impermeable, heat resistant, flexible fabric sheets folded for stowage and for unfolding into generally planar sheets with shifting of the curtain well intr the closed position wherein the fabric sheets define and con- fine a deed air space. The sheets are structurally substantially stable for extended periods at high temperatures occasioned by fire and are preferably made of tightly woven asbestos coated to retain asbestos fibers against liberation into an air stream. Reflective coatings act to retard the radiation of heat. The closure moves to the closed position upon release of a temp- erature actuated link.
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