Multi layer fire curtain

A multi-layer rolling fire curtain assembly positionable about an opening in a structure wall, comprising:

• a rotatable curtain roller having a longitudinal axis and positionable about the opening;
• a flexible multi-layer fire curtain comprising fire resistant material and being configured to be wrapped about the curtain roller and to be deployable from the curtain roller between an extended position wherein the opening is closed, and an open position, the multi-layer fire curtain having a first end fixed to the curtain roller, and a free end, the multi-layer fire curtain having:
• a fire resistant inner curtain layer arranged in contact with the curtain roller and having a first width W1 between first and second lateral edges, and
• a fire resistant outer curtain layer arranged opposite the inner curtain layer, wherein the outer curtain layer is longer than the inner curtain layer and has first and second scalloped lateral edges that vary between the first width W1 and a second width W2 less than W1;
• the inner and outer curtain layers being affixed to one another at the first end and the free end, and by a plurality of horizontally oriented connection seams, spaced apart from one another vertically to connect the inner and outer curtain layers to each other, each connection seam extending across the outer curtain layer where the outer curtain layer has the first width W1, the connection seams being provided at intervals so that the outer curtain layer forms a plurality of baggy areas between adjacent ones of the connection seams;
• and
• first and second guide channels arranged along a right-side edge and left-side edge of the opening, respectively,
• wherein the multi-layer fire curtain is configured and arranged so as to be received in and guided along a respective one of the first and second guide channels when the outer curtain layer has the first width W1.