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Flex Cap
Flex Cap  is a door, ceiling or combined solution that uses a 
curtain design to accommodate non-uniform rack heights 
and third party racks. The Flex Cap solution requires a drop 
ceiling. If a dropped ceiling is present, this is the simplest 
combined solution to deploy.  
Most curtain system products require hardware to be 
installed. The Flex Cap solution is completely tool-less. 
It starts with a small clip that mounts on the drop ceiling 
runner. This clip has a small, round ball at the end that slides 
into a track on the aluminum extrusion that holds the vinyl 
material. Since the ball turns freely in the slot, the extrusion 
can be installed at any angle on the drop ceiling. It is not 
dependent on running parallel to either the long or the 
short runner in a drop ceiling, it can run at an angle.  
For fire protection purposes there is a fusible link in the 
clip that mounts on the runner. When the room heats up 
to 135°F, the fusible line melts and the film along with 
the aluminum extrusion drops to the floor allowing the 
suppression system to operate fully.
Dome Cap
The Dome Cap ceiling solution is truly unique. Designed 
exclusively for a 4’ aisle, the Dome Cap requires a uniform 
height of rack heights and two uniform rows of racks to 
work. It will work with virtually any rack manufacturer’s 
products. This is the easiest ceiling solution to deploy. It can 
be used in conjunction with any of the door types to make it 
a combined solution.
The Dome Cap consists of an aluminum box header that 
straddles the cold aisle with a 20’ length of the same vinyl 
film used in the Flex Cap solution. It pulls out the length of 
the aisle and is held in place on the edges by a sheet metal 
guide. 
For fire protection purposes, the Dome Cap also uses 
fusible links. The fusible links melt at 135°F, or may be wired 
into an audible alarm on the smoke detector. When the 
temperature reaches 135°F, or when the alarm sounds, 
the link is broken and the film safely retracts into the fire 
resistant aluminum header. Guides ensure that the film 
retracts smoothly when the fusible links are separated. 
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